1.幾個簡單的基本的sql語句 ...
1.幾個簡單的基本的sql語句
選擇:
select * from table1 where 範圍
插入:
insert into table1(field1,field2) values(value1,value2)
刪除:
delete from table1 where 範圍
更新:
update table1 set field1=value1 where 範圍
查找:
select * from table1 where field1 like ’%value1%’ ---like的語法很精妙,查資料!
排序:
select * from table1 order by field1,field2 [desc]
總數:
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