On Wednesday 18 October 2006 14:44, Mario Weilguni wrote: > Am Mittwoch, 18. Oktober 2006 13:52 schrieb Andreas Joseph Krogh: > > This has been been discussed before, but Oracle behaves differently, and > > IMHO in a more correct way. > > > > The following query returns NULL in PG: > > SELECT NULL || 'fisk'; > > > > But in Oracle, it returns 'fisk': > > SELECT NULL || 'fisk' FROM DUAL; > > > > The latter seems more logical... > > I've worked alot with oracle a few years ago and I agree, the feature is > handy and makes sometimes life easier, but it's simply wrong. I heard a > while ago that newer oracle versions changed this to sql - standard, is > this true?
Oracle(10.1.0.4.0) still treats '' as NULL. Why do these discussions always end in academic arguments over whats more logical then not? From a *user's* point of view I really would like it to treat the NULL operand of || as '', and obviously many other (at least Oracle) users tend to agree with me on that. On Wednesday 18 October 2006 14:42, Csaba Nagy wrote: > And it would really return null, if aggregates wouldn't ignore the NULL > values altogether... the null values are skipped before they get into > the summing. The same happens with count, if you specify a column it > will only count the ones which are not null: If aggregates ignore NULL one could argue that so shuld the ||-operator? -- Andreas Joseph Krogh <[EMAIL PROTECTED]> Senior Software Developer / Manager gpg public_key: http://dev.officenet.no/~andreak/public_key.asc ------------------------+---------------------------------------------+ OfficeNet AS | The most difficult thing in the world is to | Karenslyst Allé 11 | know how to do a thing and to watch | PO. Box 529 Skøyen | somebody else doing it wrong, without | 0214 Oslo | comment. | NORWAY | | Mobile: +47 909 56 963 | | ------------------------+---------------------------------------------+ ---------------------------(end of broadcast)--------------------------- TIP 4: Have you searched our list archives? http://archives.postgresql.org
