如何计算一组的最大值？

Question

我需要一个命令，可以从作者中挑选出最多的积极问题，例如，结果应如下所示：

Author     WithTheMostMax
Author1                2

AUTHOR TABLE

AuthorID    AuthorName
Author1    AuthorName1
Author2    AuthorName2
Author3    AuthorName3

问题列表

AuthorID    Issues
Author1          1
Author2          0
Author3          0
Author1          1

Answer 1

SELECT AuthorName, SUM(Issues) AS WithTheMostMax FROM issues_list INNER JOIN issues_list.AuthorID = author_table.AuthorID
GROUP BY AuthorName ORDER BY SUM(Issues) DESC

Answer 2

如果问题表中的每一行都存储了每个作者1个问题，则可以使用Entity Framework to 6.0。

count()

http://sqlfiddle.com/#!9/bbb79/2