执行truncate table xxx时提示: [Err] 1701 -Cannot truncate a table referenced in a foreign key constraint … 解决办法 删除之前先执行删除外键约束 代码语言:javascript 代码运行次数:0 SETforeign_key_checks=0; 删除完之后再执行启动外键约束 代码语言:javascript 代码运行次数:0 运行 AI代码解释 SETforeign_...
在Mysql中取消外键约束: SET FOREIGN_KEY_CHECKS=0 执行 truncatetablename 然后再设置外键约束: SET FOREIGN_KEY_CHECKS=1
在Mysql中取消外键约束: SET FOREIGN_KEY_CHECKS=0; 执行truncate tablename 然后再设置外键约束: SET FOREIGN_KEY_CHECKS=1; __EOF__
> determine the engine and any foreign keys > associated with that table by checking the output > to the following command: > CREATE TABLE sessions; The CREATE TABLE sessions; cmd. Returns Error 1113 (42000): A table must have at least 1 column. ...
truncate table app04news_userinfo; 报错如下: ERROR 1701 (42000): Cannot truncate a table referenced in a foreign key constraint (`platform`.`app04news_news`, CONSTRAINT `app04news_news_user_id_d2929af9_fk_app04news_userinfo_id`) 问题原因 因为数据库存在主外键关系,不能进行删除或者截断。此时...
ALTER TABLE referencing_table DROP FOREIGN KEY foreign_key_name; 截断表后,可以重新添加外键约束。 使用DELETE语句:如果不想或不能删除外键约束,可以使用DELETE语句代替TRUNCATE。DELETE语句会逐行删除数据,但会保留表的结构和外键约束。 sql DELETE FROM table_name; 级联删除:如果确定要截断表并且希望同时删除所...
在清除mysql表数据时报错: DELETE from weshares where id >0; truncate table weshares; drop 以上方式清楚表数据的时候都报以下错误: Error : Cannot truncate a table referenced in a foreign key constraint (`distribution`.`weshare_delivery_templates`, ...
6、对用TRUNCATE TABLE删除数据的表上增加数据时,要使用UPDATE STATISTICS来维护索引信息。 7、如果有ROLLBACK语句,DELETE操作将被撤销,但TRUNCATE不会撤销。 三、不能对以下表使用 TRUNCATE TABLE 1、由 FOREIGN KEY 约束引用的表。(您可以截断具有引用自身的外键的表。) ...
If you are using InnoDB tables, MySQL will check if there is any foreign key constraint available in the tables before deleting data. If the table has any foreign key constraint, the TRUNCATE TABLE statement deletes rows one by one. If the foreign key constraint has DELETE CASCADE action, ...
To reclaim operating system disk space when truncating an InnoDB table, the table must be stored in its own .ibd file. For a table to be stored in its own .ibd file, innodb_file_per_table must enabled when the table is created. Additionally, there cannot be a foreign key constraint bet...