PostgreSQL 9.2.0 Documentation | ||||
---|---|---|---|---|

Prev | Up | Chapter 9. Functions and Operators | Next |

The usual logical operators are available:

AND |

OR |

NOT |

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 |

The operators `AND` and `OR` are commutative, that is, you can switch the left
and right operand without affecting the result. But see Section 4.2.14 for
more information about the order of evaluation of
subexpressions.

copyright ©
November 26 2015 url: http://durak.org/sean/pubs/software/postgresql/functions-logical.html