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Define the terms i) DDL ii) DML DDL: Data base schema is specified by a set of definitions expressed by a special language known as a data def
Describe briefly models which define the operations on classes. The three models which are used to define operations on classes are as: Object Model = data dictionary + Obje
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
how can apply joins on table
Code an Oracle Database trigger to enforce the constraint that an employee can never change his or her department.
the of super market system done in database
What is a primary key? Primary key is chosen by the database designer as the principal means of identifying an entity in the entity set.
Do you have experts of the dbms
One-way Associations If an association is only traversed in single direction, then it is known as one-way association. It is implemented as a pointer or an attribute which con
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