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What are the properties of transaction? There are three properties of transactions :- A) Atomicity B) Consistency C) Isolation
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.
what problems are raised by the database? why is it so controversial? why is data quality an issue?
As with other software, databases can potentially be used for unethical purposes. As a database developer, and a consumer, you should recognize database misuse, and how it may affe
Record based Logical Models: Use records as the key data representation components Examples: Relational Model: It shows data as well as relationship between data in the form
Preliminary entities and attributes of human resourse management database management system
Consider the following relations: BRANCH( bno, street, area, city, pcode, Tel_no, Fax_no) STAFF( Sno, Fname, Lname, address, position , salary, bno) Express the subsequent qu
what do you mean by primary key constraint?
Atomicity: It describes a transaction to be a one unit of processing. We can also say either a transaction will be finished completely or not at all. In the transaction example 1
Explain the function of Object model Object model describes the classes of objects in system, including their attributes and operations which they support. The analysis object
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