> 1. In sybase, each column can have the same rule applied to it. You don't > have to create multiple rules for columns in different tables. For instance, > let's suppose that we require 5 digit numeric ids, using only a char(5) > type, but there's a constraint on that column that says it must adhere to > idrule, and idrule is defined as: > > create rule idrule as @id like "[0-9][0-9][0-9][0-9][0-9]" (ugly, I know, > but i didn't write it) A domain will do this: http://www.postgresql.org/docs/8.2/interactive/sql-createdomain.html http://www.postgresql.org/docs/8.2/interactive/functions-matching.html#FUNCTIONS-POSIX-REGEXP in the constraint portion of the syntax you can specify a regular expression id ~ '^[0-9]{5}$' > 2. Is there any nice way to generate number sequences via select? In other > words, something along the lines of: > select 1 through 10 as number; generate_series() should do what you want. http://www.postgresql.org/docs/8.2/interactive/functions-srf.html Regards, Richard Broersma Jr.
