從另一個sql server中出現的一個表中篩選行

Question

我試圖在SQL Server 2005中執行篩選操作。

示例。假設我們有兩個表格Current和Reject。

Current = 1, 2, 3, 4, 5, 1, 2 
Reject = 2, 3, 4 

Current \ Reject = 1, 2, 5 

正如您所看到的，這兩個表共享值。我基本上只是想減去這些共享值並將它們放到一個新表中。

這是我試過的，但沒有奏效。 （A是匹配的列）。

select * from Current left join 
       Reject on csrp.a = rp.a 
     group by Current.a, Reject.a 
     having count(Current.a) > count(Reject.a) 

請注意，元素2被過濾掉了，即使它本來不應該。

馬丁·史密斯的回答工作了這種情況！

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編輯

好了，讓我們更加有點複雜。假設我和以前的情況完全相同，除了這次我需要匹配三列而不是一列嗎？

Current = (1, 2, 3), (2, 3, 4), (2, 3, 4), (4, 5, 6), (7, 8, 9), (1, 2, 3) 
Reject = (2, 3, 4), (4, 5, 6), (7, 8, 9) 

Current \ Reject = (1, 2, 3), (2, 3, 4) 

Answer 1

WITH [Current](a, b, c) 
    AS (SELECT 1, 2, 3 UNION ALL 
     SELECT 2, 3, 4 UNION ALL 
     SELECT 2, 3, 4 UNION ALL 
     SELECT 4, 5, 6 UNION ALL 
     SELECT 7, 8, 9 UNION ALL 
     SELECT 1, 2, 3), 
    Reject(a, b, c) 
    AS (SELECT 2, 3, 4 UNION ALL 
     SELECT 4, 5, 6 UNION ALL 
     SELECT 7, 8, 9), 
    T(RN, a, b, c) 
    AS (SELECT ROW_NUMBER() OVER (PARTITION BY a, b, c ORDER BY (SELECT 0)), 
       a, 
       b, 
       c 
     FROM [Current] 
     EXCEPT 
     SELECT ROW_NUMBER() OVER (PARTITION BY a, b, c ORDER BY (SELECT 0)), 
       a, 
       b, 
       c 
     FROM Reject) 
SELECT DISTINCT a, 
       b, 
       c 
FROM T