我想通过主键从mysql中删除一条记录,即account_recharge_detail_id。A.account_recharge_detail_id FROM account_recharge_detail as A where A.operator_name=‘fanny test’)
它返回:错误代码
我正在将mysql数据库表从id (auto)更改为uid。ALTER TABLE companies DROP PRIMARY KEY;这是我得到的错误..[SQL] ALTER TABLE companies DROP PRIMARY KEY;
[Err] 1075 - Incorrect table definition; there can be only
我的rails版本是4.0.0,mysql的版本是Ver 14.14,Win64 (x86_64)是5.7.9。我正在操作一个较旧版本的rails,因为我与mysql发生了一些冲突,就像我以前的问题一样。(请查看的批准答案,以了解我的追索权)rake db:migrate == CreateUsers: migrating ========================StandardError: An error has occurred, all later migrations canceled:
如果你看到任何错误,请让我知道!db_name) print("ERROR: Unexpected error: Could not connect to MySQLcreate table if not exists audiofiles ( id INT NOT NULL AUTO_INCREMENT, name varchar(255) NOT NULL, PRIMARYKEY (id)), length varchar(255) NOT