Question

有人在我陷入沮丧之前帮助我。

我正在创建一个简单的许可投票系统。收到许可证后，委员会必须批准或拒绝。该委员会由5名成员组成，投票过程基于多数投票（意味着收到的每份申请都需要批准/拒绝3名或更多委员会成员。例如如果有3名或更多成员投票批准该申请据说是“已批准”，如果3个或更多成员投票拒绝，则说该应用程序被“拒绝”）。

这个想法是，总是需要3个多数票才能确定申请的状态。如果委员会的所有成员都没有投票，或者每个地位（批准或拒绝）的投票数少于3，那么申请被视为“等待”例如，如果2名成员批准并且2拒绝 OR 2批准，1拒绝 OR 1批准，2拒绝 OR 1批准，1拒绝 OR 仅限2批准 OR 仅2拒绝

这是其中一个正在处理的表格的结构

CREATE TABLE [CommitteeApproval](
[CommitteeApprovalID] [int] IDENTITY(1,1) NOT NULL,
[LicenceApplicationID] [int] NOT NULL,
[UserID] [int] NOT NULL,
[ActionDate] [date] NULL,
[CommitteeApprovalStatusID] [int] NOT NULL)

[CommissionApproval] 是主键，而 [LicenceApplicationID] ， [CommissionApprovalStatusID] 和 [UserID] 是各自表格的外键。

[CommissionApprovalStatus] 表（CommissionApprovalStatus是主键）

   CommitteeApprovalStatusID      CommitteeApprovalStatusName
    1                             Approve
    2                             Reject

[委员会批准] 表包含

LicenceApplicationID UserID ActionDate  CommitteeApprovalStatusID
4173                  37    2013-12-17         2
4173                  36    2013-12-17         1
4173                  6     2013-12-17         1
4173                  7     2013-12-17         1
4174                  37    2013-12-17         1
4174                  36    2013-12-17         2
4174                  7     2013-12-17         2
4174                  6     2013-12-17         2
4174                  38    2013-12-17         2
4176                  38    2013-12-17         2
4177                  7     2013-12-17         2
4179                  36    2013-12-17         1
4179                  38    2013-12-17         2

我想为每个许可证申请返回CommissionApprovalStatus的数量。 例如：对于LicenceApplication 4174 ，4个成员被拒绝，2个成员被批准，因此该应用程序被称为“被拒绝”

我使用以下查询向用户显示被拒绝的应用程序列表

SELECT LicenceApplicationID ,CommitteeApprovalStatusID ,COUNT(UserID) AS votes
  FROM CommitteeApproval
  WHERE CommitteeApprovalStatusID=2
  GROUP BY LicenceApplicationID, CommitteeApprovalStatusID
  HAVING COUNT(UserID) >= 3

我还成功检索了具有类似查询的已批准查询列表，但替换为

WHERE CommitteeApprovalStatusID=1

现在，当我尝试检索“待处理”应用程序列表时，会出现问题。

我无法捕获2名成员批准，2名成员被拒绝，1名成员获得批准，1名成员被拒绝，2名成员获得批准，1名成员被拒绝，3名成员被拒绝，1名或2名成员获得批准的申请，2成员被拒绝，3名成员获得批准。
我一次只能捕获一种类型的应用程序，例如WHERE委员会批准状态ID = 2或1，而我想捕获所有不符合条件的应用程序。

我写的查询是：

 SELECT LicenceApplicationID, COUNT(UserID) AS votes 
 FROM CommitteeApproval   
 WHERE CommitteeApprovalStatusID=1 
 GROUP BY LicenceApplicationID   
 HAVING COUNT(UserID) < 3

这无济于事我仍然需要用

WHERE CommitteeApprovalStatusID = 2

它仍然无法捕获问题1中的结果。有没有办法用一个查询显示所有“待定”结果？

Answer 1

我的可读性尝试：

WITH votes AS (
  SELECT
    LicenceApplicationID,
    CommitteeApprovalStatusName Vote
  FROM CommitteeApproval A
  INNER JOIN CommitteeApprovalStatus S ON 
    S.CommitteeApprovalStatusID = A.CommitteeApprovalStatusID
)
SELECT
  LicenceApplicationID,
  Approve,
  Reject,
  CASE
    WHEN  Approve >= 3 THEN 'Approved'
    WHEN  Reject  >= 3 THEN 'Rejected'
    ELSE 'Pending'
  END AS VoteStatus
FROM votes
PIVOT(COUNT(Vote) FOR Vote IN (Approve,Reject)) P

Answer 2

试试这个：

 SELECT LicenceApplicationID, COUNT(UserID) AS votes, 
 CASE  WHEN CommitteeApprovalStatusID = 1 THEN 'Aprove' ELSE 'Rejected' END AS Status
 FROM CommitteeApproval   
 WHERE CommitteeApprovalStatusID in (1, 2) 
 GROUP BY LicenceApplicationID, CommitteeApprovalStatusID    
 HAVING COUNT(UserID) < 3

Answer 3

尝试此查询

select 
  * 
from 
  (select 
    LicenceApplicationID,
    sum(case when 
          CommitteeApprovalStatusID=1 then 1 
        else 0 end) as pass,
    sum(case when 
          CommitteeApprovalStatusID=2 then 1 
        else 0 end) as fail
    from 
        tbl
    group by 
        LicenceApplicationID
  )tbl 
where 
  pass < 3 and 
  fail < 3

的 Fiddle

| LICENCEAPPLICATIONID | PASS | FAIL | |----------------------|------|------| | 4176 | 0 | 1 | | 4177 | 0 | 1 | | 4179 | 1 | 1 |

Answer 4

试试这个。

(SELECT LicenceApplicationID, COUNT(UserID) As "Votes"
FROM CommitteeApproval
WHERE CommitteeApprovalStatusID = 2) B

SELECT LicenceApplicationID,
CASE 
WHEN A.Votes > 2 THEN "Approved"
WHEN B.Votes >2 THEN  "Rejected"
ELSE "Pending"

END AS "Status"

FROM 

(SELECT LicenceApplicationID, COUNT(UserID) AS "Votes"
FROM CommitteeApproval
WHERE CommitteeApprovalStatusID = 1
GROUP BY LicenceApplicationID ) A 

FULL OUTER JOIN

(SELECT LicenceApplicationID, COUNT(UserID) AS "Votes"
FROM CommitteeApproval
WHERE CommitteeApprovalStatusID = 2
GROUP BY LicenceApplicationID ) B

ON A.LicenceApplicationID = B.LicenceApplicationID

无法实现T-SQL GROUP BY子句

4 个答案:

的 Fiddle