The database product can be described as a dazzling, both high-end Oracle, DB2, also have a mid-end SQLServer, MySQL, Sybase, etc., as well as low-end access. This makes the programmer to consider the question when programming, is there. One method implements a database access method that is not related to the database. The author has made the following summary on the development experience of many years: the method of using the interface is the easiest way to find it.
