Study And Implementation Of Extending SQL Query With XML

With the rapid development of computer network and database, exchanging and sharing data stored in heterogeneous databases distributed in different location is becoming a crucial issue. Presently there are some methods to deal with this problem, normally heterogeneous databases are accessed by well designed application programs. Therefore when the data related with a querying plan are stored in various types of databases, different application programs may be designed to access those databases. The query-extending system based on XML extends SQL Query and allows users to avoid programming many repetitive codes. With support of this system data access and share can be implemented more rationally and efficiently.