Re: AW: [HACKERS] isnull() or is it?t
От | H.Lefebvre |
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Тема | Re: AW: [HACKERS] isnull() or is it?t |
Дата | |
Msg-id | 366E8F8C.9BA27BA4@easynet.fr обсуждение исходный текст |
Ответ на | AW: [HACKERS] isnull() or is it?t (Zeugswetter Andreas IZ5 <Andreas.Zeugswetter@telecom.at>) |
Ответы |
Re: AW: [HACKERS] isnull() or is it?t
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Список | pgsql-hackers |
Zeugswetter Andreas IZ5 wrote: > > > isnull() is on our TODO list. > > It should be called NVL() from "Null VaLue" like in Oracle and > Informix. > isnull() would suggest a boolean return value to me. > With SyBase, IsNull(X,Y) returns X if X is not null, and Y if X is null. Example: SELECT reference, name, IsNull(price, 0.00) FROM t_items reference name price ------------ --------------- ------- W95 Windows95 190.00 WNT400 Windows NT 4.0 490.00 LX Linux 0.00 rather than: SELECT reference, name, price, FROM t_items reference name price ------------ --------------- ------- W95 Windows95 190.00 WNT400 Windows NT 4.0 490.00 LX Linux NULL -- H.Lefebvre
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