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What is trigger
Triggers are statements that are implemented automatically by the system as the side effect of a change to the database.
1. A company wants a report containing a breakdown of payroll by department. Input, which should be stored in 3 parallel arrays, includes each employee's department number, hourly
What is an Operand? The data on which the operation is to be performed is known as an Operand
what are information system hirarchy?
Normal 0 false false false EN-US X-NONE X-NONE
How to reduce data redundency
Explain Foreign Key? Foreign Key - Let there are two relations (tables) R and S. Any candidate key of the relation R that is referred within the relation S is known as the fo
What is Stored Procedure? A stored procedure is a named group of SQL statements that have been previously formed and kept in the server database. Stored procedures accept input
What are temporary tables? Temporary tables exist solely for a particular session or whose data persists for the duration of the transaction.
What are domain constraints? A domain is a set of values that might be assigned to an attribute .all values that appear in a column of a relation must be taken fro
Implementing software control To implement software control designer must redesign strategy of state event model which is present in dynamic model. There are three basic ap
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