Logical operators and comparison cloud operators of Python

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Mar.23,2021
Changing the comparative or below

to and, an or b is equivalent to not (not an and not b)


because you are not good at Boolean logic. "not (An or B)" is equivalent to "not An and not B", that is, "one is true" is equivalent to "neither is true" (rather than "at least one of the two is not true").

MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1b3a32b-2af39.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b3a32b-2af39.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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