What is the difference between SQL DML and DQL?

What is the difference between SQL DML and DQL?

SQL DML (Data Manipulation Language) is used for managing data within schema objects, while SQL DQL (Data Query Language) is used for querying data. DML includes commands like INSERT, UPDATE, and DELETE, whereas DQL primarily consists of the SELECT statement.

Can you give me examples of DML and DQL commands?

Sure! An example of a DML command is INSERT INTO users (name, age) VALUES ('Alice', 30);. An example of a DQL command is SELECT * FROM users; which retrieves all records from the users table.

When would I use DML over DQL?

You would use DML when you need to modify the data in your database, such as adding new records or updating existing ones. DQL is used when you want to retrieve or query data without making any changes.

Are there any other types of SQL commands?

Yes, besides DML and DQL, there are also DDL (Data Definition Language) for defining database structures, and DCL (Data Control Language) for controlling access to data.