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Define various ways in which SELECT statement can be used for record selection Technology?
SELECT gives you control over a number of aspects for record retrieval:
1) Which table to use
2) Which columns to display from the table
3) What names to give the columns?
4) Which rows to retrieve from the table?
5) How to sort the rows
can you please explain with the help of suitable example the difference between conflict equivalence and conflict serializability?
Define an operator that a Relational Algebra does not have Ans: Relational Algebra does not have Aggregation operators.
Performance of Various Concurrency Control Mechanisms
Data Warehousing & Mining 1. What is the concept of knowledge discovery in database? 2. Describe the following types of Multidimensional Data Models. • Stars, Snowflakes and
What is banker's algorithm? Banker's algorithm is a deadlock avoidance algorithm that is applicable to a resource-allocation system with multiple instances of each resource ty
explain in detail about crash recovery
Given the following relations Vehicle (Reg_no, make, colour) Person(eno, name, address) Owner(eno, reg_no) Write expressions in the relational algebra to answer the following
What is the use of keyword ISA? The use of keyword ISA is to show that a class is a specialization of another class.
What is an entity relationship model? The entity relationship model is a collection of basic objects known as entities and relationship between those objects. An
What are called jukebox systems? Jukebox systems have a few drives and numerous disks that can be loaded into single of the drives automatically.
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