数据库操作错误解决：Error 1075

Error 1075: Incorrect table definition; there can be only one auto column and it must be defined as a key SQL Statement: CREATE TABLE supermarket_vip.vip_card ( vcid VARCHAR(20) NOT NULL, score INT NOT NULL AUTO_INCREMENT, UNIQUE INDEX vcid_UNIQUE (vcid ASC) VISIBLE, PRIMARY KEY (vcid))

创建数据库表时创自增时发现这个错误，后来发现是因为只有主键才能设置自增，所以我加上主键约束后就成功了