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Explain about database system structure?
Storage manager
Authorization and integrity manager
Transaction manager
File manager
Buffer manager
Storage manager executes several data structure as a part of physical system execution
Data function
Data dictionary
Indices
The query processor
DDL interpreter
DML
Query evaluation engine
Q. Describe how an ER schema can be represented by relation schemas and constraints arising from ER design can be mapped to constraints on a relation schema. The entity rela
What sorts of tables one can se in designing the hierarchy of a LDB? Tables, which are having Foreign Key relations.
Draw and explain the three level architecture of the database system? A DBMS gives three levels of data is said to follow three-level architecture. The trget of the three-schem
What is a view in SQL? When can views be updated? A view is a virtual table which consists of columns from one or more tables. Through it is same to a table; it is stored in
(a) Design a query plan for the following distributed query: An application at site B wants to compute a join of STUDENT ? Id=StudId TRANSCRIPT where STUDENT (Id,Major) is at site
A buyer for a large department store chain must place orders with an athletic shoe manufacturer six months prior to the time the shoes will be sold in the department stores. In par
Explain Alternate key? Alternate Key - All the candidate keys except primary key are known as alternate keys.
Question: In a multi-user database environment, locking mechanisms can be used to solve the three basic problems of concurrency. On the other hand, however, locking may also le
what is object-identity
A database has been designed for this beauty parlour in order for the staff to manage specific things such as bookings made by clients, payments, staff availability, level of exper
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