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Write short notes on extension and intension?
In any data model, it is significant to distinguish among the description of the database and the database itself the description of a database is known as database schema, that is specified during database design and is not expected to change often. The actual data in a database is database itself. May change quite frequently.
The schema is sometimes is known as the intension, and a database state is known as an extension of the schema.
Information about a bank is about customers and their account. Customer has a name, address that consists of house number, area and city, and one or more phone numbers. Account ha
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A table joined with itself is called ? A table joined with itself is known as self join table. Normal 0 false false false EN-IN X-NONE X-NONE
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