--On Thursday, September 25, 2003 20:59:25 +0200 Adam Wieckowski <[EMAIL PROTECTED]> wrote:
Użytkownik Larry Rosenman napisał:
I have the following rows (in addition to others):
acct_num text, master_acct_num text,
These are in the same table.
What I want to enforce is that if the master_acct_num field is NOT NULL (it can be NULL, and that's fine), that the value appears in some row as acct_num. acct_num has a unique index on it, so that's fine.
I'm not sure how to do this....
Thanks!
LER
select case when master_acct_num is null then acct_num else master_acct_num end from table;
did you mained somethink like this ?
I'm actually looking to enforce the fact that if master_acct_num is entered, it points
to a valid acct_num.
LER
-- Larry Rosenman http://www.lerctr.org/~ler Phone: +1 972-414-9812 E-Mail: [EMAIL PROTECTED] US Mail: 1905 Steamboat Springs Drive, Garland, TX 75044-6749
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