sql 语句

以下两条语句是相等的：
insert into t_user(id,name,sex)values(4,'andy',2),(5,'andy',2);
insert into t_user values(4,'andy',2),(5,'andy',2);


numerics小数  MONEY 钱    Date  Time  dateTime


left join     right join  full join

SET AUTOCOMMIT ON；

insert into t select * from t2