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升级方式一、二进制方式安装

1、下载mysql-5.7.42安装包（mysql-5.7.37升级mysql-5.7.42）

地址：https://downloads.mysql.com/archives/community/

mysql-5.7.42-1.el7.x86_64.rpm-bundle.tar

2、备份数据库、my.cnf文件，停止mysql服务（重要）

[root@db-mysql mysql-tar]# mysqldump -hlocalhost -uroot -p --all-databases > /home/user/db-test_back_2023.sql[root@db-mysql mysql-tar]# cp /etc/my.cnf /etc/5.7.37_my.cnf[root@db-mysql ~]# systemctl stop mysqld

3、查看当前数据库版本

mysql> select@@version;
+-----------+
| @@version |
+-----------+
| 5.7.37    |
+-----------+
1 row in set (0.00 sec)mysql> 

3、上传 mysql-5.7.42-1.el7.x86_64.rpm-bundle.tar并解压

[root@db-mysql ~]# mkdir mysql-bundle
[root@db-mysql ~]# 
[root@db-mysql ~]# tar -xvf mysql-5.7.42-1.el7.x86_64.rpm-bundle.tar -C ~/mysql-bundle
mysql-community-client-5.7.42-1.el7.x86_64.rpm
mysql-community-common-5.7.42-1.el7.x86_64.rpm
mysql-community-devel-5.7.42-1.el7.x86_64.rpm
mysql-community-embedded-5.7.42-1.el7.x86_64.rpm
mysql-community-embedded-compat-5.7.42-1.el7.x86_64.rpm
mysql-community-embedded-devel-5.7.42-1.el7.x86_64.rpm
mysql-community-libs-5.7.42-1.el7.x86_64.rpm
mysql-community-libs-compat-5.7.42-1.el7.x86_64.rpm
mysql-community-server-5.7.42-1.el7.x86_64.rpm
mysql-community-test-5.7.42-1.el7.x86_64.rpm
[root@db-mysql ~]# 

4、查看安装MySQL有关的包

[root@db-mysql mysql-bundle]# rpm -qa|grep -i mysql
mysql-community-common-5.7.37-1.el7.x86_64
mysql-community-client-5.7.37-1.el7.x86_64
mysql-community-server-5.7.37-1.el7.x86_64
mysql-community-libs-5.7.37-1.el7.x86_64
[root@db-mysql mysql-bundle]# 

5、升级、按顺序执行

[root@db-mysql mysql-bundle]# ll
总用量 544432
-rw-r--r--. 1 7155 31415  29405072 3月  18 11:09 mysql-community-client-5.7.42-1.el7.x86_64.rpm
-rw-r--r--. 1 7155 31415    318948 3月  18 11:09 mysql-community-common-5.7.42-1.el7.x86_64.rpm
-rw-r--r--. 1 7155 31415   4430172 3月  18 11:09 mysql-community-devel-5.7.42-1.el7.x86_64.rpm
-rw-r--r--. 1 7155 31415  48202108 3月  18 11:10 mysql-community-embedded-5.7.42-1.el7.x86_64.rpm
-rw-r--r--. 1 7155 31415  23316088 3月  18 11:10 mysql-community-embedded-compat-5.7.42-1.el7.x86_64.rpm
-rw-r--r--. 1 7155 31415 133343532 3月  18 11:10 mysql-community-embedded-devel-5.7.42-1.el7.x86_64.rpm
-rw-r--r--. 1 7155 31415   2747748 3月  18 11:10 mysql-community-libs-5.7.42-1.el7.x86_64.rpm
-rw-r--r--. 1 7155 31415   1264424 3月  18 11:10 mysql-community-libs-compat-5.7.42-1.el7.x86_64.rpm
-rw-r--r--. 1 7155 31415 187276248 3月  18 11:10 mysql-community-server-5.7.42-1.el7.x86_64.rpm
-rw-r--r--. 1 7155 31415 127179748 3月  18 11:10 mysql-community-test-5.7.42-1.el7.x86_64.rpm
[root@db-mysql mysql-bundle]# rpm -Uvh mysql-community-server-5.7.42-1.el7.x86_64.rpm --force --nodeps
警告：mysql-community-server-5.7.42-1.el7.x86_64.rpm: 头V4 RSA/SHA256 Signature, 密钥 ID 3a79bd29: NOKEY
准备中...                          ################################# [100%]
正在升级/安装...1:mysql-community-server-5.7.42-1.e################################# [ 50%]
正在清理/删除...2:mysql-community-server-5.7.37-1.e################################# [100%]
[root@db-mysql mysql-bundle]# rpm -Uvh mysql-community-client-5.7.42-1.el7.x86_64.rpm --force --nodeps
警告：mysql-community-client-5.7.42-1.el7.x86_64.rpm: 头V4 RSA/SHA256 Signature, 密钥 ID 3a79bd29: NOKEY
准备中...                          ################################# [100%]
正在升级/安装...1:mysql-community-client-5.7.42-1.e################################# [ 50%]
正在清理/删除...2:mysql-community-client-5.7.37-1.e################################# [100%]
[root@db-mysql mysql-bundle]# rpm -Uvh mysql-community-libs-5.7.42-1.el7.x86_64.rpm --force --nodeps
警告：mysql-community-libs-5.7.42-1.el7.x86_64.rpm: 头V4 RSA/SHA256 Signature, 密钥 ID 3a79bd29: NOKEY
准备中...                          ################################# [100%]
正在升级/安装...1:mysql-community-libs-5.7.42-1.el7################################# [ 50%]
正在清理/删除...2:mysql-community-libs-5.7.37-1.el7################################# [100%]
[root@db-mysql mysql-bundle]# rpm -Uvh mysql-community-common-5.7.42-1.el7.x86_64.rpm --force --nodeps
警告：mysql-community-common-5.7.42-1.el7.x86_64.rpm: 头V4 RSA/SHA256 Signature, 密钥 ID 3a79bd29: NOKEY
准备中...                          ################################# [100%]
正在升级/安装...1:mysql-community-common-5.7.42-1.e################################# [ 50%]
正在清理/删除...2:mysql-community-common-5.7.37-1.e################################# [100%]
[root@db-mysql mysql-bundle]# 

