按多列显示一个表中的记录，该表不在另一个表中

Question

我正在使用SQL Server 2012 Express进行以下查询。

表_A

CLIENT              TYPEOFWORK               ACTIVITY
-----------------------------------------------------
CLIENT A            WORK A                   ACTIVITY A
CLIENT A            WORK B                   ACTIVITY B
CLIENT A            WORK C                   ACTIVITY C
CLIENT A            WORK C                   NULL

表_B

CLIENT               TYPEOFWORK                 STATUS
--------------------------------------------------------
CLIENT A             WORK C                     COMPLETED

我想从显示记录Table_A这是不是在Table_B通过client和typeofwork 。

我需要以下输出。

CLIENT             TYPEOFWORK                 ACTIVITY
------------------------------------------------------
CLIENT A            WORK A                    ACTIVITY A
CLIENT A            WORK B                    ACTIVITY B

我尝试过NOT IN但仅适用于一列

先感谢您

Answer 1

尝试一下 ： NOT EXISTS

这是轻松的完整方案：

CREATE TABLE #table_a(CLIENT VARCHAR(50), TYPEOFWORK VARCHAR(50), ACTIVITY VARCHAR(50))
INSERT INTO #table_a VALUES
('CLIENT A', 'WORK A', 'ACTIVITY A'),
('CLIENT A', 'WORK B', 'ACTIVITY B'),
('CLIENT A', 'WORK C', 'ACTIVITY C'),
('CLIENT A', 'WORK C', NULL)

CREATE TABLE #table_b(CLIENT VARCHAR(50), TYPEOFWORK VARCHAR(50), STATUS VARCHAR(50))
INSERT INTO #table_b values
('CLIENT A', 'WORK C', 'COMPLETED')

SELECT 
    a.client,
    a.typeofwork,
    a.activity
FROM #table_a a
WHERE NOT EXISTS(SELECT 1 FROM #table_b b 
                 WHERE a.client = b.client AND a.typeofwork = b.typeofwork)

输出：

client      typeofwork  activity
----------------------------------
CLIENT A    WORK A      ACTIVITY A
CLIENT A    WORK B      ACTIVITY B

Answer 2

我假设您希望客户端列匹配并且工作类型不相同，对吗？ 如果是这样，您可以按以下方式保留联接条件：

SELECT A.CLIENT, A.TYPEOFWORK, A.STATUS
FROM TABLE_A A
LEFT JOIN TABLE_B B ON B.CLIENT = A.CLIENT AND 
A.TYPEOFWORK <> B.TYPEOFWORK
WHERE B.CLIENT IS NULL

Answer 3

SELECT A.CLIENT, A.TYPEOFWORK, A.ACTIVITY
FROM TABLE_A A
LEFT JOIN TABLE_B B 
ON A.CLIENT = B.CLIENT 
AND A.TYPEOFWORK = B.TYPEOFWORK
WHERE B.CLIENT IS NULL 
OR B.TYPEOFWORK IS NULL;

Answer 4

尝试使用以下查询：

SELECT * FROM Table_A
WHERE 
  NOT EXISTS (
    SELECT * FROM Table_B WHERE CLIENT = Table_A.CLIENT AND TYPEOFWORK = Table_A.TYPEOFWORK
  )

希望它能达到您的目的。 在此处查看演示

Answer 5

尝试这个：

Select * from Table_A 
where Client NOT IN (Select Client from Table_B)
and TypeOFWork NOT IN (Select TypeOfWork from Table_B)

Answer 6

尝试以下方法：

SELECT A.*
FROM TABLE_A A
LEFT JOIN TABLE_B B ON B.CLIENT = A.CLIENT AND A.TYPEOFWORK = B.TYPEOFWORK
WHERE B.[STATUS] IS NULL

谢谢。