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Heap files (unordered file)
Mostly these files are unordered files. It is the easiest and most basic type. These files having of randomly ordered records. The records will have no exacting order. The operations we can do on the records are retrieve, insert and delete. The types of the heap file or the pile file Organisation are:
What is the role of ORDER By Clause? ORDER BY clause: The ORDER BY clause permits you to sort the records in your result set. The ORDER BY clause can just be used in select s
Define physical and logical data independence. How does this architecture help in achieving these? Data independence entails that change in one view must not need a change in t
The Database administrator (DBA) uses the data dictionary in each phase of a database life cycle, beginning from the data gathering phase to the design, execution and maintenance p
Determine the OBJECTIVES of object design After passing through this unit, you should be able to: describe and apply concept of generalisation; understand and appl
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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
What are the advantages of creating a table from existing table?
In this practical assignment, we will run through a complete database application development cycle, starting with the schema design, from an initial data import to database applic
Serialisability: Any schedule that makes the similar results as a serial schedule is known as a serialisable schedule. But how can a schedule are determined to be serialisable or n
Express the following queries in SQL: (a) Write the SQL code that will create ALL the four tables given in the appendix. Your answer should not contain the primary key and
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