Re: SELECT * FROM foo OFFSET -1 LIMIT 1
От | Martín Marqués |
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Тема | Re: SELECT * FROM foo OFFSET -1 LIMIT 1 |
Дата | |
Msg-id | 200506271417.28851.martin@bugs.unl.edu.ar обсуждение исходный текст |
Ответ на | SELECT * FROM foo OFFSET -1 LIMIT 1 (Markus Bertheau ☭ <twanger@bluetwanger.de>) |
Ответы |
Re: SELECT * FROM foo OFFSET -1 LIMIT 1
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Список | pgsql-sql |
El Lun 27 Jun 2005 12:34, Markus Bertheau ☭ escribió: > Hi, > > is there a reason that > > SELECT * FROM t1 OFFSET -1 LIMIT 1 > > does not return 0 rows? Accordingly > > SELECT * FROM t1 OFFSET -1 LIMIT 2 > > should return 1 row, imo. From the docs: The LIMIT clause consists of two independent sub-clauses: LIMIT { count | ALL } OFFSET start count specifies the maximum number of rows to return, while start specifies the number of rows to skip before starting to return rows. When both are specified, start rows are skipped before starting to count the count rows to be returned. How do you skip -1 rows? -- select 'mmarques' || '@' || 'unl.edu.ar' AS email; --------------------------------------------------------- Martín Marqués | Programador, DBA Centro de Telemática | Administrador Universidad Nacional del Litoral ---------------------------------------------------------
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