Re: [HACKERS] SQL92
От | Thomas G. Lockhart |
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Тема | Re: [HACKERS] SQL92 |
Дата | |
Msg-id | 36110ECE.E3596440@alumni.caltech.edu обсуждение исходный текст |
Ответ на | SQL92 ("Jackson, DeJuan" <djackson@cpsgroup.com>) |
Список | pgsql-hackers |
> Does the SQL92 standard have to be purchased from the ANSI Board? afaik, yes. > Well, my actual question has to do with LIKE. Could anyone who has a > copy of a standard send me the PATTERN syntax/meanings for LIKE in > SQL92? Well, you may be hoping for more than is in any of your reference books, but there isn't any more to tell :) % ==> match any (sub)string _ ==> match any single character everything else matches itself In SQL92 (but not yet in Postgres; can't remember if there is a workaround): LIKE 'pattern' ESCAPE 'char' allows a single character "char" if it precedes the two pattern matching characters to demote the "%" or "_" to act like a normal single character. The Postgres regex stuff is much more powerful. Sorry, I think that's it :( - Tom
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