只有一次或多次出現使用內部連接的記錄

Question

我有以下查詢。

select 
dsccnf.Id cnfRptClmId,dsccnf.tblRptcatId cnfRptcatId,dsccnf.Category cnfCategory, 
dsccnf.ClmNumber cnfNumber,dsccnf.State cnfState 
from tblClmPeriod dcp 
inner join tblRptClm dsccnf on dsccnf.tblClmPeriodId = dcp.Id and dsccnf.State=3 --and dsccnf.tblClmPeriodId = 10288 

|cnfRptClmId|cnfRptcatId|cnfCategory|cnfNumber|cnfState 
|21341  |1650  |L2   |A  | 3 
|21343  |1652  |L2   |A  | 3 
|21345  |1657  |T1   |A  | 3 
|21347  |1660  |T2   |B  | 3 
|21356  |1670  |T1   |A  | 3 

獲取以上數據，現在我只是想獲得的所有項目（cnfRptClmId，cnfCategory | cnfNumber | cnfState） 一）一類或單一類型的分類加ClmNumber列（T2 | B），即（| 21347 | 1660 | T2 | b | 3）和類似的記錄

b）中的所有記錄中出現的唯一的兩倍，而忽略其餘即

|21341|1650|L2|A|3 
|21343|1652|L2|A|3 
|21345|1657|T1|A|3 
|21356|1670|T1|A|3 

我可以得到兩種單獨的查詢爲這兩個結果。預先感謝。

Answer 1

SELECT * 
FROM 
(
    SELECT 
     dsccnf.Id cnfRptClmId, 
     dsccnf.tblRptcatId cnfRptcatId, 
     dsccnf.Category cnfCategory, 
     dsccnf.ClmNumber cnfNumber, 
     dsccnf.State cnfState, 
     COUNT(dsccnf.Category) OVER (PARTITION BY dsccnf.Category) categoryCount 
    FROM 
     tblClmPeriod dcp 
     INNER JOIN tblRptClm dsccnf ON dsccnf.tblClmPeriodId = dcp.Id 
             AND dsccnf.State = 3 
) 
WHERE categoryCount = 2 

COUNT(dsccnf.Category) OVER (PARTITION BY dsccnf.Category)會給你爲dsccnf.Category上每一行的數量，所以你只是包裝在一個子查詢並僅選擇有基於下面的評論類別數= 2

的記錄。 。您可以爲dsccnf.Category和dsccnf.ClmNumber添加另一個計數，然後檢查該計數是否要過濾它。

SELECT * 
FROM 
(
    SELECT 
     dsccnf.Id cnfRptClmId, 
     dsccnf.tblRptcatId cnfRptcatId, 
     dsccnf.Category cnfCategory, 
     dsccnf.ClmNumber cnfNumber, 
     dsccnf.State cnfState, 
     COUNT(dsccnf.Category) OVER (PARTITION BY dsccnf.Category) categoryCount, 
     COUNT(dsccnf.Category) OVER (PARTITION BY dsccnf.Category, dsccnf.ClmNumber) categoryClmCount 
    FROM 
     tblClmPeriod dcp 
     INNER JOIN tblRptClm dsccnf ON dsccnf.tblClmPeriodId = dcp.Id 
             AND dsccnf.State = 3 
) 
WHERE categoryCount = 2 -- where category appears twice 
     OR categoryClmCount = 1 -- where category/clm appear only once 

Answer 2

試試這個：

select 
    dsccnf.Id   cnfRptClmId, 
    dsccnf.tblRptcatId cnfRptcatId, 
    dsccnf.Category cnfCategory, 
    dsccnf.ClmNumber cnfNumber, 
    dsccnf.State  cnfState 
from tblClmPeriod dcp 
inner join tblRptClm dsccnf on dsccnf.tblClmPeriodId = dcp.Id 
          and dsccnf.State=3 
group by 
    dsccnf.Id, 
    dsccnf.tblRptcatId, 
    dsccnf.Category, 
    dsccnf.ClmNumber, 
    dsccnf.State 
having count(*) = 2