Question

I have a table called “Tasks”. This table has the following fields

• ID
• TypeID
• Description

How do I find all of the tasks that have more than one task of a TypeID? I do not have a TypeID to query with. Rather, I just want to list that tasks that have a TypeID that is used across multiple tasks. I’m not sure how to do this.

Thank you for your help!

Answer 1

SELECT
    *
FROM
    Tasks
WHERE TypeID IN
    (SELECT TypeID FROM Tasks
     GROUP BY TypeID HAVING COUNT(*) > 1)