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I've been doing this. You can use a zero in place of ' ', if your field is numeric. It's a little backwards looking, but, it saves extra ands and ors.
select * from ncnotl
where :wnnorn in (' ',ncnlnorn) and ncnldtpco = :wndtpco
-----Original Message-----
From: RPG400-L <rpg400-l-bounces@xxxxxxxxxxxxxxxxxx> On Behalf Of Mónica Anastácio
Sent: Saturday, March 7, 2020 3:50 AM
To: RPG programming on IBM i <rpg400-l@xxxxxxxxxxxxxxxxxx>
Subject: SQL ignore part of WHERE if parameter is null
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select * from ncnotl
where ncnlnorn = :wnnorn and ncnldtpco = :wndtpco
anyone now if its possible to ignore this - ncnlnorn = :wnnorn - when the field has no information and pass to the other condition.
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