Schema and Catalogs
Database schema and catalogs can be used to hold collections of database components and objects suitable for particular users. They can be particularly useful when working with large databases. The functions SQLSchemaNamesand SQLCatalogNames can be used to learn the names of the schema and catalogs in the database. These can be used with the 
and 
options to SQLTableNames, SQLTableInformation, SQLTables, SQLColumnNames, SQLColumnInformation, and SQLColumns to focus attention on particular parts of the database.
Listing catalogs and schema.
If you find that the examples in this tutorial do not work as shown, you may need to install or restore the example database with the 
package, as described in "Using the Example Databases".
First, the DatabaseLink package is loaded and a connection is made to the publisher example database.
This returns the schema names for the connection.
| Out[3]= |  |
SQLSchemaInformation returns more information about the database schema.
| Out[4]= |  |
This returns the catalog names; for this database there are no catalogs.
| Out[5]= |  |
