SQL選擇頂部查詢

Question

大家好，我有以下查詢：

   SELECT TOP(1) CommitmentLog.CommitAmt
FROM   leveldetails
       INNER JOIN CommitmentLog
               ON leveldetails.App_ID = CommitmentLog.app_id
                  AND leveldetails.Intro_ID = '999'
                  AND leveldetails.Side = 'right'
                  AND CommitmentLog.flag != '1'
                  AND CommitmentLog.CommitNo NOT IN (SELECT commit_no
                                                     FROM   binary_bal
                                                     WHERE  Intro_ID = '999'
                                                            AND Side = 'right'
                                                            AND llevel BETWEEN 1 AND 100000) 

第一行CommitAmt值：1500
第二行CommitAmt值：500
如果我選擇CommitmentLog.CommitAmt的前1個總和，則返回值為2000而不是1500
如果我選擇CommitmentLog.CommitAmt的前2個總和，則返回正確的返回值2000

如果我選擇前1，則sum（CommitmentLog.CommitAmt）應該返回1500，
如果我選擇前2個，則sum（CommitmentLog.CommitAmt）應該返回1500 + 500 = 2000

Answer 1

您想對結果集的前N個求和？ 嘗試這個

SELECT SUM(t1.CommitAmt) from (SELECT TOP(1) CommitmentLog.CommitAmt
                                  FROM   leveldetails
                                    INNER JOIN CommitmentLog
                                      ON leveldetails.App_ID = CommitmentLog.app_id
                                      AND leveldetails.Intro_ID = '999'
                                      AND leveldetails.Side = 'right'
                                      AND CommitmentLog.flag != '1'
                                      AND CommitmentLog.CommitNo NOT IN (SELECT commit_no
                                                     FROM   binary_bal
                                                     WHERE  Intro_ID = '999'
                                                            AND Side = 'right'
                                                            AND llevel BETWEEN 1 AND 100000)
                              ) AS t1