PHP mySql - 将语句更改为NOT删除某些值？

Question

DELETE FROM banned_users WHERE datetime < (NOW() - INTERVAL $ban MINUTE)

我目前正在使用上述内容仅删除禁令解除的帐户，但是我可以将语句更改为不删除'ban_length'中的项目！=“INF”

Answer 1

假设您没有其他要求，那么这应该可以解决问题：

DELETE FROM banned_users WHERE ban_length != 'INF' && datetime < (NOW() - INTERVAL $ban MINUTE)

Answer 2

DELETE FROM banned_users WHERE datetime < (NOW() - INTERVAL $ban MINUTE) && ban_length != 'INF'

Answer 3

不删除ban_length != 'INF'的项目？因此，仅在ban_length = 'INF'？

时删除项目

DELETE FROM banned_users
WHERE datetime < (NOW() - INTERVAL $ban MINUTE)
AND ban_length = 'INF';

Answer 4

5.1.24之后，mysql为INF，INF和NaN提供NULL。如果你使用的是大于5.1.24的mysql，你可以试试这个：

DELETE FROM banned_users WHERE datetime < (NOW() - INTERVAL $ban MINUTE) AND ban_length=NULL

或者，您可以尝试：

DELETE FROM banned_users WHERE datetime < (NOW() - INTERVAL $ban MINUTE) AND ban_length=INF