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---+ Linking JDBC-accessible Database Objects into Virtuoso

---++ Steps

   1 Start the Virtuoso Web User Interface.
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   1 Select the *Conductor* link in the left frame and login as the *dba* user.
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   1 Select the *Databases* -> *External Data Source* -> *Data Sources* tab menu items.
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   1 Select the *Connect* button for the *jdbcma* ODBC to JDBC DSN.
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   1 On succesful connection, select the *Link Objects* button to obtain a list of available tables.
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   1 Select all the tables that are part of the *Demo* catalog.
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   1 Select all the *Demo* catalog tables to be linked into the database and click the *Link* button.
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   1 Change the catalog for each table to *JDBC* using the *Set All* button.
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   1 Click the *Link* button to link the selected tables into Virtuoso.
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   1 On completion of the link process, the tables will be displayed in the *External Linked Objects* tab.
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   1 The linked tables can be queried by clicking on the hyperlink in the *Local Name* column of the *External Linked Objects* tab above. This loads the Virtuoso *Interactive SQL* interface with the required SQL *Select* for retrieving the remote table data . We shall use the *JDBC.jdbcma.Artist* table to demonstrate this.
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   1 Click the *Execute* button to run the query and retrieve results from the remote table.
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   1 The tables can also be viewed as part of the Virtuoso *SQL Schema Objects* under the *JDBC* catalog name.
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The link process is now complete enabling the tables to be queried as if part of the Virtuoso Schema.

---++ Related

   * [[VOSSQL2RDF][Mapping SQL Data to Linked Data Views]]
   * [[VirtOJDBCEntityFrameworkUsage][ Using Microsoft Entity Frameworks to Access Remote JDBC-accessible Schema Objects with Virtuoso, via an ODBC-to-JDBC Bridge]]


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