如何从表A中选择所有行，其中表B中的两个相关列与表A中的相关列相同

Question

Here is an example row found in both tableA and TableB:

 col1   col2    col3
123  |  asdf  |  ddd

I was going to try to use a CTE To retrieve this value, but i have only got it to work with one column at a time.

Here is what i have so far, but right now I am stumped.

    ;with cte as (
     SELECT  A.col1
          ,A.col2
      FROM tableA A
        )

    select col1, col2 from cte where col1, col2

    not in (select col1, col2 from FHU.dbo.HolidayCallers)

And just to reiterate i am expecting output to be the original sample row up top.

Answer 1

Based on your question, you'd could use EXISTS to find rows where the related columns are in both tables.

SELECT a.ConversationID, a.SendDateUtc
    FROM tableA a
    WHERE EXISTS(SELECT NULL
                     FROM FHU.HolidayCallers hc
                     WHERE a.ConversationID = hc.ConversationID
                         AND a.SendDateUtc = hc.SendDateUtc);

BUT, based on the sample code you provided, it seems like you are looking for a NOT EXISTS condition:

SELECT a.ConversationID, a.SendDateUtc
    FROM tableA a
    WHERE NOT EXISTS(SELECT NULL
                         FROM FHU.HolidayCallers hc
                         WHERE a.ConversationID = hc.ConversationID
                             AND a.SendDateUtc = hc.SendDateUtc);

Answer 2

You can use an INNER JOIN to find records that are in both tables:

SELECT a.ConversationID, a.SendDateUtc
FROM tableA AS a
INNER JOIN FHU.dbo.HolicayCallers AS hc ON a.ConversationId = hc.ConversationId
   AND a.SendDateUtc = hc.SendDateUtc