By the powerful inquiring database function of Visual Basic, data also can be manipulated in the database with the Structural Query Language (SQL), the parameter data of the total flow in month and the charge in month are able to be inquired at any time.

• 通过SQL结构化查询语言对数据库中的数据进行操作,实现月累计流量和月水资两项参数的实时查询。