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What are the types of SQL Queries ?
We have four types of SQL Queries:
- DDL (Data Definition Language): the creation of objects
- DML (Data Manipulation Language): manipulation of data
- DCL (Data Control Language): assignment and removal of permissions
- TCL (Transaction Control Language): saving and restoring changes to a database
Let’s look at the different commands under DDL:
| Command | Description |
| CREATE | Create objects in the database |
| ALTER | Alters the structure of the database object |
| DROP | Delete objects from the database |
| TRUNCATE | Remove all records from a table permanently |
| COMMENT | Add comments to the data dictionary |
| RENAME | Rename an object |
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