You've to use either NOT IN or correlated subquery with NOT EXISTS.

Select Meeting_ID
	From Meetings
	Where Meeting_ID Not IN ( select meeting_ID from Events)

-- Or

Select Meeting_ID 
	From Meetings mt
	Where Not Exists ( select * from Events ev 
			WHERE ev.Meeting_ID = mt.Meeting_ID)

> I have a simple query. I have used this query successfuly in the past, however this time it is not working.
>
>Here is the query
>
>Select Meeting_ID
>From Meetings
>Where Not exists(select meeting_ID from Events)
>
>It should returns 1,3,35, because the Ids in Meetings tables (1,3,35) are not in the Events table. Instead it returns 0 records.
>What is wrong with my statement?
>