delete from table_name 和 delete * from table_name 区别？

delete from tablename:清空一个表内容,但不清空表结构,该表格仍然存在,而且表格中列的信息不会改变 drop table tablename:不但删除表内容,而且使用drop table命令...

delete * from - 没有这种语法,只有delete from更快速不能回滚的删除:TRUNCATE TABLE table_name; 评论(1) | 8 7 sirxenofex | 四级 采纳率19% 擅长: ...

delete table 与delete from table 效果一样 delete table删除表的数据,表仍然存在,仍可以对表进行操作。同样,还有一个TRUNCATE TABLE TABLENAME语句,也是删除数据,...

它的作用是清空一个表格,在删除数据方面,其与delete有一些区别:1、在功能上,truncate是清空一个表的内容,它相当于delete from table_name。2、delete是dml操作,...

mysql中删除表记录delete from和truncate table的用法区别: MySQL中有两种删除表中记录的方法,一种是delete from语句,另一种是truncate table语句。 delete from语句...

两张表:create table text1(id int, name varchar(10)) create table text2...delete from text2 from (select * from text1) t1 inner join (select * ...

delete from 表名与truncate table 表名区别,选择适合我们的删除数据库数据的方法1.delete不能使自动编号返回为起始值。但是truncate能使自动增长的列的值返回为默认...

必应词典为您提供delete from tablename where的释义,网络释义: 条件;删除操作;删除操纵;

DELETE FROM table WHERE Id BETWEEN 4 AND ...我本来想:DELETE FROM table WHERE Id BETWEEN 4 AND (SELECT COUNT(Id) FROM table)但是不对啊。。。高手解...

delete table from table where …… 我常见的都是 delete from table[A] where ………是delete table[A] from table[B] where ……… 英语...