CHECK() Constraint on Column Using Lookup Table

   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.

Rich

--
Richard B. Shepard, Ph.D.               |    The Environmental Permitting
Applied Ecosystem Services, Inc.        |          Accelerator(TM)
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