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MySQL数据库跨版本迁移的实现三种方式

作者:九皇叔叔

本文主要介绍了MySQL数据库跨版本迁移的实现,主要包含mysqldump,物理文件迁移和原地升级三种,具有一定的参考价值,感兴趣的可以了解一下

前言

MySQL数据库不同版本之间进行数据迁移。
迁移的方式,目前有三种方式:

环境介绍

当前环境如下:源库
数据库版本5.7.26
数据库架构:主从
操作系统版本:Red Hat Enterprise Linux Server release 7.5 (Maipo)
节点信息

IP地址状态
192.168.88.31主库
192.168.88.32从库

目标库
数据库版本8.0.32
数据库架构:主从
操作系统版本:Red Hat Enterprise Linux Server release 7.5 (Maipo)
节点信息

IP地址状态
192.168.88.33主库
192.168.88.34从库

数据准备

测试数据:在源库中创建 testdb 库,其内有两张表:clientclient_info ,每张表各 1000条 数据。

在这里插入图片描述

[root@localhost][testdb]> select count(*) from client;
+----------+
| count(*) |
+----------+
|     1000 |
+----------+
1 row in set (0.00 sec)

[root@localhost][testdb]> select count(*) from client_info;
+----------+
| count(*) |
+----------+
|     1000 |
+----------+
1 row in set (0.00 sec)

[root@localhost][testdb]> 

数据迁移

在实际迁移过程中,应用程序一般是会连接数据库的、且实时会有数据进来(即:数据库实时会有新事务产生);
在迁移之前,会有统一步骤,例如:锁业务账号、设置只读、锁库(非必须),若非生成环境,对数据一致性要求不高此步骤可忽略。在各迁移方式中不在分别写入该步骤,现提前统一:

锁账号(业务账号:fid_test

					-- 锁住账号
[root@localhost][mysql]> alter user fid_test@'%' account lock;
Query OK, 0 rows affected (0.00 sec)

					-- 查看账号是否已被锁
[root@localhost][mysql]> select user,host, account_locked from user where user = 'fid_test';
+----------+------+----------------+
| user     | host | account_locked |
+----------+------+----------------+
| fid_test | %    | Y              |
+----------+------+----------------+
1 row in set (0.00 sec)

-- 
-- 若需解锁,执行如下SQL:
					-- 解锁账号
[root@localhost][mysql]> alter user fid_test@'%' account unlock;
Query OK, 0 rows affected (0.00 sec)

[root@localhost][mysql]> select user,host, account_locked from user where user = 'fid_test';
+----------+------+----------------+
| user     | host | account_locked |
+----------+------+----------------+
| fid_test | %    | N              |
+----------+------+----------------+
1 row in set (0.00 sec)

设置只读(主/从 各节点均需要单独执行)
如下是通过 SQL 语句进行设置,数据库一旦重启、只读将会失效。
若想更稳妥一些,需修改配置文件my.cnf,该配置文件位置一般放在/etc/my.cnf(此处位置优先加载),配置文件不同存放位置,可通过如下命令查看:

配置文件系列:只读

[root@localhost mysql]# mysql --help | grep "Default options" -A 1
Default options are read from the following files in the given order:
/etc/my.cnf /etc/mysql/my.cnf /usr/local/mysql/etc/my.cnf ~/.my.cnf 
[root@localhost mysql]# 

当前配置文件存放在了/etc/my.cnf,使用 vi 命令编辑配置文件,修改 read_only 参数,将其参数值设置为 1 即可。

				## 修改后的参数值如下:
[root@localhost mysql]# cat /etc/my.cnf | grep -i read_only
read_only                                   = 1
[root@localhost mysql]# 

SQL语句系列:只读

					-- 设置为只读;若需解除只读:将 on 换成 off
[root@localhost][(none)]> set global read_only = on;
Query OK, 0 rows affected (0.00 sec)

[root@localhost][(none)]> 
[root@localhost][(none)]> show variables like 'read_only';
+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| read_only     | ON    |
+---------------+-------+
1 row in set (0.00 sec)

锁库(主/从 各节点均需要单独执行)

