Question

I have a table that has account numbers in (account_num) and user profiles (profile_id). There can be multiple instances of the same account number for different profiles, or multiple instances of a profile with different account numbers. (There can’t be multiple instances of a profile with the same account number).

I am trying to write a query that will give me a distinct count of the number of account numbers, that appear in multiple profiles.

I was trying the below query (although recommendation of a more efficient query would be appreciated);

Select Count(*) from
(select account_num, count(profile_id) as num_users
from dbo.sample
where account_num <> ''
group by account_num
)
where num_users >1

But I keep getting the following error;

Msg 156, Level 15, State 1, Line 7
Incorrect syntax near the keyword 'where'.

I am using Microsoft SQL Server Management Studio. As an aside, would this query be different on an Oracle Server?

Any help would be much appreciated.

Answer 1

try aliasing the subquery

 select Count(*) from 
    (   
        select account_num, count(profile_id) as num_users 
        from dbo.sample 
        where account_num <> '' group by account_num
    ) t 
 where num_users > 1