{"id":52036,"date":"2025-06-17T16:12:18","date_gmt":"2025-06-17T10:42:18","guid":{"rendered":"https:\/\/www.iquanta.in\/blog\/?p=52036"},"modified":"2025-07-01T12:48:16","modified_gmt":"2025-07-01T07:18:16","slug":"sql-commands-cheat-sheet-25-most-popular-commands","status":"publish","type":"post","link":"https:\/\/www.iquanta.in\/blog\/sql-commands-cheat-sheet-25-most-popular-commands\/","title":{"rendered":"SQL Commands Cheat Sheet: 25 Most Popular Commands"},"content":{"rendered":"\n<p>Whether you are an experienced developer or a fresher it is very essential to learn SQL commands to work with databases easily. Structured Query Language (SQL) is the standard and popular language to manage multiple relational databases. <br>If I&#8217;m talking about various job roles whether it is <a href=\"https:\/\/www.iquanta.in\/blog\/what-is-data-analytics-a-complete-guide\/\">Data Analyst,<\/a><a href=\"https:\/\/www.iquanta.in\/blog\/business-analytics-what-is-it-and-why-is-it-important-in-business\/\"> Business Analyst<\/a> and some other data field roles, SQL is considered to be the essential choice among the working professionals.<\/p>\n\n\n\n<p>In this blog we will be talking about the cheat sheet of 25 most popular SQL commands. From retrieving data to different modifications these commands are really useful in daily real-world projects by data professionals, developers and analysts.<\/p>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_77 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.iquanta.in\/blog\/sql-commands-cheat-sheet-25-most-popular-commands\/#What_are_SQL_Commands\" >What are SQL Commands?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.iquanta.in\/blog\/sql-commands-cheat-sheet-25-most-popular-commands\/#Top_25_Most_Commonly_Used_SQL_Commands\" >Top 25 Most Commonly Used SQL Commands<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.iquanta.in\/blog\/sql-commands-cheat-sheet-25-most-popular-commands\/#SELECT\" >SELECT<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.iquanta.in\/blog\/sql-commands-cheat-sheet-25-most-popular-commands\/#WHERE\" >WHERE<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.iquanta.in\/blog\/sql-commands-cheat-sheet-25-most-popular-commands\/#INSERT_INTO\" >INSERT INTO<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.iquanta.in\/blog\/sql-commands-cheat-sheet-25-most-popular-commands\/#UPDATE\" >UPDATE<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.iquanta.in\/blog\/sql-commands-cheat-sheet-25-most-popular-commands\/#DELETE\" >DELETE<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.iquanta.in\/blog\/sql-commands-cheat-sheet-25-most-popular-commands\/#CREATE_TABLE\" >CREATE TABLE<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.iquanta.in\/blog\/sql-commands-cheat-sheet-25-most-popular-commands\/#ALTER_TABLE\" >ALTER TABLE<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.iquanta.in\/blog\/sql-commands-cheat-sheet-25-most-popular-commands\/#DROP_TABLE\" >DROP TABLE<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.iquanta.in\/blog\/sql-commands-cheat-sheet-25-most-popular-commands\/#TRUNCATE_TABLE\" >TRUNCATE TABLE<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.iquanta.in\/blog\/sql-commands-cheat-sheet-25-most-popular-commands\/#JOIN\" >JOIN<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.iquanta.in\/blog\/sql-commands-cheat-sheet-25-most-popular-commands\/#GROUP_BY\" >GROUP BY<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.iquanta.in\/blog\/sql-commands-cheat-sheet-25-most-popular-commands\/#ORDER_BY\" >ORDER BY<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/www.iquanta.in\/blog\/sql-commands-cheat-sheet-25-most-popular-commands\/#HAVING\" >HAVING<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/www.iquanta.in\/blog\/sql-commands-cheat-sheet-25-most-popular-commands\/#DISTINCT\" >DISTINCT<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/www.iquanta.in\/blog\/sql-commands-cheat-sheet-25-most-popular-commands\/#UNION\" >UNION<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/www.iquanta.in\/blog\/sql-commands-cheat-sheet-25-most-popular-commands\/#LIKE\" >LIKE<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/www.iquanta.in\/blog\/sql-commands-cheat-sheet-25-most-popular-commands\/#IN\" >IN<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/www.iquanta.in\/blog\/sql-commands-cheat-sheet-25-most-popular-commands\/#BETWEEN\" >BETWEEN<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/www.iquanta.in\/blog\/sql-commands-cheat-sheet-25-most-popular-commands\/#IS_NULL_IS_NOT_NULL\" >IS NULL \/ IS NOT NULL<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/www.iquanta.in\/blog\/sql-commands-cheat-sheet-25-most-popular-commands\/#CASE\" >CASE<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/www.iquanta.in\/blog\/sql-commands-cheat-sheet-25-most-popular-commands\/#LIMIT_TOP\" >LIMIT \/ TOP<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-24\" href=\"https:\/\/www.iquanta.in\/blog\/sql-commands-cheat-sheet-25-most-popular-commands\/#CREATE_INDEX\" >CREATE INDEX<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-25\" href=\"https:\/\/www.iquanta.in\/blog\/sql-commands-cheat-sheet-25-most-popular-commands\/#DROP_INDEX\" >DROP INDEX<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-26\" href=\"https:\/\/www.iquanta.in\/blog\/sql-commands-cheat-sheet-25-most-popular-commands\/#GRANT\" >GRANT<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-27\" href=\"https:\/\/www.iquanta.in\/blog\/sql-commands-cheat-sheet-25-most-popular-commands\/#REVOKE\" >REVOKE<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-28\" href=\"https:\/\/www.iquanta.in\/blog\/sql-commands-cheat-sheet-25-most-popular-commands\/#Why_You_Should_Learn_These_SQL_Commands\" >Why You Should Learn These SQL Commands?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-29\" href=\"https:\/\/www.iquanta.in\/blog\/sql-commands-cheat-sheet-25-most-popular-commands\/#Frequently_Asked_Questions\" >Frequently Asked Questions<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-30\" href=\"https:\/\/www.iquanta.in\/blog\/sql-commands-cheat-sheet-25-most-popular-commands\/#What_is_SQL_and_why_should_I_learn_it\" >What is SQL and why should I learn it?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-31\" href=\"https:\/\/www.iquanta.in\/blog\/sql-commands-cheat-sheet-25-most-popular-commands\/#Is_SQL_hard_to_learn_for_beginners\" >Is SQL hard to learn for beginners?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-32\" href=\"https:\/\/www.iquanta.in\/blog\/sql-commands-cheat-sheet-25-most-popular-commands\/#What_can_I_do_with_SQL_commands\" >What can I do with SQL commands?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-33\" href=\"https:\/\/www.iquanta.in\/blog\/sql-commands-cheat-sheet-25-most-popular-commands\/#Where_can_I_practice_SQL_for_free\" >Where can I practice SQL for free?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-34\" href=\"https:\/\/www.iquanta.in\/blog\/sql-commands-cheat-sheet-25-most-popular-commands\/#Do_I_need_to_be_good_at_math_to_learn_SQL\" >Do I need to be good at math to learn SQL?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-35\" href=\"https:\/\/www.iquanta.in\/blog\/sql-commands-cheat-sheet-25-most-popular-commands\/#How_is_SQL_used_in_real_life\" >How is SQL used in real life?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-36\" href=\"https:\/\/www.iquanta.in\/blog\/sql-commands-cheat-sheet-25-most-popular-commands\/#What_are_some_common_SQL_commands_I_should_know\" >What are some common SQL commands I should know?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-37\" href=\"https:\/\/www.iquanta.in\/blog\/sql-commands-cheat-sheet-25-most-popular-commands\/#Whats_the_difference_between_SQL_and_Excel\" >What\u2019s the difference between SQL and Excel?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-38\" href=\"https:\/\/www.iquanta.in\/blog\/sql-commands-cheat-sheet-25-most-popular-commands\/#How_I_get_a_job_just_by_learning_SQL\" >How I get a job just by learning SQL?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-39\" href=\"https:\/\/www.iquanta.in\/blog\/sql-commands-cheat-sheet-25-most-popular-commands\/#How_long_does_it_take_to_learn_SQL\" >How long does it take to learn SQL?<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-40\" href=\"https:\/\/www.iquanta.in\/blog\/sql-commands-cheat-sheet-25-most-popular-commands\/#Conclusion\" >Conclusion<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\" id=\"h-what-are-sql-commands\"><span class=\"ez-toc-section\" id=\"What_are_SQL_Commands\"><\/span><strong>What are SQL Commands?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>SQL commands are the instructions which are used to interact with the databases. These commands allows users to perform tasks such as retrieving data, update, manage, delete as well as insert the existing records in the relational model.