Suppose a database has data for a table like the Student table (link below) stored in a file on disk. What does the database have to do in order to display this table to a user? What must be in the database catalog? http://bit.ly/1pgcA7g
It has to open the file and retrieve the database and show the relationship when the appropriate commands are issued.
catalogof a database must contain metadatain which definitions
of database objects such as base tables,
views (virtual tables),synonyms, value ranges,indexes, users and user groups are stored