标签：let tables 表名 ons arch nod mysqldump 方法 index
一、往表中插入数据
1、命令语法：
insert into <表名> [(<字段名1>[,..<字段名n>])] values (值1)[,(值n)]
2、新建一个简单的测试表test
create table `test`( `id` int(4) not null auto_increment, `name` char(20) not null, primary key (`id`) );
3、往表中插入数据的不同的语法例子：
1）按规矩指定所有列名，并且每列都插入值
mysql> insert into test(id,name) values(1,‘oldboy‘); Query OK, 1 row affected (0.00 sec) mysql> select * from test; +----+--------+ | id | name | +----+--------+ | 1 | oldboy | +----+--------+ 1 row in set (0.00 sec)
2）由于id列为自增的，所有，可以只在name列插入值
mysql> insert into test(name) values(‘oldgirl‘); Query OK, 1 row affected (0.11 sec) mysql> select * from test; +----+---------+ | id | name | +----+---------+ | 1 | oldboy | | 2 | oldgirl | +----+---------+ 2 rows in set (0.00 sec)
3）如果不知道列，就要按规矩为每列都插入恰当的值
mysql> insert into test values(3,‘inca‘); Query OK, 1 row affected (0.36 sec) mysql> select * from test; +----+---------+ | id | name | +----+---------+ | 1 | oldboy | | 2 | oldgirl | | 3 | inca | +----+---------+ 3 rows in set (0.00 sec)
4）批量插入数据方法，提升效率
mysql> insert into test values(4,‘zuma‘),(5,‘kaka‘); #批量插入2条记录，提升效率 Query OK, 2 rows affected (0.35 sec) Records: 2 Duplicates: 0 Warnings: 0 mysql> select * from test; +----+---------+ | id | name | +----+---------+ | 1 | oldboy | | 2 | oldgirl | | 3 | inca | | 4 | zuma | | 5 | kaka | +----+---------+ 5 rows in set (0.00 sec) insert into `test` values (1,‘oldboy‘),(2,‘oldgirl‘),(3,‘inca‘),(4,‘zuma‘),(5,‘kaka‘);
4、插入数据实践演示：
mysql> delete from test; Query OK, 5 rows affected (0.36 sec) mysql> select * from test; Empty set (0.00 sec) mysql> insert into `test` values (1,‘oldboy‘),(2,‘oldgirl‘),(3,‘inca‘),(4,‘zuma‘),(5,‘kaka‘); Query OK, 5 rows affected (0.10 sec) Records: 5 Duplicates: 0 Warnings: 0 mysql> select * from test; +----+---------+ | id | name | +----+---------+ | 1 | oldboy | | 2 | oldgirl | | 3 | inca | | 4 | zuma | | 5 | kaka | +----+---------+ 5 rows in set (0.00 sec)
5、测试完毕，退出数据库，然后备份上述数据，留着备用：
[root@localhost ~]# mysqldump -uroot -pdubin -B oldboy >/opt/oldboy_bak.sql [root@localhost ~]# ls -l /opt/oldboy_bak.sql -rw-r--r--. 1 root root 2826 9月 20 08:42 /opt/oldboy_bak.sql [root@localhost ~]#
6、备份后检查备份的sql数据内容：过滤无用信息
[root@localhost ~]# grep -E -v "#|\/|^$|--" /opt/oldboy_bak.sql USE `oldboy`; DROP TABLE IF EXISTS `student`; CREATE TABLE `student` ( `id` int(4) NOT NULL AUTO_INCREMENT, `name` char(20) NOT NULL, `age` tinyint(2) NOT NULL DEFAULT ‘0‘, `dept` varchar(16) DEFAULT NULL, PRIMARY KEY (`id`), UNIQUE KEY `uni_inde_name` (`name`), KEY `index_dept` (`dept`(8)), KEY `ind_name_dept` (`name`(8),`dept`(10)) ) ENGINE=InnoDB DEFAULT CHARSET=latin1; LOCK TABLES `student` WRITE; UNLOCK TABLES; DROP TABLE IF EXISTS `test`; CREATE TABLE `test` ( `id` int(4) NOT NULL AUTO_INCREMENT, `name` char(20) NOT NULL, PRIMARY KEY (`id`) ) ENGINE=InnoDB AUTO_INCREMENT=6 DEFAULT CHARSET=latin1; LOCK TABLES `test` WRITE; INSERT INTO `test` VALUES (1,‘oldboy‘),(2,‘oldgirl‘),(3,‘inca‘),(4,‘zuma‘),(5,‘kaka‘); UNLOCK TABLES;
7、一个备份错误案例：如果不检查备份数据可能导致数据不是想要的。
[root@localhost ~]# mysqldump -uroot -pdubin -A -B oldboy >/opt/oldboy_bak1.sql [root@localhost ~]# grep -E -v "#|\/|^$|--" /opt/oldboy_bak1.sql Usage: mysqldump [OPTIONS] database [tables] [root@localhost ~]# cat /opt/oldboy_bak1.sql Usage: mysqldump [OPTIONS] database [tables] OR mysqldump [OPTIONS] --databases [OPTIONS] DB1 [DB2 DB3...] OR mysqldump [OPTIONS] --all-databases [OPTIONS] For more options, use mysqldump --help
提示：
1、错误的点事 -A 表示所有库，后面不能指定oldboy库了
2、5.1.68版本：
[root@localhost ~]# mysqldump -uroot -pdubin -A -B --event >/tmp/oldboy_bak.sql
8、补存强调：我们平时登录网站发帖子，发博文，实质上都是调用web网站的程序连接MySQL数据库，通过上述的insert语句把帖子博文数据存入数据库的。
标签：let tables 表名 ons arch nod mysqldump 方法 index
原文地址：https://www.cnblogs.com/cnxy168/p/11594362.html
