Question

I am trying to inlude the total count as a column in the query:

SELECT un.user, un.role
FROM [Unique] un group by user, role;

In this query I have 2 columns but I want to add a third column as the total rows calculated in the above query.

Answer 1

This works under MS Access (and is very similar to what would work under Oracle and other databases):

SELECT
    un.user,
    un.role,
    (
        SELECT COUNT(*)
        FROM (
            SELECT un1.user, un1.role
            FROM [Unique] un1 group by user, role
        )
    )
FROM [Unique] un group by user, role;

Here is the actual Oracle syntax:

SELECT
    un."user",
    un.role,
    (
        SELECT COUNT(*)
        FROM (
            SELECT un1."user", un1.role
            FROM "Unique" un1 group by "user", role
        )
    )
FROM "Unique" un group by "user", role;

For the reference, here is the SQL Server specific solution, using CTE:

WITH Q([user], role) AS (
    SELECT un.[user], un.role
    FROM [Unique] un group by [user], role
)
SELECT *, (SELECT COUNT(*) FROM Q)
FROM Q