Realization of SQL Query Function among Multiple Data Sources Based on ADO Technique
Xuemei Chen · Computer Technology and Development · 2007
Based on ADO technique for database programming,the ADO link attribute is set up and tested via the data access interface of ADO object by using the universal data link(.udl) supplied by Microsoft,and a visualized data source configuration is dynamically built.The SQL(Structured Query Language) query function is realized by use of the application frame constructed by C++.An example is supplied to show that the operation of databases by the application program built up of ADO is irrelevant to the types of database systems.In the example,the SQL language is used as a standard language by the application program to store and fetch various data.Thus the flexibility and high compatibility of the ADO technique in the fields of database applications are shown.