					-- 锁库,**当前会话一旦关闭:此锁,将会自动释放**。
[root@localhost][testdb]> flush tables with read lock;
Query OK, 0 rows affected (0.01 sec)
					-- 查看 GTID事务号是否变动
[root@localhost][mysql]> show master status;
+------------------+----------+--------------+------------------+--------------------------------------------+
| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set                          |
+------------------+----------+--------------+------------------+--------------------------------------------+
| mysql-bin.000005 |  1224273 |              |                  | 903316cd-27ca-11ee-a484-000c29ea6ce5:1-31
+------------------+----------+--------------+------------------+--------------------------------------------+
1 row in set (0.00 sec)

					-- 或者:尝试产生一个事务,将会有报错提示:
[root@localhost][mysql]> create database test1001;
ERROR 1223 (HY000): Can't execute the query because you have a conflicting read lock
[root@localhost][mysql]> 
					-- 在或者执行:show processlist;
					-- 如果存在一个名为 FLUSH TABLES 的进程,并且状态显示为 Waiting for table flush,那么表锁定已经生效了。
[root@localhost][(none)]> show processlist;
+----+-----------------+---------------------+------+------------------+------+---------------------------------------------------------------+--------------------------+
| Id | User            | Host                | db   | Command          | Time | State                                                         | Info                     |
+----+-----------------+---------------------+------+------------------+------+---------------------------------------------------------------+--------------------------+
|  1 | event_scheduler | localhost           | NULL | Daemon           |  616 | Waiting on empty queue                                        | NULL                     |
|  4 | fid_repluser    | 192.168.88.32:62190 | NULL | Binlog Dump GTID |  561 | Master has sent all binlog to slave; waiting for more updates | NULL                     |
|  5 | root            | localhost           | NULL | Query            |    0 | starting                                                      | show processlist         |
|  6 | root            | localhost           | NULL | Query            |    4 | Waiting for global read lock                                  | create database test1001 |
+----+-----------------+---------------------+------+------------------+------+---------------------------------------------------------------+--------------------------+
4 rows in set (0.00 sec)


--
-- 如果需要解锁,执行如下SQL:
[root@localhost][(none)]> unlock tables;
Query OK, 0 rows affected (0.00 sec)

方式一:mysqldump 迁移

在源库中执行如下 命令,进行导出:

				##(1) 查看当前所在目录.
[root@localhost tmp]# pwd
/tmp

				##(2) 进行数据导出.
[root@localhost tmp]# mysqldump -uroot -p123456 -B testdb --single-transaction --routines --triggers --events --set-gtid-purged=off > testdb.sql
mysqldump: [Warning] Using a password on the command line interface can be insecure.
[root@localhost tmp]#
 
				##(3) 查看导出的文件.
[root@localhost tmp]# ls -lh testdb.sql 
-rw-r--r--. 1 root root 278K Mar 16 22:49 testdb.sql
[root@localhost tmp]# 

通过scp命令将文件传输给 目标库

[root@localhost tmp]# scp testdb.sql root@192.168.88.33:/tmp/
The authenticity of host '192.168.88.33 (192.168.88.33)' can't be established.
ECDSA key fingerprint is SHA256:oOGVJ0qhwef57brL+Gev6JYPQYIB7bGXqfCOPPwkkV8.
ECDSA key fingerprint is MD5:a0:c4:91:5a:5a:d1:3e:cb:6d:c8:07:6c:b8:f7:bb:66.
Are you sure you want to continue connecting (yes/no)? yes  ## 这里输入 yes
Warning: Permanently added '192.168.88.33' (ECDSA) to the list of known hosts.
root@192.168.88.33's password:    ## 然后在输入一次密码,不会显示、正常输入即可。
testdb.sql                        100%  277KB   8.7MB/s   00:00    ## 看到进度100%,说明传输完成.
[root@localhost tmp]# 

登录目标库,先创建 testdb 数据库

[root@localhost][(none)]> create database testdb;
Query OK, 1 row affected (0.00 sec)

目标库:进行数据导入,命令如下:

[root@testdbmy01 ~]# mysql -uroot -p123456 testdb < /tmp/testdb.sql 
mysql: [Warning] Using a password on the command line interface can be insecure.
[root@testdbmy01 ~]# 

目标库:验证,确保数据迁移成功。

[root@localhost][(none)]> show tables from testdb;
+------------------+
| Tables_in_testdb |
+------------------+
| client           |
| client_info      |
+------------------+
2 rows in set (0.01 sec)

[root@localhost][(none)]> select count(*) from testdb.client;
+----------+
| count(*) |
+----------+
|     1000 |
+----------+
1 row in set (0.05 sec)

