Sams Teach Yourself BEA WebLogic Server 7.0 in 21 Days

Are there any practical implementations for JDBC drivers supporting the RowSet interface?

There are some implementations available. RowSet is an extension to the JDBC 2.0 API and therefore does not exist in the standard java.sql package, however, it does exist in the javax.sql package. Currently, reference implementation JDBC drivers are available that support RowSets. This is entirely dependent on JDBC driver vendors supporting the extensions.

Are the SQL3 data types supported by all databases? Do the JDBC drivers in WebLogic Server support all of these data types across databases?

No. The SQL3 data types are part of the new data type ANSI standards defined for databases. Currently, Oracle database supports all the SQL3 data types listed in this day. BLOB and CLOB are supported by other databases like Sybase or Informix as well. Please note that the JDBC drivers in WebLogic Server support certain proprietary extensions for the Oracle database.