MySQL basic operation "MySQL"

MySQL basic Operation 1.mysql table copy MySQL table structure replication

CREATE table t2 like T2

Replication of MySQL table data

INSERT INTO T2 select * from t1

Operation of the 2.mysql index

2.1 Increase of the index

ALTER TABLE Tb_name Add index index_name (column name)

ALTER TABLE Tb_name add unique (column name)

ALTER TABLE Tb_name add primary key (column name)

2.2 Increase of the index

Create INDEX index_name on tb_name (column name)

2.3 Deletion of the index

ALTER TABLE Tb_name DROP INDEX Index_name

ALTER TABLE Tb_name DROP INDEX name (unique)

ALTER TABLE tb_name drop PRIMARY key

Operation of the 3.mysql view

The MySQL view is an intermediate table created by the condition, and the data changes with the condition

3.1 Increase in views

Create VIEW view_name as condition (SELECT * from T1 where id>5)

3.2 Deletion of views

Drop View View_name

MySQL basic operation "MySQL"