项目中用的一直是hhs,所以很少接触sql语句,闲来无事就总结一下平时常用的sql语句:
1、关键字:create update alter drop insert exec select declare open fetch close if while case when where union
max avg min data as group by order by having
2、简单查询
select * from table
条件查询
select * from table where
字表查询
select a.field1 ,b.field1 from table1 a,table2 b where a.id=b.name
分组查询
select Name ,max(column) from table group by Name union view
3、组合查询