数据层维护是系统存在的应用型数据，通过存储介质，将系统相关信息存储到

 Data layer is applied to maintain the data existing system, through a storage medium, the system-related information is stored in a medium, and preserved by a regular manner. The upper end of the system through software, database information, and various effective operation, through the operation to meet the client's bus route system business functions, data storage and data access, the main core operating input and output data, deal with these two points, it will be able to handle business functions of a management system accurately.

 Data layer maintenance is the application data that exists in the system, which stores system-related information on a medium and is stored in a regular way. The upper end of the system, through program software, the information in the database, can carry out a variety of effective operations, through operation to achieve the bus route system client's business functions, data storage and data access, its main core operation is the input and output of data, handle these two points, can accurately deal with the business functions of a management system.

Data layer maintenance is the application data existing in the system. Through the storage medium, the relevant information of the system is stored in a certain medium, and saved in a regular way. The upper end of the system, through the program software, can carry out various effective operations on the information in the database, through the operation to achieve the business function of the bus route system client, data storage and data access, its main core operation is the data input and output, handle these two points well, can accurately handle the business function of a management system.<br>