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 SQL stands for Structured Query Language. It is the most common tool used to manipulate and manage data in a relational database (often referred to as a "SQL database").
 
 SQL is commonly pronounced "sequel." Its most popular variants are MySQL, PostgreSQL, and SQLite - a version of SQL which is commonly used for prototyping. It introduced the concept of accessing many records with one single command, using SQL Queries.
+
+### SQL can be divided into three parts:
+
+1. The Data Manipulation Language (DML) is for working with the database tables.  
+2. The Data Definition Language (DDL) is for working with the data in the tables.  
+3. The Data Control Language (DCL) is for access control to the database.