删除mysql中的主键
听起来很简单，但我似乎很难在 mysql 中的表上删除主键 - 有一个以 CompID 作为主键的表 CompanyList。它被用作数据库中其他几个表的外键。
我想保留 CompID 字段，但不希望它成为主键。
我尝试从 CompID 中删除主键，但收到错误。
错误：运行故障回复脚本时出错。详细信息如下。 错误 1050：表“CompanyList”已存在
为了实现此目的，我是否应该删除所有外键引用。
任何帮助将不胜感激。
Sounds simple but I seem to have a tough time in dropping a primary key on a table in mysql - Have a table CompanyList with CompID as the primary key. It is being used as a foreign key in a bunch couple of other tables in the database.
I want to retain the field CompID but I do not want it to be the primary key.
I tried removing the primary key from CompID but got the error.
ERROR: Error when running failback script. Details follow.
ERROR 1050: Table 'CompanyList' already exists
Should I drop all the foreign key references in order to achieve this.
Any help would be greatly appreciated.
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是的，您必须删除所有外键才能删除它们引用的主键。
Yes, you have to drop all FOREIGN KEYs to drop the PRIMARY KEY they reference.