[root@localhost][(none)]> select count(*) from testdb.client_info;
+----------+
| count(*) |
+----------+
|     1000 |
+----------+
1 row in set (0.05 sec)

[root@localhost][(none)]> 

方式二:物理文件迁移

物理文件迁移这种玩法,是通过拷贝 .ibd 文件,那么也就意味着:这个参数innodb_file_per_table 是打开的状态。

[root@localhost][(none)]> show variables like 'innodb_file_per_table';
+-----------------------+-------+
| Variable_name         | Value |
+-----------------------+-------+
| innodb_file_per_table | ON    |
+-----------------------+-------+
1 row in set (0.00 sec)

每创建一张表,都会单独存放在一个表空间中,存放在 datadir 这个变量的路径中。
如下,可得知:当前是存放在了/mysql/data/这个路径中。

[root@localhost][(none)]> show variables like 'datadir';
+---------------+--------------+
| Variable_name | Value        |
+---------------+--------------+
| datadir       | /mysql/data/ |
+---------------+--------------+
1 row in set (0.01 sec)

查看

[root@testdbmy01 ~]# ls -lh /mysql/data/testdb/* 
-rw-r-----. 1 mysql mysql 240K Mar 16 23:05 /mysql/data/testdb/client.ibd
-rw-r-----. 1 mysql mysql 240K Mar 16 23:05 /mysql/data/testdb/client_info.ibd
[root@testdbmy01 ~]# 

现开始进行数据迁移步骤:

源库:查看需要迁移表的结构。将表结构在 目标库 中进行创建。

[root@localhost][testdb]> show create table client \G
*************************** 1. row ***************************
       Table: client
Create Table: CREATE TABLE `client` (
  `id` bigint(20) NOT NULL AUTO_INCREMENT COMMENT '自增ID',
  `client_id` bigint(20) NOT NULL COMMENT 'ID编号',
  `user_no` varchar(30) DEFAULT NULL COMMENT '账号',
  `user_password` varchar(60) DEFAULT NULL COMMENT '密码',
  `nick_name` varchar(30) DEFAULT NULL COMMENT '昵称',
  `real_name` varchar(30) DEFAULT NULL COMMENT '真实姓名',
  `created_time` datetime DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
  `upated_time` datetime DEFAULT CURRENT_TIMESTAMP COMMENT '更新时间',
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=1001 DEFAULT CHARSET=utf8mb4
1 row in set (0.00 sec)

[root@localhost][testdb]> show create table client_info \G
*************************** 1. row ***************************
       Table: client_info
Create Table: CREATE TABLE `client_info` (
  `id` bigint(20) NOT NULL AUTO_INCREMENT COMMENT '自增ID',
  `client_info_id` bigint(20) NOT NULL COMMENT 'ID编号',
  `id_card_no` varchar(30) DEFAULT NULL COMMENT '身份证ID编号',
  `mobile_phone` varchar(30) DEFAULT NULL COMMENT '手机号码',
  `gender` char(5) DEFAULT NULL COMMENT '性别',
  `height` int(11) DEFAULT NULL COMMENT '身高',
  `weight` int(11) DEFAULT NULL COMMENT '体重',
  `political` varchar(30) DEFAULT NULL COMMENT '政治面貌',
  `marital` varchar(30) DEFAULT NULL COMMENT '婚姻状况',
  `hobby` varchar(50) DEFAULT NULL COMMENT '爱好',
  `created_time` datetime DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
  `upated_time` datetime DEFAULT CURRENT_TIMESTAMP COMMENT '更新时间',
  `client_id` bigint(20) NOT NULL COMMENT '外键-客户ID编号.',
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=1001 DEFAULT CHARSET=utf8mb4
1 row in set (0.00 sec)

[root@localhost][testdb]> 

目标库:卸载表空间,执行如下SQL

					-- 卸载 client 表的 表空间
[root@localhost][(none)]> alter table testdb.client discard tablespace;
Query OK, 0 rows affected (0.01 sec)
					-- 卸载 client_info 表的 表空间
[root@localhost][(none)]> alter table testdb.client_info discard tablespace;
Query OK, 0 rows affected (0.01 sec)

					-- 表空间卸载完成之后,表还是会存在的。
[root@localhost][(none)]> show tables from testdb;
+------------------+
| Tables_in_testdb |
+------------------+
| client           |
| client_info      |
+------------------+
2 rows in set (0.00 sec)

