On Sun, 29 Aug 2004 22:26:25 +0100, Tim Bunce <[EMAIL PROTECTED]> wrote: > Do any databases support CREATE TABLE statement with fields > having a DEFAULT clause without a NOT NULL? > > CREATE TABLE foo ( > bar INTEGER, > baz INTEGER DEFAULT 42 > )
Yes. Informix does. > and if so, under what circumstances is the default applied? When no value is supplied for the column in the insert statement. INSERT INTO foo(baz) VALUES(12); -- baz gets the default! > I can imagine it meaning that > > INSERT INTO foo (bar, baz) VALUES (1, NULL) > > doesn't trigger the DEFAULT, but that Correct: a legitimate "value" - NULL - is supplied and stored. > INSERT INTO foo (bar) VALUES (1) > > would. Correct. > But I'm just guessing. I'm not aware of any that do that as I've > never looked into it before. > > Tim [trying to write a book, it seems] Good luck with the writing... -- Jonathan Leffler <[EMAIL PROTECTED]> #include <disclaimer.h> Guardian of DBD::Informix - v2003.04 - http://dbi.perl.org "I don't suffer from insanity - I enjoy every minute of it."
