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What is a view? Make a view of EMP table named DEPT 20, to display the employees in department 20 and their annual salary.
Ans: View is a virtual table that does not consists of it own data it fetch the data from the original table.
Create view DEPT20 as select * from dept;
Where dno=20 group by dno;
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.
Describe relational model? Structure of relational data base Basic structure Database schema Keys Schema diagram Query languages
Database Manager It is the interface among low-level data, queries and application programs. Databases typically need a large amount of storage space. It is kept on disks, as
In a Hierarchical model of data records are organized ? In the hierarchical model of data records are organized as Tree structure.
write short note on mobile database
What is deadlock? Neither of the transaction can ever proceed with its normal implementation. This situation is known as deadlock.
What are temporary tables? Temporary tables exist solely for a particular session or whose data persists for the duration of the transaction.
Describe the objective of Structural Diagrams The main objective of structural diagram is to visualize, construct, specify and document static aspects of a system. Their eleme
I am going to develop a web site to present decision tree structure. For this, I want a web application with AJAX technology to connect the database and prepare the decision tree's
A database named yourusernameFMA has been set up for you to use for this assignment. For the FMA you must create the required tables and run the queries using this database. If y
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