Question

There are 3 tables in a database:

Users (UserID, UserName), Roles(RoleID, RoleName) and UserRoles(UserID, RoleID)

How to create a view on Users table which will have IsAdmin column, here is a mockup:

CREATE VIEW UsersView AS
    SELECT
        u.UserID,
        u.UserName,
        CASE WHEN ur.RoleID IS NULL THEN (0) ELSE (1) END AS IsAdmin
    FROM Users AS u
        LEFT JOIN Roles AS r ON r.RoleName = N'Admins'
        LEFT JOIN UserRoles AS ur ON  ur.UserID = u.UserID
                                  AND ur.RoleID = r.RoleID

IsAdmin should be (1) if user is in “Admins” user role and (0) if he is not

Answer 1

My own solutions looks better.