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What are stored and derived attributes?
Stored attributes: The attributes keeps in a data base are known as stored attributes.
Derived attributes: The attributes that are derived from the stored attributes are known as derived attributes.
What is meant by data-transfer rate? The data-transfer rate is the rate at which data can be retrieved from or kept to the disk.
Economics: It is now usually accepted that it costs less to make a system of smaller computers with the equivalent power of a one large computer. It is more cost-effective to get s
(1) Insert into PERSON Violated constraint: - Key constraint Reason: - Primary key 1 already exists in PERSON. Dealing: - DBMS could ask the user to provide valid PER
Consider a typical sales invoice that would include the following information. Design a single table to hold all of the information required to store an invoice including this info
What does data dictionary is a special file contains ? The data dictionary is a special file contain The name of all fields in all files.The width of all fields in all files an
Normalize the following table upto and including the 3NF. Submit a 1 page printout of only the final set of normalized tables in Data Architect. Just use Data Architect to do the t
What are the two types of indices? The two types of indices are:- A) Dense index B) Sparse index
What are the two distinct aspects to the implementation of associations? i) It is required to define data declarations which will enable details of actual links to be stored. I
What is the use of group by clause? Group by clause is used to apply aggregate functions to a set of tuples. The attributes given in the group by clause are used to
Code an Oracle Database trigger to enforce the constraint that an employee can never change his or her department.
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