<\/p>\n\n\n\n<p>SQL Commands are generally grouped in to five categories: <\/p>\n\n\n\n<ol>\n<li>DDL (Data Definition Language) \u2013 Define or modify database structures<\/li>\n\n\n\n<li>DML (Data Manipulation Language) \u2013 Manipulate data (insert, update, delete)<\/li>\n\n\n\n<li>DCL (Data Control Language) \u2013 Control access to data<\/li>\n\n\n\n<li>TCL (Transaction Control Language) \u2013 Manage transactions<\/li>\n\n\n\n<li>DQL (Data Query Language) \u2013 Retrieve data<\/li>\n<\/ol>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><a href=\"https:\/\/chat.whatsapp.com\/B6weknl7133BQXjPva0pgB\"><img fetchpriority=\"high\" decoding=\"async\" width=\"864\" height=\"129\" src=\"https:\/\/www.iquanta.in\/blog\/wp-content\/uploads\/2025\/06\/image-120.png\" alt=\"SQL Commands\" class=\"wp-image-51990\" srcset=\"https:\/\/www.iquanta.in\/blog\/wp-content\/uploads\/2025\/06\/image-120.png 864w, https:\/\/www.iquanta.in\/blog\/wp-content\/uploads\/2025\/06\/image-120-300x45.png 300w, https:\/\/www.iquanta.in\/blog\/wp-content\/uploads\/2025\/06\/image-120-768x115.png 768w, https:\/\/www.iquanta.in\/blog\/wp-content\/uploads\/2025\/06\/image-120-150x22.png 150w, https:\/\/www.iquanta.in\/blog\/wp-content\/uploads\/2025\/06\/image-120-696x104.png 696w\" sizes=\"(max-width: 864px) 100vw, 864px\" \/><\/a><\/figure><\/div>\n\n\n<h2 class=\"wp-block-heading\" id=\"h-top-25-most-commonly-used-sql-commands\"><span class=\"ez-toc-section\" id=\"Top_25_Most_Commonly_Used_SQL_Commands\"><\/span><strong>Top 25 Most Commonly Used SQL Commands<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>In this section we will be talking about the top 25 most commonly used SQL commands that we usually cover in databases. <\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-select\"><span class=\"ez-toc-section\" id=\"SELECT\"><\/span><strong>SELECT<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>This SQL command is used to retrieve data from the table. Let us have a look at the basic command syntax.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT * FROM employees;\n<\/code><\/pre>\n\n\n\n<p>employees is the name of the table (database) where you will select records from. <\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-where\"><span class=\"ez-toc-section\" id=\"WHERE\"><\/span><strong>WHERE<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Filter records based on specific conditions.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT * FROM employees WHERE department = 'Sales';\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-insert-into\"><span class=\"ez-toc-section\" id=\"INSERT_INTO\"><\/span><strong>INSERT INTO<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Add new rows to a table.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>INSERT INTO employees (name, role) VALUES ('John Doe', 'Manager');\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-update\"><span class=\"ez-toc-section\" id=\"UPDATE\"><\/span><strong>UPDATE<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Modifying existing records.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>UPDATE employees SET salary = 70000 WHERE id = 1;\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-delete\"><span class=\"ez-toc-section\" id=\"DELETE\"><\/span><strong>DELETE<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Remove records from a table.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>DELETE FROM employees WHERE id = 2;\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-create-table\"><span class=\"ez-toc-section\" id=\"CREATE_TABLE\"><\/span><strong>CREATE TABLE<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>CREATE TABLE employees (\n  id INT PRIMARY KEY,\n  name VARCHAR(100),\n  department VARCHAR(50)\n);\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-alter-table\"><span class=\"ez-toc-section\" id=\"ALTER_TABLE\"><\/span><strong>ALTER TABLE<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Modify an existing table structure.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>ALTER TABLE employees ADD COLUMN hire_date DATE;\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-drop-table\"><span class=\"ez-toc-section\" id=\"DROP_TABLE\"><\/span><strong>DROP TABLE<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Delete an entire table. <\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>DROP TABLE employees;\n<\/code><\/pre>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><a href=\"https:\/\/chat.whatsapp.com\/B6weknl7133BQXjPva0pgB\"><img decoding=\"async\" width=\"864\" height=\"129\" src=\"https:\/\/www.iquanta.in\/blog\/wp-content\/uploads\/2025\/06\/image-135.png\" alt=\"\" class=\"wp-image-52080\" srcset=\"https:\/\/www.iquanta.in\/blog\/wp-content\/uploads\/2025\/06\/image-135.png 864w, https:\/\/www.iquanta.in\/blog\/wp-content\/uploads\/2025\/06\/image-135-300x45.png 300w, https:\/\/www.iquanta.in\/blog\/wp-content\/uploads\/2025\/06\/image-135-768x115.png 768w, https:\/\/www.iquanta.in\/blog\/wp-content\/uploads\/2025\/06\/image-135-150x22.png 150w, https:\/\/www.iquanta.in\/blog\/wp-content\/uploads\/2025\/06\/image-135-696x104.png 696w\" sizes=\"(max-width: 864px) 100vw, 864px\" \/><\/a><\/figure><\/div>\n\n\n<h3 class=\"wp-block-heading\" id=\"h-truncate-table\"><span class=\"ez-toc-section\" id=\"TRUNCATE_TABLE\"><\/span><strong>TRUNCATE TABLE<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Remove all records from a table without logging each row deletion.