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Question 1: a) What is the difference between a non-impact and impact printer? b) Which type of printer is generally used in a supermarket to print your receipt? Describe
The Database MySQL scripts cars_for_sale.sql and car_details.sql containing the data to use for this task have been supplied. To complete this task, you need to first create
In which relational modes, cardinality is termed? Answer : Cardinality is termed in a number of tuples relational modes.
What are the comparison operator in SQL? Comparison operator in SQL are =, LIKE and BETWEEN
Explain the concept of generalization and aggregation in E_R diagrams. Give one example for each one of them? Generalization: Consider extending the entity set account throug
What is database Trigger? A database trigger is a PL/SQL block that can explained to automatically execute for insert, update, and delete statements against a table. The trigge
Define reference file
Write a query that display ename annual salary and comm from emp table
Give the reasons for allowing concurrency? The reasons for allowing concurrency is if the transactions run serially, a short transaction might have to wait for a preceding long
Scenario 1: Power goes out after the first instruction. What happens?
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