Question

我有一个非常简单的提交表：userId，submissionGuid

我想在表格中选择包含10个以上提交内容的所有用户的用户名（简单的内部联接来获取）。

我会使用嵌入式查询和分组来计算提交内容......但是有更好的方法吗（没有嵌入式查询）？

谢谢！

Answer 1

这是最简单的方法，我相信：

select userId
from submission   
group by userId
having count(submissionGuid) > 10

Answer 2

select userId, count(*)
from   submissions
having count(*) > 10
group by userId

Answer 3

SELECT 
    username 
FROM 
    usertable 
    JOIN submissions 
        ON usertable.userid = submissions.userid 
GROUP BY 
    usertable.username 
HAVING 
    Count(*) > 1

*假设您的“用户”表是呼叫使用的，并且它有一个名为“UserName”的列

Answer 4

我认为正确的查询是这个（SQL Server）：

SELECT s.userId, u.userName
FROM submission s INNER JOIN users u on u.userId = s.userId   
GROUP BY s.userId, u.username
HAVING COUNT(submissionGuid) > 10

如果您没有HAVING条款：

SELECT u.userId, u.userName
FROM users u INNER JOIN (
    SELECT userId, COUNT(submissionGuid) AS cnt
    FROM submission
    GROUP BY userId ) sc ON sc.userId = u.userId
WHERE sc.cnt > 10

Answer 5

选择userid，count（submissionGUID）为submitCount

来自提交的

按用户ID分组，submitCount

拥有submitCount＆gt; 10

如何选择提交超过10个提交的所有用户

5 个答案: