Sql选择top查询

Question

大家好，我有以下查询：

   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1行CommitAmt值: 1500

第二行CommitAmt值: 500

如果选择CommitmentLog.CommitAmt的前1和，则返回值为2000，而不是1500。

如果选择CommitmentLog.CommitAmt的前2和，返回值为2000，这是正确的。

如果我选择前1，那么和(CommitmentLog.CommitAmt)它应该返回1500和 如果我选择前2，那么sum(CommitmentLog.CommitAmt)应该返回1500 + 500 = 2000

Answer 1

你想把你的结果集的顶部N和起来吗？尝尝这个

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