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
mysql中运行SET FOREIGN_KEY_CHECKS=0,删除外键约束 之后执行SET FOREIGN_KEY_CHECKS=1,启动外键约束 在重新truncate table xxx;清空就可以了
FOREIGN KEY constraints, InnoDB performs fast truncation by dropping the original table and creating an empty one with the same definition, which is much faster than deleting rows one by one."http://dev.mysql.com/doc/refman/5.1/en/truncate.htmlObviously, deleting rows one-by-one is quite ...
如果想保留标识计数值,请改用 DELETE。如果要删除表定义及其数据,请使用 DROP TABLE 语句。 4、对于由 FOREIGN KEY 约束引用的表,不能使用 TRUNCATE TABLE,而应使用不带 WHERE 子句的 DELETE 语句。由于 TRUNCATE TABLE 不记录在日志中,所以它不能激活触发器。 5、TRUNCATE TABLE 不能用于参与了索引视图的表。
[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 复制 SETforeign_key_checks=0; 删除完之后再执行启动外键约束 代码语言:javascript 复制 SETforeign_key_checks=1; ...
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`, ...
问题 truncate xx时,提示cannot truncate a table refrenenced in a foreign key constraint 解决 You can do truncate by skipping foreign key checks. SET FOREIGN_KEY_CHECKS = 0; TRUNCATE table1; SET FOREIGN_KEY_CHECKS = 1;
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...
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...
> > 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 ...