Mastering SQL: Complete Notes & Query Handbook with Learn AnyOne

Mastering SQL: Complete Notes & Query Handbook (60 Pages)

Master SQL from the ground up or sharpen your query skills with this comprehensive, practical 60-page handbook. Designed for beginner to intermediate developers, data analysts, and tech professionals, this guide breaks down complex database concepts into clear, easy-to-understand notes and actionable query examples.

Here's an index of the topics covered in your SQL notes:

SQL Commands Overview

• Types of SQL commands: DDL, DML, DCL, TCL, DQL

1. DDL (Data Definition Language)

• CREATE, DROP, ALTER, TRUNCATE

2. DML (Data Manipulation Language)

• INSERT, UPDATE, DELETE

3. DCL (Data Control Language)

• GRANT, REVOKE

4. TCL (Transaction Control Language)

• COMMIT, ROLLBACK, SAVEPOINT

5. DQL (Data Query Language)

• SELECT

Core Query Concepts

• CREATE TABLE / DROP TABLE
• INSERT INTO
• SELECT Query & WHERE Clause
• AND / OR Operators
• UPDATE Query
• DELETE Query
• LIKE Clause & Wildcard Operators (%, _)
• TOP / LIMIT / ROWNUM
• ORDER BY Clause
• GROUP BY Clause
• DISTINCT Keyword
• Alias (table & column)

Combining Data

• UNION / UNION ALL
• INTERSECT / EXCEPT (mentioned)
• Joins: INNER, LEFT, RIGHT, FULL, SELF, CARTESIAN (CROSS)

Constraints

• NOT NULL, DEFAULT, UNIQUE, PRIMARY KEY, FOREIGN KEY, CHECK, INDEX
• Adding/dropping constraints via ALTER TABLE

Other Key Topics

• NULL Values (IS NULL / IS NOT NULL)
• ALTER TABLE (add/drop/modify columns)
• TRUNCATE TABLE
• Views (CREATE VIEW, WITH CHECK OPTION, updating/inserting/deleting via views, DROP VIEW)
• Aggregate functions: 2nd/Nth highest & minimum salary queries
• IN Operator
• BETWEEN Operator
• COUNT(), AVG(), SUM(), MIN(), MAX(), FIRST(), LAST()
• HAVING Clause