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What is foreign key?
A relation schema r1 derived from an ER schema may contain among its attributes the primary key of another relation schema r2.this attribute is known as a foreign key from r1 referencing r2.
In this exercise you will create ten records, each containing the following fields: student name, class: Freshman, Sophomore, Junior or Senior, Major: Liberal Arts or General Sci
Explain the database Planning Project ?
Why, generally does an object-oriented system use the relational DBMS? The reasons for using relational DBMS for OO systems could be any combination of following: a. Many or
give me a diagram about physical or internal level
Multi-Key File Organisation In this part, we will introduce two basic file Organisation schemes that permit records to be accessed by more than one key field, therefore, allowi
Mention the purpose of SID and SOD lines SID (Serial input data line): It is an input line by which the microprocessor accepts serial data. SOD (Serial output data line)
explain equi-join using illustration
My cut off date is very soon in a Database subject and i dont know how to solve anything in it
normal forms
What are the basic objects of the data dictionary? Tables Domains Data elements Structures Foreign Keys
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