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Some disadvantages of File Oriented System?
write-set(T): Each data items that are written by a transaction T
Consider the two relations given below Given that A is the primary key of R, D is the primary key of S and there is a referential integrity among S.A and R.A, discuss all
What is transaction? Transaction is a unit of program implementation that accesses and possibly updated several data items.
The Database Approach In order to overcome the limits of a file system, a new approach was needed. Hence a database approach emerged. A database is a persistent collection of
Give some encryption techniques? A) DES B) AES C) Public key encryption
What are three components of the schema architecture proposed by ANSI/SPARC? The three component schema architecture proposed by ANSI/SPARC is as given below: External sche
East Coast Aquarium Relational Database
What is NULL? Simply NULL means not in value.
Which method of access uses key transformation? A Hash method of access uses key transformation.
Write short notes on tuple relational calculus. The tuple relational calculation is anon procedural query language. It defines the desired information without giving a particul
The typical file-oriented system is supported by a conformist operating system. Permanent records are stored in a variety of files and a number of different application programs are written to extract records from and add records to the appropriate files.
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