The first part ....
translate(lpad(NBR,9,'0'), '0123456789','----------') =
'---------'
checks to see if the string is ENTIRELY made up of numbers. And it also
assumes there is at least 1 character in the string (using lpad of 9 instead
of 10)
The second part .....
NBR between 1 and 199999999)
checks to see if the number is between 1 and 199999999
-----Original Message-----
Sent: Wednesday, June 27, 2001 1:17 PM
To: Multiple recipients of list ORACLE-L
I've got this check constraint on a column (NBR) (which is actually a
VARCHAR2(10)).
translate(lpad(NBR,9,'0'), '0123456789','----------') =
'---------' and NBR between 1 and 199999999)
As far as I can see it's left padding the string with 0's to a length of 9,
translating all numeric characters to '-', doing something else (= '
---------') and testing to see if the resulting string is between 1 and
199999999.
Obviously I'm missing something here. Anyone care to enlighten me? I'm
just documenting it, not designing it.
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