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In computing, Open Database Connectivity (ODBC) is a standard application programming interface (API) for accessing database management systems (DBMS). The designers of ODBC aimed to make it independent of database systems and operating systems .
The connection object obtained from the connection pool is often a wrapper around the actual database connection. The wrapper understands its relationship with the pool, and hides the details of the pool from the application. For example, the wrapper object can implement a "close" method that can be called just like the "close" method on the ...
Note that Connection s, Statement s, and ResultSet s often tie up operating system resources such as sockets or file descriptors. In the case of Connection s to remote database servers, further resources are tied up on the server, e.g. cursors for currently open ResultSet s.
To connect with individual databases, JDBC (the Java Database Connectivity API) requires drivers for each database. The JDBC driver gives out the connection to the database and implements the protocol for transferring the query and result between client and database. JDBC technology drivers fit into one of four categories. [2] JDBC-ODBC bridge
A DataReader can in some cases be used in place of a DataTable, however many programmers have experienced connection bloat when following this approach. A DataReader can only be used against an (already) open database connection; that connection isn't closed until the DataReader's Dispose method is called.
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The most widespread use of the CLI standard is the basis of the Open Database Connectivity (ODBC) specification, which is widely used to allow applications to transparently access database systems from different vendors. The current version of the API, ODBC 3.52, incorporates features from both the ISO and X/Open standards.
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