HI
just started using postgres I want to do a select like the following.
I have a table with two columns a and b, in b sometimes data are missing.
I want to select column b, and if data are missing instead column a
as one column in my select.
I did:
SELECT ifnull(a,b) FROM table;
==>ERROR: No such function 'ifnull' with the specified attributes
tried the same thing with isnull and coalesce, same error.
(on my machine: postgresql version 6.4.2)
help?! thanks, jochen
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. Dipl. Geogr. Jochen Schmidt * | | .
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. Department of Geography phone +49/0228/739646 | | | | * .
. University of Bonn fax +49/0228/739099 | |_| | | |.
. Meckenheimer Allee 166 jochen.schmidt@uni-bonn.de \___ |_| |.
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