Download addresses of various versions of MySQL and multi version coexistence installation

One 、 demand ：

This machine has been installed Mysql5.5, Now install Mysql8.0.18, And requires two versions of the database to run at the same time .

Two 、Mysql Download of each version

mysql Download address of each version ：MySQL :: Download MySQL Installer (Archived Versions)

3、 ... and 、Mysql8.0.18 Installation （ This machine has been installed 5.5）

a、 Run the downloaded installation package

b、 Because it is installed Mysql5.5, So click directly on “ Cancel ” Button , See the text on the figure for specific reasons .

c、 add to Mysql8.0.18 Installation components of

d、 Select the components you want to install , And click Next .

 e、 Follow the prompts for the next step , And set the new port number , Such as 3307

And then through sqlyog Make a test connection , If prompt “plugin caching_sha2_password could not be loaded”, Then refer to the following article for treatment ：

SQLyog Wrong number plugin caching_sha2_password could not be loaded_ Luoyue love learning blog -CSDN Blog