mysqlÇ󯽾ùÖµµÄÎÊÌ⣬¼±£¡
²ÉÓÃPHP+MYSQL
±í company
userid name status
1 Ìì²Å 1
2 Ó¢ÐÛ 1
3 ¹í²Å 0
±í dp
gid userid sort1 sort2
1 1 4 3
2 2 2 3
3 2 2 1
4 2 3 2
5 2 3 2
Áгö status=1 µÄÇé¿öϱícompanyÖеÄÊý¾Ý²¢¼ÆËã±ídpÖÐuseridÖµÏàͬµÄsort1ºÍsort2µÄƽ¾ùÖµ
name avgsort1 avgsort2
Ìì²Å 4 3
Ó¢ÐÛ 2.5 2
Çë½Ì¸ßÊÖÓÃSQLÓï¾äÔõÑùʵÏÖ°¡£¿£¿£¿
SQL code:
--²âÊÔÊý¾Ý
if Object_id('company') is not null
drop table company
create table company(
id bigint not null,
[name] varchar(50) not null,
state int not null
)
insert into company
select '1','Ìì²Å','1'
union all
select '2','Ó¢ÐÛ','1'
union all
select '3','¹í²Å','0'
if Object_id('dp') is not null
dro
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