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Recent content by RaymondPang
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Need help: Select a row if exists in any 1 of 3 tables
just a query, can the following work for the case select user_id from tablea where user_id=123 union (select user_id from tableb where user_id=123) union (select user_id from tablec where user_id=123) is performance poor than using full outer join ?- RaymondPang
- Post #6
- Forum: Microsoft SQL Server: Programming
