Question

需要您的SQL帮助。我跟着表：

USERID  RuleID
1        101 
1        102
1        103 
2        101 
2        103
3        101
3        102

我想获得存在RuleID 102的所有用户ID，但是没有规则101和103.例如在上面的示例中，它应该返回UserID 3 ..

任何帮助将不胜感激

Answer 1

此查询将返回仅具有102而不包含其他内容的用户ID

select userid
from mytable
group by userid
having count(case when ruleid <> 102 then 1 end) = 0

如果您只想要包含102但不包含101和103

的行

SELECT USERID
FROM yourTable
GROUP BY USERID
HAVING
(
    COUNT(CASE WHEN RuleID = 101 THEN 1 END) = 0 OR
    COUNT(CASE WHEN RuleID = 103 THEN 1 END) = 0
) 
    AND COUNT(CASE WHEN RuleID = 102 THEN 1 END) > 0

以下是第二个查询的运行演示的链接：

SQLFiddle

Answer 2

SELECT userid
FROM sometable
WHERE RuleID = 101 
AND userid NOT IN (SELECT userid FROM sometable WHERE RuleID IN (102, 103))

SQL：检查列是否包含任何给定值

2 个答案: