PostgreSql boolean operators
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2023-07-11 18:49:48
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One, AND, OR operation truth table
| a |
b |
a AND b |
a OR b |
| TRUE |
TRUE |
TRUE |
TRUE |
| TRUE |
FALSE |
FALSE |
TRUE |
| TRUE |
NULL |
NULL |
TRUE |
| FALSE |
FALSE |
FALSE |
FALSE |
| FALSE |
NULL |
FALSE |
NULL |
| NULL |
NULL |
NULL |
NULL |
2. NOT operation truth table
| a |
NOT a |
| TRUE |
FALSE |
| FALSE |
NULL |
| NULL |
NULL |
Origin blog.csdn.net/songyundong1993/article/details/131416704