Question

我有一个HTML表，它是从'user'表的查询中生成的，该表查找系统上的所有用户。

第二个查询使用“选择计数”通过检查用户ID在会议桌中出现的次数来计算用户预订的会议次数。

<cfquery datasource="iPad" name="Two">
 SELECT COUNT(userID) AS meetingsCount from meeting where userID = '#One.userID#'
 </cfquery>

我希望能够通过单击页面上的链接根据meetingsCount重新排序表。问题是我不知道如何查询这些信息，因为它在MYSQL中的技术上并不存在。

编辑;使用左连接和验证的代码。

select user.userID, user.contactName, user.email, count(meeting.userID)
as meetingsCount 
 from user where user.userID = 30 
AND user.userID NOT IN ('1', '2', '3', '4', '58', '59', '62',
'63', '64', '66', '69', '71',    '72', '73', '78', '107')
AND SUBSTRING( meeting.meetingCode, 5, 2 ) 
BETWEEN 12 AND 22 
AND SUBSTRING( meeting.meetingCode, 7, 2 ) 
BETWEEN 1 AND 12 
AND SUBSTRING( meeting.meetingCode, 9, 2 ) 
BETWEEN 01 AND 31
left outer join meeting on user.userID = meeting.userID

Answer 1

您应该使用group by

进行一次查询

编辑：我在您的回答中添加了您的where子句，但不是硬编码用户ID来排除您应该考虑将它们分配给角色，以便您可以在一个地方而不是每个查询中管理角色不包括这些人。如果您要求提供单个ID，也不需要not in。我知道你现在只是陷入困境，但要牢记这一点。如果那还不行，我会检查你的子串逻辑。

<cfquery>
    select
          user.userID
        , firstName
        , lastName
        , count(*) as meetingCount
    from
        user
        left outer join meeting on users.userID = meeting.userID
          AND (    SUBSTRING( meeting.meetingCode, 5, 2 ) BETWEEN 12 AND 22 
               AND SUBSTRING( meeting.meetingCode, 7, 2 ) BETWEEN 1 AND 12 
               AND SUBSTRING( meeting.meetingCode, 9, 2 ) BETWEEN 1 AND 31)
      -- the ( ) above are optional but I like them to show groups of like filters
      -- if you don't want to use them feel free not to.
    where 
         user.userID NOT IN (1,2,3,4,5,59,62,63,64,66,69,71,72,73,78,107)     
    group by
          user.userID
        , firstName
        , lastName
    order by
        meetingCount
</cfquery>

我认为MySql允许你通过别名来订购，我记不起来了。如果没有，请将订单更改为count(*)

如何对ColdFusion中循环Mysql查询生成的表进行排序？

1 个答案: