1. When using pycharm to operate the database, you will encounter the yellow sql mark as shown in the figure.
The solution is as follows
1. Click on the Database in the upper right corner
2. Click the green "+"---Data Source---MySQL
3. Enter the database IP, Database, User, Password on the General page; after entering, click "Apply"
4. Click MySQL in the list on the left, and click "Download" in the Settings page
5. Then click the green "+" on the right, add "mysql-connector-java-5.1.44.zip", click "Apply", click "OK"