					-- 查看表空间之前的文件,已经被删除了。
[root@localhost][(none)]> system ls -lh /mysql/data/testdb/
total 0
[root@localhost][(none)]> 

源库执行 FLUSH TABLES ... FOR EXPORT , 该表这时候处于 quiesce 状态,只读,且创建.cfg metadata文件

[root@localhost][testdb]> flush tables client for export;
Query OK, 0 rows affected (0.00 sec)

-- 执行此之前,需执行 unlock tables; 进行解锁。
-- 在解锁之前,先将 client.cfg 文件 copy 走至目标端。
[root@localhost][testdb]> flush tables client_info for export;
Query OK, 0 rows affected (0.00 sec)

上述sql执行完成后,可看到生成的cfg文件

[root@localhost ~]# cd /mysql/data/testdb/ 
[root@localhost testdb]# ls -lh 
total 480K
-rw-r-----. 1 mysql mysql 8.8K Mar 16 22:04 client.frm
-rw-r-----. 1 mysql mysql 224K Mar 16 22:06 client.ibd
-rw-r-----. 1 mysql mysql 1.1K Mar 16 23:20 client_info.cfg  ##-- client.cfg 已经拷贝至目标端.
-rw-r-----. 1 mysql mysql 9.0K Mar 16 22:05 client_info.frm
-rw-r-----. 1 mysql mysql 224K Mar 16 22:06 client_info.ibd
-rw-r-----. 1 mysql mysql   67 Jul  8  2023 db.opt
[root@localhost testdb]# 

源库:将源库中的 .ibd 和 .cfg文件拷贝到目标库中,路径:/mysql/data/testdb/

[root@localhost testdb]# scp client_info.cfg root@192.168.88.33:/mysql/data/testdb/
root@192.168.88.33's password: 
client_info.cfg                                100% 1119     3.6MB/s   00:00    
[root@localhost testdb]# 
[root@localhost testdb]# scp client_info.ibd root@192.168.88.33:/mysql/data/testdb/
root@192.168.88.33's password: 
client_info.ibd                                100%  224KB  67.4MB/s   00:00    
[root@localhost testdb]# 

目标库 导入表空间即可。
查看 /mysql/data/testdb 文件夹中已经有相关文件了。

[root@testdbmy01 testdb]# pwd
/mysql/data/testdb

## 文件已经存在
## 但是-注意:文件权限不对,当前不修改;进行导入、查看报错日志(学习下)
[root@testdbmy01 testdb]# ls -lh
total 456K
-rw-r-----. 1 root root  810 Mar 16 23:28 client.cfg
-rw-r-----. 1 root root 224K Mar 16 23:28 client.ibd
-rw-r-----. 1 root root 1.1K Mar 16 23:27 client_info.cfg
-rw-r-----. 1 root root 224K Mar 16 23:28 client_info.ibd
[root@testdbmy01 testdb]# 

导入表空间

-- 发现导入表空间报错,这个是因为 文件权限不对引起的。
-- 应该将 .cfg 、.ibd 文件的权限(所属用户)修改为 mysql
[root@localhost][(none)]> alter table testdb.client import tablespace;
ERROR 1812 (HY000): Tablespace is missing for table `testdb`.`client`.
[root@localhost][(none)]> 

--
-- 修改权限
[root@localhost][(none)]> system chown mysql.mysql /mysql/data/testdb/*
[root@localhost][(none)]> system ls -lh /mysql/data/testdb/
total 456K
-rw-r-----. 1 mysql mysql  810 Mar 16 23:28 client.cfg
-rw-r-----. 1 mysql mysql 224K Mar 16 23:28 client.ibd
-rw-r-----. 1 mysql mysql 1.1K Mar 16 23:27 client_info.cfg
-rw-r-----. 1 mysql mysql 224K Mar 16 23:28 client_info.ibd
[root@localhost][(none)]> 

--
-- 再次尝试导入表空间
[root@localhost][testdb]> alter table client import tablespace;
Query OK, 0 rows affected (0.03 sec)

[root@localhost][testdb]> 
[root@localhost][testdb]> alter table client_info import tablespace;
Query OK, 0 rows affected (0.01 sec)

在目标库,验证:

[root@localhost][testdb]> select count(*) from client;
+----------+
| count(*) |
+----------+
|     1000 |
+----------+
1 row in set (0.05 sec)

[root@localhost][testdb]> 
[root@localhost][testdb]> select count(*) from client_info;
+----------+
| count(*) |
+----------+
|     1000 |
+----------+
1 row in set (0.05 sec)

