May 2005
Intermediate to advanced
352 pages
14h 39m
English
Content preview from MySQL in a Nutshell
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Logical Operators
Logical operators are used for evaluating values or expressions for true, false, or unknown. Table B-3 lists allowable logical operators.
Table B-3. Logical operators
|
Operator |
Use |
|---|---|
|
AND |
Logical AND |
|
&& |
Logical AND |
|
IS boolean |
Logical equal |
|
IS NOT boolean |
Logical equal |
|
OR |
Logical OR |
|
|| |
Logical OR |
|
NOT |
Logical NOT |
|
! |
Logical NOT |
|
XOR |
Logical XOR |
The
operators IS and IS NOT are
being added in Version 5.0.2 of MySQL. A boolean value of
TRUE, FALSE, or
UNKNOWN should immediately follow these operators.
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