mysql delete 多表连接删除功能

单个表的删除： DELETE FROM tableName WHERE columnName = value; 删除表内的所有行： 即：保留表的结构、属性、索引 DELETE FROM tablename; DELETE * FROM tablename; 删除同一张表内的所有内容（删除数据、表结构） TRUNCATE customer; 无法报告删除了几行，且只能用于单一表 多表连接删除： DELETE orders,itrms FROM orders,items WHERE orders.userid = items.userid AND orders.orderid = i