1

我有以下表结构：

uid    | product_code
---------------------
00001  | 'tb'
00001  | 'im' 
00001  | 'ip'
00002  | 'tb'
00002  | 'im'

我想要一个 selfjoin 查询，它将向我显示那些具有所有三个产品代码 'mg'、'ip'、'tb' 的 uid。即只显示00001。如何做呢？

4

3 回答 3

2 
SELECT sj1.uid FROM tbl sj1 
    JOIN tbl sj2 ON sj1.uid = sj2.uid 
    JOIN tbl sj3 ON sj1.uid = sj3.uid
WHERE sj1.product_code = 'tb'
    AND sj2.product_code = 'im'
    AND sj3.product_code = 'mg'

如果您有更多产品代码，也应该可以使用。

于 2012-07-09T11:00:55.553 回答
1 
select uid from mytable 
where product_code in ('mg','ip','tb') 
group by uid having count(distinct(product_code))=3;
于 2012-07-09T11:01:26.990 回答
0

如果您只有三个产品代码 Select * from table group by uid having count(uid) =3

于 2012-07-09T10:59:53.540 回答