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Data Independence
This brings us to our next topic: data independence. It is the property of the database which tries to make sure that if we make any change in any level of schema of the database, the schema instantly above it would need minimal or no need of change.
Differentiate between a subquery and a join If we need to acquire information from one or more tables after that either subquery or join can be used. If the columns which are t
What is the aim of logical schema ? The main motive of the logical schema is to ensure the portability of procedures and models on various physical schemas at runtime.
Question (a) Concurrent access to data from a database is a normal part of application program usage. Describe three approaches to concurrency control (b) Distinguish among
What are stand-alone procedures? Procedures that are not part of a package are called as stand-alone because they independently defined. A good example of a stand-alone procedu
what does glory be mean
Describe Parameteric end users? Parametric end users might be given update access, but are commonly not permitted to change the structure of data.
Name the various privileges in SQL? A) Delete B) Select C) Insert D) Update
Write a query that display ename annual salary and comm from emp table
Consider the ER schema below for the MoneyMaking supermarket chain problem. Translate the given ER schema into SQL CREATE TABLE statement.
What is known as clustering file organization? In the clustering file organization, records of several dissimilar relations are stored in the similar file.
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