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NULL predicate
Applies to ✅ Open Source Edition ✅ Express Edition ✅ Professional Edition ✅ Enterprise Edition
In SQL, you cannot compare NULL with any value using comparison predicates, as the result would yield NULL again, which is neither TRUE nor FALSE (see also the manual's section about conditional expressions). In order to test a column expression for NULL, use the NULL predicate as such:
TITLE IS NULL TITLE IS NOT NULL
BOOK.TITLE.isNull() BOOK.TITLE.isNotNull()
Dialect support
This example using jOOQ:
BOOK.TITLE.isNull()
Translates to the following dialect specific expressions:
-- All dialects BOOK.TITLE IS NULL
(These are currently generated with jOOQ 3.19, see #10141), or translate your own on our website
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