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What will be create when a primary key if combined with a foreign key?
A primary key if combined with a foreign key it creates Parent-Child relationship between the tables that connect them.
Example RELATION SCHEMA for STUDENT: STUDENT (Roll No: string, name: string, login: string, age: integer) RELATION INSTANCE
Explain the EXISTS and UNIQUE functions of SQL. Give an example for each? EXISTS: The EXISTS function takes one parameter that is a SQL statement. If any records exist which
Use Access 2007 to create a database called UniLib.mdb. - this file should be created on your personal drive at the university (or C: if you're using Access 2007 at home) and t
What is nested relational model? The nested relational model is an extension of relational model in which domains might be either atomic or relation valued.
anyone have a textbook solutions case fair, 8 edition of vol 1 ?, please give me
Give the general form of SQL query? Select A1, A2............., An From R1, R2..............., Rm Where P
Database Administrator One of the main perpose for having the database management system is to have control of both data or programs accessing that data. The person having li
The cross-section of twisted pair The cross-section of each and every strand of the twisted pair is π/4 square mm. A 10-km length of this type of material, with two strands per
How to use Oracle
Shared lock or Read Lock It is requested by a transaction that needs to just read the value of data item. A shared lock on a data item does not permit an exclusive lock
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