[root@localhost][testdb]> 
[root@localhost][testdb]> select * from client limit 1 \G
*************************** 1. row ***************************
           id: 1
    client_id: 1
      user_no: iaMHg4Uh
user_password: 4tBiW078JrEQHqxHxb2kRMwdgCdcWqaC
    nick_name: 孤胆英雄
    real_name: 司端
 created_time: 2024-03-16 22:05:44
  upated_time: 2024-03-16 22:05:44
1 row in set (0.00 sec)

[root@localhost][testdb]> 

方式三:备份/恢复 原地升级

大致思路步骤:

数据迁移步骤:

源库:全量备份。

DATE=`date +%Y%m%d%H`
mkdir -p /backup/$DATE
/usr/bin/mysqlbackup --user=root --password=123456 --compress --compress-level=9 --backup-dir=/backup/$DATE/ backup-and-apply-log 
# 输出的日志中,务必不要有 error 报错,看到 success 即可,部分日志如下:
... ... 
240316 23:56:32 MAIN    INFO: 1035 MB of data files compressed to 4785 kbytes (compression 99.55%).
240316 23:56:32 MAIN    INFO: Compress Apply Backup operation completed successfully.
mysqlbackup completed OK!

打包文件

## 打包全量备份的文件.
[root@localhost backup]# tar -cf 2024031623.tar 2024031623

## 打包 mysql5.7 版本的软件
[root@localhost local]# tar cf mysql57.tar mysql/

源库:传递文件至目标库

##(1) 将 mysql5.7 版本的软件,传递至目标库
[root@localhost local]# scp mysql57.tar root@192.168.88.33:/soft/

##(2)将 全量备份文件 传递至目标库.
[root@localhost backup]# scp 2024031623.tar root@192.168.88.33:/backup/

##(3)将 mysql5.7 版本的 mysqlbackup 传递至目标库
[root@localhost backup]# scp /usr/bin/mysqlbackup root@192.168.88.33:/soft/mysqlbackup_57

##(4)将 mysql5.7 版本的配置文件 /etc/my.cnf 传递至目标库
[root@localhost backup]# scp /etc/my.cnf root@192.168.88.33:/etc/my_57.cnf

目标库:恢复5.7版本的库。

解压备份文件

[root@testdbmy01 soft]# cd /backup/
[root@testdbmy01 backup]# tar -xf 2024031623.tar 

解压5.7版本的软件

[root@testdbmy01 local]# cd /soft/
[root@testdbmy01 soft]# tar -xf mysql57.tar 
[root@testdbmy01 soft]# mv mysql mysql57

停止 mysql 8.0 软件,并铲除默认的系统库等文件.(建议:在铲除之前可做下全量备份,此处省略.)

## 停掉 mysql8.0 版本软件.
[root@testdbmy01 local]# service mysqld stop
Shutting down MySQL.. SUCCESS! 

## 铲除 mysql8.0 版本相关文件
[root@testdbmy01 local]# rm -rf /mysql
[root@testdbmy01 local]# 

目标库 恢复 5.7 版本相关库

## 创建数据库所需要的安装路径
mkdir -p /mysql/{data,logs,binlog,tmp}
touch /mysql/logs/{mysql-error.log,mysql-slow.log}

## 修改 /etc/my_57.cnf 文件中的软件路径,改成 /soft/mysql57 
## mysql5.7 版本的软件,放置在了 /soft/ 目录中
[root@testdbmy01 mysql57]# cat /etc/my_57.cnf | grep -i basedir
basedir                                     = /soft/mysql57

## 恢复
/soft/mysqlbackup_57 --defaults-file=/etc/my_57.cnf --datadir=/mysql/data --uncompress --backup-dir=/backup/2024031623/ copy-back

## 修改权限
chown -R mysql.mysql /mysql

## 
## 用 mysql5.7 版本软件启动数据库,检查是否正常.
## 启动数据库.
/soft/mysql57/bin/mysqld --defaults-file=/etc/my_57.cnf --user=mysql

## 登录数据库进行验证.==>> 无问题.
[root@testdbmy01 soft]# mysql -uroot -p123456
mysql: [Warning] Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 3
Server version: 5.7.26-log MySQL Community Server (GPL)

Copyright (c) 2000, 2023, Oracle and/or its affiliates.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

