我在mysql数据库中有这个表:+------------------------+-------------+------+-----+---------+-------+
| Field | Type | Null | Key表创建本身并不定义主键。在创建表之后,使用以下liquibase命令将2列的组合设置为主键</
我有下面的桌子CREATE TABLE personalInfo(userid BIGINT AUTO_INCREMENT PRIMARY KEY)CREATETABLE patentInfo userid BIGINT, FOREIGN KEY (userid) REFERENCES; there can be only one auto column and it must be defined as a key</em