Re: CHECK() Constraint on Column Using Lookup Table - Mailing list pgsql-general

Rich Shepard wrote:
>   I've seen the syntax for using a lookup table in a CHECK() constraint,
> but
> I cannot find a reference to it. It's not in Section 5.3.1 of the 8.2 docs.
>
>   Specifically, I want to reference a table of ISO 2-letter codes for US
> states and Canadian provinces/territories in a table with name and address
> columns.
>
>   Please point me to a reference.

You could use a function, or a foreign key.


Joshua D. Drake

>
> Rich
>


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