[root@localhost][(none)]> 
[root@localhost][(none)]> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| db1001             |
| mysql              |
| performance_schema |
| sys                |
| t1                 |
| t2                 |
| tdb1               |
| tdb2               |
| test1001           |
| testdb             |
+--------------------+
11 rows in set (0.00 sec)

[root@localhost][(none)]> select count(*) from testdb.client;
+----------+
| count(*) |
+----------+
|     1000 |
+----------+
1 row in set (0.00 sec)
 
[root@localhost][(none)]> select count(*) from testdb.client_info;
+----------+
| count(*) |
+----------+
|     1000 |
+----------+
1 row in set (0.00 sec)

[root@localhost][(none)]> 
[root@localhost][(none)]> select  * from testdb.client limit 1\G
*************************** 1. row ***************************
           id: 1
    client_id: 1
      user_no: iaMHg4Uh
user_password: 4tBiW078JrEQHqxHxb2kRMwdgCdcWqaC
    nick_name: 孤胆英雄
    real_name: 司端
 created_time: 2024-03-16 22:05:44
  upated_time: 2024-03-16 22:05:44
1 row in set (0.00 sec)

[root@localhost][(none)]> 

目标库 停用 mysql5.7 版本启动的库,然后使用 mysql8.0 版本进行启动。

停止数据库(5.7版本)

[root@localhost][(none)]> flush tables;
Query OK, 0 rows affected (0.00 sec)

[root@localhost][(none)]> shutdown;
Query OK, 0 rows affected (0.00 sec)

[root@localhost][(none)]> exit
Bye
[root@testdbmy01 soft]# 
[root@testdbmy01 soft]# ps -ef | grep mysql
root       5776   4323  0 00:31 pts/1    00:00:00 grep --color=auto mysql
[root@testdbmy01 soft]# 

使用 mysql8 版本软件进行启动

[root@testdbmy01 soft]# service mysqld start
Starting MySQL......... SUCCESS! 
[root@testdbmy01 soft]# 
[root@testdbmy01 soft]# 
[root@testdbmy01 soft]# ps -ef | grep mysql
root       5834      1  0 00:31 pts/1    00:00:00 /bin/sh /usr/local/mysql/bin/mysqld_safe --datadir=/mysql/data --pid-file=/mysql/data/testdbmy01.pid
mysql      7204   5834 41 00:31 pts/1    00:00:07 /usr/local/mysql/bin/mysqld --basedir=/usr/local/mysql --datadir=/mysql/data --plugin-dir=/usr/local/mysql/lib/plugin --user=mysql --log-error=/mysql/logs/mysql-error.log --open-files-limit=65535 --pid-file=/mysql/data/testdbmy01.pid --socket=/mysql/tmp/mysql.sock --port=3306
root       7580   4323  0 00:31 pts/1    00:00:00 grep --color=auto mysql
[root@testdbmy01 soft]# 
[root@testdbmy01 soft]# 

登录 mysql8 版本数据库,经验证,无问题。

[root@testdbmy01 soft]# mysql -uroot -p123456
mysql: [Warning] Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 11
Server version: 8.0.32 MySQL Community Server - GPL

Copyright (c) 2000, 2023, Oracle and/or its affiliates.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

[root@localhost][(none)]> 
[root@localhost][(none)]> show databases;
+--------------------+
| Database           |
+--------------------+
| db1001             |
| information_schema |
| mysql              |
| performance_schema |
| sys                |
| t1                 |
| t2                 |
| tdb1               |
| tdb2               |
| test1001           |
| testdb             |
+--------------------+
11 rows in set (0.01 sec)

[root@localhost][(none)]> 
[root@localhost][(none)]> select count(*) from testdb.client;
+----------+
| count(*) |
+----------+
|     1000 |
+----------+
1 row in set (0.04 sec)

[root@localhost][(none)]> select count(*) from testdb.client_info;
+----------+
| count(*) |
+----------+
|     1000 |
+----------+
1 row in set (0.05 sec)

[root@localhost][(none)]> 
[root@localhost][(none)]> select * from testdb.client limit 1 \G
*************************** 1. row ***************************
           id: 1
    client_id: 1
      user_no: iaMHg4Uh
user_password: 4tBiW078JrEQHqxHxb2kRMwdgCdcWqaC
    nick_name: 孤胆英雄
    real_name: 司端
 created_time: 2024-03-16 22:05:44
  upated_time: 2024-03-16 22:05:44
  1 row in set (0.00 sec)

[root@localhost][(none)]>

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