您可以这样使用SQL:
DELETe FROM ContactHostCommand USING `contact_hostcommands_relation` AS ContactHostCommand WHERe (ContactHostCommand.`chr_id` = 999999) LIMIT 1

您可以这样使用SQL:
DELETe FROM ContactHostCommand USING `contact_hostcommands_relation` AS ContactHostCommand WHERe (ContactHostCommand.`chr_id` = 999999) LIMIT 1