Re: Querying all documents for a company and its projects etc
От | David G Johnston |
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Тема | Re: Querying all documents for a company and its projects etc |
Дата | |
Msg-id | 1397505326009-5799978.post@n5.nabble.com обсуждение исходный текст |
Ответ на | Querying all documents for a company and its projects etc (Andreas Joseph Krogh <andreak@officenet.no>) |
Ответы |
Re: Querying all documents for a company and its
projects etc
|
Список | pgsql-general |
A couple of thoughts: 1) The "union" really only pertains to the entity table rows; once you "union all" those (duplicates should not matter and probably will not even be present so using "all" avoids an unnecessary sort) you can join that sub-query to the document_usage table. 2) Since every entity must have an associated company moving the company_id field to the entity table will allow a direct search for company objects using entity alone and remove the need to perform the union. The "company" table omits the implicit self-referencing company_id but it is still there in reality. David J. -- View this message in context: http://postgresql.1045698.n5.nabble.com/Querying-all-documents-for-a-company-and-its-projects-etc-tp5799967p5799978.html Sent from the PostgreSQL - general mailing list archive at Nabble.com.
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