How to get records that match value or exist in another table?

Question

I am trying to figure out how to get all tasks in this case that two of the fields equal a certain value or they exist in the other table?

Here is the query:

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Answer 1

This sql matches the result set you posted in your duplicate post that has sample data and result:

SELECT t.task_id, t.task_complete, t.task_creator_id, t.task_assigned_user_Id
FROM tasks t
WHERE t.task_complete = 1 AND
      (
      t.task_creator_id = 8
      OR t.task_assigned_user_id = 8
      OR EXISTS
          (
          SELECT w.task_id
          FROM watchers w
          WHERE w.task_id = t.task_id
          AND w.watcher_user_id = 8
          )
      )