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The purpose of this article is to share with you about the DML operations in SQL. The editor thinks it is very practical, so share it with you as a reference and follow the editor to have a look.

1. SQL language classification

DQL:select

DML: add, delete, change, merge

DCL:grant revoke

DDL:create drop alter truncate

TCL: transaction control language

2. INSERT insertion

Basic syntax, null values, sysdate functions, insertion techniques

3. UPDATE update

Basic syntax, null value, multi-column value update

4. Delete DELETE

Delete from emp where deptno=10

5. MERGE merger

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