jdbc drivers?

Answer Posted / srinivas

we have 4 types drivers
1)JDBC-ODBC bridge.
2)native-API partly Java technology-enabled driver.
3)A net-protocol fully Java technology-enabled driver
4)A native-protocol fully Java technology-enabled driver
-------------------------------------
1)JDBC-ODBC bridge:-A JDBC-ODBC bridge provides JDBC API
access via one or more ODBC drivers. Note that some ODBC
native code and in many cases native database client code
must be loaded on each client machine that uses this type of
driver. Hence, this kind of driver is generally most
appropriate when automatic installation and downloading of a
Java technology application is not important. For
information on the JDBC-ODBC bridge driver provided by Sun
----------------------------------------------------------------
2)native-API partly Java technology-enabled driver converts
JDBC calls into calls on the client API for Oracle, Sybase,
Informix, DB2, or other DBMS. Note that, like the bridge
driver, this style of driver requires that some binary code
be loaded on each client machine.
--------------------------------------------------------
3)A net-protocol fully Java technology-enabled driver
translates JDBC API calls into a DBMS-independent net
protocol which is then translated to a DBMS protocol by a
server. This net server middleware is able to connect all of
its Java technology-based clients to many different
databases. The specific protocol used depends on the vendor.
In general, this is the most flexible JDBC API alternative.
It is likely that all vendors of this solution will provide
products suitable for Intranet use. In order for these
products to also support Internet access they must handle
the additional requirements for security, access through
firewalls, etc., that the Web imposes. Several vendors are
adding JDBC technology-based drivers to their existing
database middleware products.
--------------------------------------------------------------
4)A native-protocol fully Java technology-enabled driver
converts JDBC technology calls into the network protocol
used by DBMSs directly. This allows a direct call from the
client machine to the DBMS server and is a practical
solution for Intranet access. Since many of these protocols
are proprietary the database vendors themselves will be the
primary source for this style of driver. Several database
vendors have these in progress.

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