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Explain what is DDL? DDL - Data Definition Language: statements used to define the database structure or schema. Some examples: CREATE - to create objects in the database ALT
Represent the following scenarios with E-R diagrams drawn using the ER Assistant software. The diagrams should indicate cardinality and optionality of relationships. Transform each
Explain the Strategy of Database Planning ?
What are the various states through which a transaction passes through in its lifetime? Briefly discuss all the events that causes transition from one state to another. Ans:
To delete a particular column in a relation which command is used ? To delete a particular column in a relation ALTER command is used.
Relations create the database. They must satisfy various properties, like no duplicate tuples, no ordering of tuples, and atomic attributes, etc. Relations that satisfy these basic
What do you understand by a view? What does WITH CHECK OPTION clause for a view do? - A view is a virtual table which comprises fields from one or more real tables. - It is
create an e-r diagram usuing graphical dipicted software that could theoritically be used in resturant application
Give some encryption techniques? A) DES B) AES C) Public key encryption
In which format database schema is written ? Data base schema is written in the DDL format.
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