foreign-key-association - Related information

• What does it mean not to use foreign keys in Internet development?

  it is said that Internet developers try to not to use foreign keys , so what does the here mean by not using foreign keys ? 1. The meaning here is clear: No foreign key constraints . For example, when deleting data in one table, if you want to casc...

  Java mysql table-design foreign-key-association foreign-key

  Apr.01,2021
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-64f5-1b3a038-2b958.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b3a038-2b958.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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