Question

我正在尝试以一种方式过滤查询，以使结果仅显示具有重复值的帐户。就目前而言，我的代码给了我单一和重复的帐户。

这是我当前的查询：

SELECT 
  l.AcctNum,
  l.SymID,
  l.PaymentHistory_1,
  h.postdatetime,
  h.NewCHAR
FROM Loans AS L WITH (nolock)
LEFT JOIN History AS H WITH (nolock) ON l.acctnum = h.acctnum
WHERE l.paymenthistory_1 = '12' 
  AND l.SymID LIKE '0%'  
  AND h.NewCHAR LIKE 'Rate decreased from%' 
ORDER BY l.acctnum

目前，我会看到如下结果：

AcctNum    Sym ID    PaymentHistory    PostDate       New CHAR
123          1           blah           1/1/2000       Rate decreased from
125          1           blah           1/1/2000       Rate decreased from
160          1           blah           1/1/2000       Rate decreased from
160          1           blah           1/1/2000       Rate decreased from

我想看的是这个

AcctNum    Sym ID    PaymentHistory    PostDate       New CHAR
160          1           blah           1/1/2000       Rate decreased from 2 to 1
160          1           blah           1/1/2000       Rate decreased from 3 to 2

Answer 1

您可以尝试：

SELECT AcctNum
     , SymID
     , PaymentHistory_1
     , postdatetime
     , NewCHAR
  FROM (
        SELECT l.AcctNum
             , l.SymID
             , l.PaymentHistory_1
             , h.postdatetime
             , h.NewCHAR
             , COUNT(1) OVER(PARTITION BY l.AcctNum) AS CountAcctNum
          FROM Loans AS L WITH(nolock)
          LEFT JOIN History AS H WITH(nolock) ON l.acctnum = h.acctnum
         WHERE l.paymenthistory_1 = '12'
           AND l.SymID LIKE '0%'
           AND h.NewCHAR LIKE 'Rate decreased from%'
       ) LoansHistory
 WHERE CountAcctNum > 1
 ORDER BY AcctNum

筛选结果以仅显示一列中有重复记录的结果

1 个答案: