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Write a query to define tables students and teachers as sub tables of people?
Create table students of student under people
Create table teachers of teacher under people
What should be declared explicitly in the corresponding ABAP/4 Statements to access internal tables without header lines & why? Work Area. This is needed as the Work Area is
The need for three level architecture The aim of the three level architecture is to divide each user's view of the database from the way the database is physically shown.
Which method is used to key transformation ? A hash method is used to key transformation.
Define garbage collection. Garbage may be formed also as a side effect of crashes. Periodically, it is essential to find all the garbage pages and to add them to the list of fr
What are called index-sequential files? The files that are ordered sequentially with a primary index on the search key are known as index-sequential files
(a) Why did SAP introduce the extended star schema?
Differentiate between B-tree and B + tree Ans: A B-tree (or Balanced Tree) is a search tree along with additional constraints that makes sure that the tree is all the time
Improved performance: As the data is located near the site of its demand, and given the inherent parallelism because of multiple copies, speed of database access may be good for di
what is relationship inheritance and attribute inheritance
case study
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