DELETE 语句: mysql> use RUNOOB; Database changed mysql> DELETE FROM runoob_tbl WHERE runoob_id=3; Query OK, 1 row affected (0.23 sec)使用PHP 脚本删除数据PHP 使用 mysqli_query() 函数来执行SQL语句,你可以在 DELETE 命令中使用或不使用 WHERE 子句。
mysql> delete from emp where e_id=1002; Query OK, 1 row affected (0.02 sec) mysql> select * from emp; +---+---+---+---+---+---+---+ | e_id | e_name | gender | jobtime | salary | phone | dept_id | +---+---+---+---+---+---+---...
使用的存储引擎:MySQL5.7 InnoDB 聚簇索引 * 如果表设置了主键,则主键就是聚簇索引 * 如果表没有主键,则会默认第一个NOT NULL,且唯一(UNIQUE)的列作为聚簇索引 * 以上都没有,则会默认创建一个隐藏的row_id作为聚簇索引 1. 2. 3. InnoDB的聚簇索引的叶子节点存储的是行记录(其实是页结构,一个页包含多...
This deletes all rows from the table named tbl_name in the database named db_name. It is exactly equivalent to executing TRUNCATE db_name.tbl_name in MySQL. Options that can be used with ndb_delete_all are shown in the following table. Additional descriptions follow the table. Table...
mysql>deletefrom mysql.user where user='testuser01';QueryOK,1rowaffected(0.01sec)# 再次创建testuser01用户失败 mysql>create user'testuser01'@'%'identified by'Test01.~!#';ERROR1396(HY000):OperationCREATEUSERfailedfor'testuser01'@'%'
LIMIT row_count;以下查询首先根据 runoon_title 的字母顺序对数据进行排序,然后从表中删除前三条记录: mysql> DELETE FROM runoon_tbl ORDER BY runoon_title LIMIT 3; JOIN 子句JOIN 子句用于添加两个或多个表。每当我们想从单个查询中的多个表中删除记录时,...
Delete RowPosted by: colum Date: January 03, 2006 06:51AM Hi I am writing just a simple links system. Did not thing this would be that much of a nusance, but im stuck... Basically i have the list.php which sends an $id i.e 1 this then should be picked up by the delete....
delete from tu where c1=5; Query OK, 1 rows affected (0.00 sec) ---TRANSACTION 146751, ACTIVE 2 sec 3 lock struct(s), heap size 360, 2 row lock(s), undo log entries 1 MySQL thread id 1, OS thread handle 0x7f61ab1c7700, query id 134 localhost msandbox cleaning up ...
SET FOREIGN_KEY_CHECKS=0; DELETE FROM table_name WHERE condition; SET FOREIGN_KEY_CHECKS=1; 3. 主键约束问题 错误信息:Cannot delete or update a parent row: a foreign key constraint fails 原因:删除的数据是其他表的外键引用的主键。 解决方法: 先删除或更新相关联的数据。 禁用外键检查(不推荐在生...
Re: Delete row from list Adam Bruzon January 29, 2008 04:44AM Re: Delete row from list Adam Compton January 29, 2008 05:46PM Re: Delete row from list Adam Bruzon January 30, 2008 03:44AM Sorry, you can't reply to this topic. It has been closed. ...