在安装mysql没有developer default选项很有可能是之前装过mysql但是卸载没卸干净，导致path重合，不能二次安装MySQL。按照下面步骤即可重新安装
To remove MySQL Workbench and Server from your Windows computer, you need to go through the following 4 steps (with no exception). Make sure you complete all of them to finish the operation successfully:文章来源：https://www.toymoban.com/news/detail-767294.html
- Uninstall MySQL from Control Panel/Programs and Features
- Uninstall MySQL from the start menu/Firewall/Allow an App through Windows Firewall (if found there)
- Remove all files from drive C:/ProgramData/MySQL (if this folder is hidden on your computer, you could search for %programdata% in the start menu)
- Remove all files from the Windows registry. To complete this step, you need to search for regedit in the start menu. Then, remove all files from the MySQL folder in the regedit editor.
MySQL 的安装其实很简单，但是你二次安装或者安了一半关掉安装的东西就会导致developer default消失。按照上面的删掉一些东西就可以，比如第三步。删完就会再出现了 文章来源地址https://www.toymoban.com/news/detail-767294.html
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