The application needed the ability to read and write data from a back-end database.
应用程序需要能够从后端数据库读写数据。
Create the database back end for the example.
为示例应用创建数据库后端。
A relational database back end for a Web application is a given.
需要使用一种关系数据库作为Web应用程序的后端。
The back end code starts at the database, which in this case is MySQL.
后端代码起始于数据库，本例中数据库为MySQL。
The back end code starts at the database, which in this case is MySQL.
后端代码起始于数据库，本例中数据库为MySQL。
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