6、检查和升级数据库字典

[root@db-mysql mysql-bundle]#  mysql_upgrade -uroot -p123456
mysql_upgrade: [Warning] Using a password on the command line interface can be insecure.
Checking if update is needed.
Checking server version.
Running queries to upgrade MySQL server.
Checking system database.
mysql.columns_priv                                 OK
mysql.db                                           OK
mysql.engine_cost                                  OK
mysql.event                                        OK
mysql.func                                         OK
mysql.general_log                                  OK
mysql.gtid_executed                                OK
mysql.help_category                                OK
mysql.help_keyword                                 OK
mysql.help_relation                                OK
mysql.help_topic                                   OK
mysql.innodb_index_stats                           OK
mysql.innodb_table_stats                           OK
mysql.ndb_binlog_index                             OK
mysql.plugin                                       OK
mysql.proc                                         OK
mysql.procs_priv                                   OK
mysql.proxies_priv                                 OK
mysql.server_cost                                  OK
mysql.servers                                      OK
mysql.slave_master_info                            OK
mysql.slave_relay_log_info                         OK
mysql.slave_worker_info                            OK
mysql.slow_log                                     OK
mysql.tables_priv                                  OK
mysql.time_zone                                    OK
mysql.time_zone_leap_second                        OK
mysql.time_zone_name                               OK
mysql.time_zone_transition                         OK
mysql.time_zone_transition_type                    OK
mysql.user                                         OK
The sys schema is already up to date (version 1.5.2).
Checking databases.
db-test.user                                       OK
sys.sys_config                                     OK
Upgrade process completed successfully.
Checking if update is needed.
[root@db-mysql mysql-bundle]# 

7、启动mysql，检查版本和数据

[root@db-mysql ~]# mysql -u root -p
Enter password: 
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.7.42 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.mysql> select@@version;
+-----------+
| @@version |
+-----------+
| 5.7.42    |
+-----------+
1 row in set (0.00 sec)mysql> 

mysql> use db-test;
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -ADatabase changed
mysql> select * from user;
+----+-----------+------+--------+
| id | name      | age  | class  |
+----+-----------+------+--------+
|  1 | 宋江      |   18 | 一班   |
|  2 | 卢俊义    |   20 | 二班   |
|  3 | 吴用      |   18 | 一班   |
|  4 | 公孙胜    |   19 | 二班   |
|  5 | 林冲      |   20 | 三班   |
|  6 | 呼延灼    |   16 | 四班   |
+----+-----------+------+--------+
6 rows in set (0.00 sec)mysql> 

---

升级方式二、压缩包方式安装

1、下载mysql-5.7.42安装包（mysql-5.7.18升级mysql-5.7.42）

地址：https://downloads.mysql.com/archives/community/

mysql-5.7.42-linux-glibc2.12-x86_64.tar.gz

2、备份数据库（重要）

[root@db-mysql mysql-tar]# mysqldump -hlocalhost -uroot -p --all-databases > /home/user/myblog_back_2023.sql

3、备份完成之后，停止mysql服务

[root@db-mysql mysql-tar]# systemctl stop mysqld

4、解压mysql-5.7.42

[root@db-mysql mysql-tar]# tar -zxvf mysql-5.7.42-linux-glibc2.12-x86_64.tar.gz

5、备份旧版mysql-5.7.18 安装目录下的文件，

[root@db-mysql mysql]# mkdir mysql_bk
[root@db-mysql mysql]# cp -R mysql/* mysql_bk
### 或者直接压缩
### tar -zcvf mysql.tar.gz mysql
[root@db-mysql bin]# tar zcf mysql.tar.gz mysql