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>TRUNCATE TABLE employees;\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-join\"><span class=\"ez-toc-section\" id=\"JOIN\"><\/span><strong>JOIN<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Combine rows from two or more tables.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT a.name, b.salary \nFROM employees a \nJOIN salaries b ON a.id = b.employee_id;\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-group-by\"><span class=\"ez-toc-section\" id=\"GROUP_BY\"><\/span><strong>GROUP BY<\/strong><br><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Group rows that have the same values in specified columns.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT department, COUNT(*) \nFROM employees \nGROUP BY department;\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-order-by\"><span class=\"ez-toc-section\" id=\"ORDER_BY\"><\/span><strong>ORDER BY<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Sort the result set. <\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT * FROM employees ORDER BY salary DESC;\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-having\"><span class=\"ez-toc-section\" id=\"HAVING\"><\/span><strong>HAVING<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Filter groups based on aggregate functions.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT department, COUNT(*) \nFROM employees \nGROUP BY department \nHAVING COUNT(*) &gt; 5;\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-distinct\"><span class=\"ez-toc-section\" id=\"DISTINCT\"><\/span><strong>DISTINCT<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>This SQL commands returns only unique values. <\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT DISTINCT department FROM employees;\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-union\"><span class=\"ez-toc-section\" id=\"UNION\"><\/span><strong>UNION<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>This SQL Command combines queries of the two given values.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT name FROM employees_2023\nUNION\nSELECT name FROM employees_2024;\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-like\"><span class=\"ez-toc-section\" id=\"LIKE\"><\/span><strong>LIKE<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>This command searches for a pattern. <\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT * FROM employees WHERE name LIKE 'J%';\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-in\"><span class=\"ez-toc-section\" id=\"IN\"><\/span><strong>IN<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Checks if a value exists in a list.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT * FROM employees WHERE department IN ('HR', 'Sales');\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-between\"><span class=\"ez-toc-section\" id=\"BETWEEN\"><\/span><strong>BETWEEN<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Filter a range of values.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT * FROM employees WHERE salary BETWEEN 40000 AND 80000;\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-is-null-is-not-null\"><span class=\"ez-toc-section\" id=\"IS_NULL_IS_NOT_NULL\"><\/span><strong>IS NULL \/ IS NOT NULL<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>This command checks for the null values.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT * FROM employees WHERE hire_date IS NULL;\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-case\"><span class=\"ez-toc-section\" id=\"CASE\"><\/span><strong>CASE<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT name, \n  CASE \n    WHEN salary &gt; 60000 THEN 'High' \n    ELSE 'Low' \n  END AS salary_bracket \nFROM employees;\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-limit-top\"><span class=\"ez-toc-section\" id=\"LIMIT_TOP\"><\/span><strong>LIMIT \/ TOP<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT * FROM employees LIMIT 5;\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-create-index\"><span class=\"ez-toc-section\" id=\"CREATE_INDEX\"><\/span><strong>CREATE INDEX<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>CREATE INDEX idx_name ON employees(name);\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-drop-index\"><span class=\"ez-toc-section\" id=\"DROP_INDEX\"><\/span><strong>DROP INDEX<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>DROP INDEX idx_name;\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-grant\"><span class=\"ez-toc-section\" id=\"GRANT\"><\/span><strong>GRANT<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>GRANT SELECT ON employees TO user_name;\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-revoke\"><span class=\"ez-toc-section\" id=\"REVOKE\"><\/span><strong>REVOKE<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>REVOKE SELECT ON employees FROM s;<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-why-you-should-learn-these-sql-commands\"><span class=\"ez-toc-section\" id=\"Why_You_Should_Learn_These_SQL_Commands\"><\/span><strong>Why You Should Learn These SQL Commands?