Save this SQL Commands Cheatsheet.#sql #mysql #database #datascience #bigdata #programming #coding

Save this SQL Commands Cheatsheet.#sql #mysql #database #datascience #bigdata #programming #coding
Save this SQL Commands Cheatsheet

Understanding the core categories of SQL commands is essential for mastering database management and data analysis.

Whether you’re defining the structure of your database, controlling transactions, querying data, or managing access, each SQL command plays a critical role.

Let’s break down these commands and functions to see how they empower you to interact with your database efficiently.

1. DDL (Data Definition Language): Commands to define and manage the structure of database objects.

2. TCL (Transaction Control Language): Commands to manage transactions in the database.

3. DQL (Data Query Language): Commands to query and retrieve data from the database.

4. DCL (Data Control Language): Commands to control access to data within the database.

5. DML (Data Manipulation Language): Commands to manipulate data stored in the database.

Functions

Aggregate Functions: Functions that perform calculations on a set of values and return a single value (e.g., SUM, AVG, COUNT).

Window Functions: Functions that perform calculations across a set of table rows that are related to the current row, without collapsing the result into a single value (e.g., ROW_NUMBER, RANK, LEAD).

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