SQL學習筆記

1.排序

SELECT  a.*  FROM  table1 a  ORDER BY  fiedle1,fiedle2 [desc]

eg: SELECT a.* FROM goods_basic a ORDER BY a.IS_SUPPORT_7RETURN, a.ADD_TIME DESC;

2.高級查詢運算符

insert into users(userid,username,userpss) select  * from users