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Learning SQL commands is essential for anyone working with data, whether you are a developer, data analyst, or aspiring data scientist. These commands form the foundation for interacting with relational databases allowing you to retrieve, insert, update, and manage data efficiently. Mastering SQL not only enhances your ability to work with popular database systems like MySQL, PostgreSQL, and SQL Server but also opens up opportunities in high-demand fields like <a href=\"https:\/\/www.iquanta.in\/blog\/what-is-data-analytics-a-complete-guide\/\">data analytics<\/a>, business intelligence, and backend development.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><a href=\"https:\/\/chat.whatsapp.com\/B6weknl7133BQXjPva0pgB\"><img decoding=\"async\" width=\"864\" height=\"129\" src=\"https:\/\/www.iquanta.in\/blog\/wp-content\/uploads\/2025\/06\/image-136.png\" alt=\"\" class=\"wp-image-52081\" srcset=\"https:\/\/www.iquanta.in\/blog\/wp-content\/uploads\/2025\/06\/image-136.png 864w, https:\/\/www.iquanta.in\/blog\/wp-content\/uploads\/2025\/06\/image-136-300x45.png 300w, https:\/\/www.iquanta.in\/blog\/wp-content\/uploads\/2025\/06\/image-136-768x115.png 768w, https:\/\/www.iquanta.in\/blog\/wp-content\/uploads\/2025\/06\/image-136-150x22.png 150w, https:\/\/www.iquanta.in\/blog\/wp-content\/uploads\/2025\/06\/image-136-696x104.png 696w\" sizes=\"(max-width: 864px) 100vw, 864px\" \/><\/a><\/figure><\/div>\n\n\n<p>By understanding the most commonly used commands, you will be able to write efficient queries, generate reports, and handle real-world datasets with ease. SQL is also widely used in technical interviews and assessments, making it a must-have skill for landing your next role. Whether you are automating reports or building data-driven applications, learning these essential SQL commands will empower you to work smarter and faster with data making you a valuable asset in any data-focused team.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-frequently-asked-questions\"><span class=\"ez-toc-section\" id=\"Frequently_Asked_Questions\"><\/span><strong>Frequently Asked Questions<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_is_SQL_and_why_should_I_learn_it\"><\/span><strong>What is SQL and why should I learn it?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>SQL stands for Structured Query Language. It\u2019s like a special language we use to talk to databases. Think of a database as a big storage room full of information (like names, numbers, dates), and SQL is how we ask questions or give instructions to that room. You should learn it because almost every company that deals with data uses SQL, and it helps you get the exact info you need, fast and easy.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Is_SQL_hard_to_learn_for_beginners\"><\/span><strong>Is SQL hard to learn for beginners?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Not at all, SQL is actually one of the easiest languages to start with. The commands are like English sentences. For example, if you want to get all the data from a table, you just write: SELECT * FROM table_name;. With a little bit of practice, you will get the hang of it quickly.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_can_I_do_with_SQL_commands\"><\/span><strong>What can I do with SQL commands?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>With SQL commands, you can do a lot of things like find data, add new data, update old data, delete things, sort data, and group it too. Basically, if your data is sitting in a database, SQL helps you manage it in the smartest way possible.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Where_can_I_practice_SQL_for_free\"><\/span><strong>Where can I practice SQL for free?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>There are lots of free websites where you can practice SQL. Some of the best ones are W3Schools, SQLBolt, Mode Analytics, and LeetCode. These platforms have online editors where you can write SQL and see the results immediately without downloading anything.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Do_I_need_to_be_good_at_math_to_learn_SQL\"><\/span><strong>Do I need to be good at math to learn SQL?