Hi.
I would like to make the following constraint in my
db.
I have three fields:
-field1
-field2
-field3
If field1 is not null, then field2 and field3 MUST be
null. Again, if field2 is not null, then field1 and
field3 MUST be null, and so on...
Is it possible?
How can I do that?
Thanks,
JP
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