如果要删除用户,这是从多个表中删除该用户信息的最佳方法吗?我的目标是在一个查询中做到这一点。查询: DELETE FROM table1 WHERE user_id='$user_id';DELETE FROM table2 WHERE user_id='$user_id';DELETE FROM ...
删除表中的数据 delete 语句用于删除表中的数据,基本用法为: delete from 表名称 where 删除条件;使用示例:*删除id为2的行:delete from students where id=2;删除所有年龄小于21岁的数据:delete from students where...
delete from people where peopleId in(select peopleId from people group by peopleId having count(peopleId)>1)and rowid not in(select min(rowid)from people group by peopleId having count(peopleId)>...
删除表中一行记录:delete from tableName where columnName=value;不加where将删除全部数据 更新表中一行记录:update tableName set columnName=value where columnName=value;查询表中所有记录:select*from ...