6、删除旧版安装目录下(bin、docs、includ、lib、share、support-files、LICENSE、README)；删除/etc/init.d/ 下的mysqld

[root@db-mysql ~]# rm -rf bin
[root@db-mysql ~]# rm -rf docs
[root@db-mysql ~]# rm -rf include
[root@db-mysql ~]# rm -rf lib
[root@db-mysql ~]# rm -rf README
[root@db-mysql ~]# rm -rf LICENSE
[root@db-mysql ~]# rm -rf share
[root@db-mysql ~]# rm -rf support-files

[root@db-mysql bin]# cd /etc/init.d/
[root@db-mysql init.d]# tar zcf mysqld_5.7.18.tar.gz mysqld
[root@db-mysql init.d]# rm -rf mysqld

7、将新解压的mysql-5.7.42目录复制到原来mysql安装目录下（/usr/local/mysql/），并修改文件权限。

[root@db-mysql mysql-tar]# mv mysql-5.7.42-linux-glibc2.12-x86_64/* /usr/local/mysql
[root@db-mysql mysql]# chown -R mysql:mysql /usr/local/mysql

8、将新解压的mysql-5.7.42的mysqld版本复制到/etc/init.d/ 下

[root@db-mysql mysql-5.7.42-linux-glibc2.12-x86_64]# cp support-files/mysql.server /etc/init.d/mysqld

9、修改参数

[root@db-mysql ~]# vi /etc/init.d/mysqld

和原来安装的数据数据目录保持一致

datadir=/usr/local/mysql/data
basedir=/usr/local/mysql

10、启动mysql、检查版本

[root@db-mysql ~]# systemctl start mysqld
[root@db-mysql ~]# systemctl status mysqld
● mysqld.service - LSB: start and stop MySQLLoaded: loaded (/etc/rc.d/init.d/mysqld; bad; vendor preset: disabled)Active: active (running) since 三 2023-05-10 22:45:11 CST; 2min 36s agoDocs: man:systemd-sysv-generator(8)CGroup: /system.slice/mysqld.service├─3279 /bin/sh /usr/local/mysql/bin/mysqld_safe --datadir=/usr/local/mysql/data --pid-file=/usr/local/mysql/data/db-mysql.pid└─3494 /usr/local/mysql/bin/mysqld --basedir=/usr/local/mysql --datadir=/usr/local/mysql/data --plugin-dir=/usr/local/mysql/lib/plugin --use...5月 10 22:45:10 db-mysql systemd[1]: Starting LSB: start and stop MySQL...
5月 10 22:45:11 db-mysql mysqld[3268]: Starting MySQL. SUCCESS!
5月 10 22:45:11 db-mysql systemd[1]: Started LSB: start and stop MySQL.
[root@db-mysql ~]# 

[root@db-mysql ~]# mysql -V
mysql  Ver 14.14 Distrib 5.7.42, for linux-glibc2.12 (x86_64) using  EditLine wrapper
[root@db-mysql ~]# 
[root@db-mysql ~]# mysql -u root -p
Enter password: 
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.7.42 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.mysql> show version();
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'version()' at line 1
mysql> 
mysql> select@@version;
+-----------+
| @@version |
+-----------+
| 5.7.42    |
+-----------+
1 row in set (0.00 sec)mysql> 

11、行mysql_upgrade进行检查

[root@db-mysql ~]# mysql_upgrade -uroot -p --force --skip-version-check
Enter password: 
Running queries to upgrade MySQL server.
Checking system database.
mysql.columns_priv                                 OK
mysql.db                                           OK
mysql.engine_cost                                  OK
mysql.event                                        OK
mysql.func                                         OK
mysql.general_log                                  OK
mysql.gtid_executed                                OK
mysql.help_category                                OK
mysql.help_keyword                                 OK
mysql.help_relation                                OK
mysql.help_topic                                   OK
mysql.innodb_index_stats                           OK
mysql.innodb_table_stats                           OK
mysql.ndb_binlog_index                             OK
mysql.plugin                                       OK
mysql.proc                                         OK
mysql.procs_priv                                   OK
mysql.proxies_priv                                 OK
mysql.server_cost                                  OK
mysql.servers                                      OK
mysql.slave_master_info                            OK
mysql.slave_relay_log_info                         OK
mysql.slave_worker_info                            OK
mysql.slow_log                                     OK
mysql.tables_priv                                  OK
mysql.time_zone                                    OK
mysql.time_zone_leap_second                        OK
mysql.time_zone_name                               OK
mysql.time_zone_transition                         OK
mysql.time_zone_transition_type                    OK
mysql.user                                         OK
The sys schema is already up to date (version 1.5.1).
Checking databases.
myblog.album                                       OK
myblog.article                                     OK
myblog.comment                                     OK
myblog.likes                                       OK
myblog.user                                        OK
sys.sys_config                                     OK
Upgrade process completed successfully.
Checking if update is needed.
[root@db-mysql ~]# 

12、账号密码、数据等检查