Hi,

After a lot of search through numerous web-pages, I have failed
to understand what does a database catalog mean. I understand what
schemas are, but I have yet to find a description of catalog. Do they
exist just to categorize the space in a huge database ?
JDBC provides a call to get the catalogs in a database as a
part of the database metadata. Can the databases that support catalogs
(any examples of such databases??) have any schemas that do not belong
to a catalog? I mean, can a schema (or a table if the schemas are not
supported) not be a part of some catalog in a database that supports
catalogs.
Any hints or suggestions would be very helpful. Thanks in
advance.

Mahim.

From what I know (book knowledge), catalog is a collection of schemas.
See Guide to DB Design and Definition #3.2.

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