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Mention the type of constraints we can specify in the CREATE command of DDL.
The type of constraints that can be specified are as follows:-
PRIMARY KEY, NOT NULL, UNIQUE, FOREIGN KEY, CHECK.
what is specialization?
Describe the Association: Design Before we describe association design let us define association "Association is set of links between two objects in the object model". It is
create an e-r diagram usuing graphical dipicted software that could theoritically be used in resturant application
What is recursive closure? Why is it not possible to describe this operation in relational algebra? Recursive closure is applied to recursive relationship. An instance of rec
What is the full form of DDL? DDL is stand for Data Definition Language.
What are the properties in a relation ? In a relation Ordering of rows is immaterial and No two rows are identical.
10A.53 Code an Oracle Database trigger to enforce the constraint that an employee can never change his or her department. 10A.54 Code an Oracle Database trigger to allow the
explaination
What are the advantages of Logical Databases? It offers a simple-to-use selection screens. You can change the pre-generated selection screen to your needs. It offers check f
to develop elrctronic database from manual forms
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