three-value boolean logic.
Backpatch to 9.0.X since we just got another bug report about this
today.
<member><literal>NOT</></member>
</simplelist>
- <acronym>SQL</acronym> uses a three-valued Boolean logic where the null value represents
- <quote>unknown</quote>. Observe the following truth tables:
+ <acronym>SQL</acronym> uses a three-valued logic system with true,
+ false, and <literal>null</>, which represents <quote>unknown</quote>.
+ Observe the following truth tables:
<informaltable>
<tgroup cols="4">