Question

   ID       ATTRID    VALSTR   
1771373       1         1234  
1771373       3         510 
1771373       7         2016
1771373       8         05
1777623       3         5003 
1777623       7         2016 
1777623       8         05
1778103       3         520
1778103       7         2016
1778103       8         06

我想只选择三个条件

AttrId = 3 AND ValStr = 510 
AttrId = 7 AND ValStr = 2016
AttrId = 8 AND ValStr = 05

我的查询是这样的，但查询返回所有ID

SELECT *
FROM Table
WHERE ((AttrID = 3 AND ValStr ='510') OR
       (AttrID = 7 AND ValStr ='2016')  OR
       (AttrID = 8 AND ValStr ='05')
      ) AND
      DefID = 1375552

我想显示提供所有三个条件的结果。对于我的例子;我应该显示1771373 id但没有调节任何id。你能帮我吗？

Answer 1

您可以使用HAVING子句。

此查询将使用仅包含ID的派生表来回答所有三个条件：

SELECT t.* FROM YourTable t
INNER JOIN(SELECT s.Id FROM YourTable s
           WHERE (s.AttrID = 3 AND s.ValStr ='510') OR
                 (s.AttrID = 7 AND s.ValStr ='2016')  OR
                 (s.AttrID = 8 AND s.ValStr ='05')
           GROUP BY s.Id
           HAVING COUNT(distinct s.AttrID) = 3) t2
 ON(t.id = t2.id)

Answer 2

试试这个，

select id from YourTable
where ((AttrID = 3 AND ValStr ='510') OR
       (AttrID = 7 AND ValStr ='2016')  OR
       (AttrID = 8 AND ValStr ='05')
      ) 
group by id having count(*)=3

如何编写提供所有三个条件的选择查询？

2 个答案: