SQL-带计数的从子句嵌套选择

Question

When I use the following code (it is from an Oracle guy and he says there is no reason for it not to work...) I am notified that there is incorrect syntax located at the last ')'. Any idea how I can change this to be "SQL Appropriate"? My thoughts are that it is not liking the last select statement.

select 
    * 
from 
    CPINInvest 
where 
    [Case ID||] not in 
        (
        select [Case ID||] 
        from 
            (
            select [Case ID||], count(*) 
            from CPINComm140 
            where [Role CD||]='PRI||' 
            group by [Case ID||]   
            having count(*)=1
            )
        )

Answer 1

It can be shortened.

select * from CPINInvest 
where [Case ID||] not in (
        select [Case ID||]
        from CPINComm140 
        where [Role CD||]='PRI||' 
        group by [Case ID||] 
        having count(*)=1
    );

But seriously, pipes in fieldnames? Yuk!

The reason why the original query would fail is:
1) the count(*) needs an alias. For example [total]
2) tsql has that odd requirement that some subqueries require an alias

Answer 2

sql likes you to give aliases to your sub-queries even if they are not used. This will work but @LukStorms shorter version is better.

select * 
from CPINInvest 
where 
    [Case ID||] not in 
        (
        select [Case ID||] 
        from 
            (
            select [Case ID||], count(*) 
            from CPINComm140 
            where [Role CD||]='PRI||' 
            group by [Case ID||]   
            having count(*)=1
            ) x
        ) y

Answer 3

use the below query. You have forgot to add alias to the sub table.

select 
    * 
from 
    CPINInvest 
where 
    [Case ID||] not in 
        (
        select [Case ID||] 
        from 
            (
            select [Case ID||], count(*) 
            from CPINComm140 
            where [Role CD||]='PRI||' 
            group by [Case ID||]   
            having count(*)=1
            )t
        )