基本sql语句
sql语句不区分大小写
--选择:
select * from table1 where 范围
--插入:
insert into table1(field1,field2) values(value1,value2)
--删除:
delete from table1 where 范围
--更新:
update table1 set field1=value1 where 范围
--查找:
select * from table1 where field1 like ’%value1%’ ---like的语法很精妙,查资料!
--排序:
select * from table1 order by field1,field2 [desc]
--总数:
select count as totalcount from table1
--求和:
select sum(field1) as sumvalue from table1
--平均:
select avg(field1) as avgvalue from table1
--最大:
select max(field1) as maxvalue from table1
最小:select min(field1) as minvalue from table1