如何在SELECT查询中的两个不同表中获得两列的区别

Question

I have the two queries below I'd like to combine into one and get a difference result.

Query 1

SELECT SUM(col1 + col2) As total FROM tableA

Query 2

SELECT SUM(total) FROM tableB WHERE color not like '%black' and model not like 'CF%'

I'd like to combine these in a SELECT query and get the result: Query 1 - Query 2 = result. The tables both have a "id" as a common key between them. I'm using MS SQL Server 2008

Answer 1

SELECT  (
        SELECT  SUM(col1 + col2)
        FROM    tableA
        ) -
        (
        SELECT  SUM(total) 
        FROM    tableB
        WHERE   color NOT LIKE '%black'
                AND model NOT LIKE 'CF%'
        ) AS result

Answer 2

Do an outside select with both of your queries as columns.

Something like

SELECT (Query1) - (Query2) as Diff