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Nope! SQL isn\u2019t about solving math problems. It\u2019s more about organizing and reading data. If you can understand simple logic and follow steps, you can learn SQL easily. You don\u2019t need to be a math genius at all.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_is_SQL_used_in_real_life\"><\/span><strong>How is SQL used in real life?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>SQL is used almost everywhere. For example, when you search for a product on Amazon or check your account details in a bank app, SQL is working in the background to get that data for you. Companies use SQL to see reports, check sales, find customer data, and much more.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_are_some_common_SQL_commands_I_should_know\"><\/span><strong>What are some common SQL commands I should know?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Some of the most useful commands are:<\/p>\n\n\n\n<ul>\n<li>SELECT (to get data)<\/li>\n\n\n\n<li>INSERT (to add data)<\/li>\n\n\n\n<li>UPDATE (to change data)<\/li>\n\n\n\n<li>DELETE (to remove data)<\/li>\n\n\n\n<li>JOIN (to connect two tables)<br>These commands help you do most of the daily work with databases.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Whats_the_difference_between_SQL_and_Excel\"><\/span><strong>What\u2019s the difference between SQL and Excel?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Excel is good for small data and visual stuff like charts, but SQL is better when you\u2019re working with huge amounts of data. SQL is faster, more accurate, and can handle millions of rows. Plus, SQL can connect with big databases that Excel just can\u2019t manage well.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_I_get_a_job_just_by_learning_SQL\"><\/span><strong>How I get a job just by learning SQL?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Yes, many jobs need basic SQL knowledge. Roles like data analyst, business analyst, backend developer, or even customer insights teams all need people who can write SQL. If you combine SQL with tools like Excel, Python, or Power BI, you\u2019ll be even more job-ready.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_long_does_it_take_to_learn_SQL\"><\/span><strong>How long does it take to learn SQL?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>If you practice a little every day, you can learn the basics of SQL in a week or two. To get really good, it might take a month or so. But the good part is once you know the basics, the rest becomes super easy.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-conclusion\"><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span><strong>Conclusion<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>In the dynamic and ever evolving field of data science, behavioral and HR interviews play a pivotal role in evaluating not only a candidate\u2019s technical competence but also their ability to work in diverse teams, handle ambiguity, and communicate effectively. <\/p>\n\n\n\n<p>Preparing for these interviews by reflecting on personal experiences, understanding the company\u2019s culture, and articulating your goals clearly can set you apart from other candidates. By showcasing both your soft skills and your passion for data, you position yourself as a well-rounded professional ready to contribute meaningfully to any data-driven organization.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Whether you are an experienced developer or a fresher it is very essential to learn SQL commands to work with databases easily. Structured Query Language (SQL) is the standard and popular language to manage multiple relational databases. If I&#8217;m talking about various job roles whether it is Data Analyst, Business Analyst and some other data [&hellip;]<\/p>\n","protected":false},"author":560,"featured_media":52072,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1074,1073],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.4 (Yoast SEO v21.9.1) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>SQL Commands Cheat Sheet: 25 Most Popular Commands - iQuanta<\/title>\n<meta name=\"description\" content=\"Master the most essential SQL commands with this easy to follow cheat sheet. Learn the top 25 SQL commands used by developers.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.iquanta.in\/blog\/sql-commands-cheat-sheet-25-most-popular-commands\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"SQL Commands Cheat Sheet: 25 Most Popular Commands\" \/>\n<meta property=\"og:description\" content=\"Master the most essential SQL commands with this easy to follow cheat sheet. 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