SQL is the acronym for Structured Query Statement. SQL is the database language through which communication with the Oracle server can be achieved. Can perform operations such as CRUD.
Note: CRUD refers to Create (add), Retrieve (retrieval), Update (modify), Delete (delete)
SQL classification:
DDL: Data Definition Language, used to define tables, columns, etc. For example: create: create, modify: alter, delete: drop
DML: Data manipulation language, used to define database record data and operations such as: add data: add, modify data: update, delete data: delete
DQL: Data query language, used to query record data such as: query data
DTL: Data transaction language, used to operate transactions such as: transaction submission: commit
transaction rollback: rollback
DCL: Data Control Language, used to operate users and permissions, such as creating users and authorizing