1-2 install and configure MySQL related software

For developers , Just install MySQL Server and MySQL Workbench These two pieces of software , It can meet the needs of development .

1. MySQL Server： Software specifically designed to provide data storage and services
2. MySQL Workbench： Visual MySQL Management tools , They can be conveniently operated and stored in MySQL Server Data in .

database

1.DataType data type ：

1. int Integers
2. **varchar(len)** character string
3. **tinyint(1)** Boolean value

2. Special identification of the field ：

1. PK(Primary Key) Primary key 、 Unique identification
2. NN(Not Null) Value cannot be empty
3. UQ(Unique) It's worth it
4. AI(Auto Increment) The value increases automatically