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Explain the systems development life cycle.
This is the traditional method to develop, maintain, and replace information systems that contains the project identification and selection, project initiation and planning, analysis, logical design, physical design, execution, and maintenance steps. The process is a series of steps that are ideally completed in a linear fashion. In reality, the process is not linear and the process needs steps to be revisited and an overlap of steps.
What are three components of the schema architecture proposed by ANSI/SPARC? The three component schema architecture proposed by ANSI/SPARC is as given below: External sche
What is persistency? Persistency ensures which data is stored and that after the object is no longer available (program stops running) the data will be available to other users
Attributes and its types explain?
Why is database design important?
as a customer service employee, explain five measures you would recommend a displeased student to patronise a school canteen
Type of views : Simple views and Difficult Views Feature Simple Views Complex Views Number of tables One
Define the categories of SQL Statements? 1) Statements that don't return a result set. This statement class includes INSERT, DELETE, and UPDATE. 2)Statements that return
How many types of Views are there? There are Four types of views:- Database View Help View Projection View Maintenance View
Compare the Nested-loop join and block-nested loop join Ans: Nested loop join - It is costly as worst case cost, no. of block accesses needed is n r * b s + b r where b
Explain the paths in the association network We can analyze use of paths in the association network as given below: Calculate each operation Find associations whic
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