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What is meant by log-based recovery?
The most widely used structures for recording database changes is the log. The log is a sequence of log records, recording all the update activities in the database. There are various types of log records.
What is association? Give an example of association Association is used for establishing relationships among classes. Association describe links among/between classes. For exa
Explain cursors in SQL? Cursors in SQL - An object used to store the output of a query for row-through-row processing through the application programs. Cursors are constructs
Explain the function of input controls. Identify four types of input control and explain the function of each. Provide an example of a data integrity error that could occur i
Define instance and schema? Instance: Collection of data kept in the data base at a particular moment is known as an Instance of the database. Schema: The o
What is D command work in the respect of QBE? D: It is the command inside QBE to delete tuple(s) from the relation.
We face problem of stock Opening balance and closing balance in Minus
Examples:- Hierarchical Model: It tells data as and relationships by hierarchy of data values. Figure illustrates an example of hierarchical model. Now a day's these models are
Project Description: I would like to get a database of a website which has clients email name and phone number. If you are able to get information from a website, by entering
What is meant by computing the closure of a set of functional dependency? The closure of F denoted by F + is the set of functional dependencies logically implied by F.
Question 1 Explain ER model Question 2 What are the characteristics of a computer provided information? Question 3 What are facts and guidelines to be considered when se
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