Question

I have the below sql query:

select @table1 as DataState, *  from
(select * from importedcsvclients 
except 
select * from tblClients) x
union all
select @table2 as DataState, *  from
(select * from tblClients 
except select *  
from importedcsvclients) x

The above code works fine, however, if table1 and table2 consist similar data, both records will show.

Can anyone assist me to make the query work as:

get the results of both table1 and table2, but only show table2 data if the same name doesn’t exist in table1.

Thanks.

For Info:

table1
ID   Name
1    TestA
2    TestB    
3    TestC
4    TestD

table2
ID   Name
1    TestE
2    TestF    
3    TestG
4    TestD

Results:
Name     DataState
TestA    table1
TestB    table1
TestC    table1
TestD    table1
TestE    table2
TestF    table2
TestG    table2

Answer 1

I used the below now.
Thanks for all assistance.

DECLARE @sql VARCHAR(8000)
SET @sql = 'SELECT ''' + @table1 + ''' AS DataState, * FROM
(SELECT ' + @columnlist + ' FROM ' + @table1 + '
    EXCEPT
SELECT ' + @columnlist + ' FROM ' + @table2 + ') x
    UNION
SELECT ''' + @table2 + ''' AS DataState, * from
    (SELECT ' + @columnlist + ' FROM ' + @table2 + '
        INTERSECT
    SELECT ' + @columnlist + ' FROM ' + @table1 +') x'

EXEC(@sql)