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Consider the ER schema below for the MoneyMaking supermarket chain problem. Translate the given ER schema into SQL CREATE TABLE statement.
Explain the Check Clause The CHECK clause is employed to at the end of a CREATE TABLE statement specify table constraints. This is known as table-based constraint because it ap
What are the two types of errors? The two types of errors are: a) Logical error b) System error
Identify the need and use of data control through problem solving, illustration
exercise solution
How can we Classify the operations on classes This step fundamentally means all three models functional, object and dynamic (studied in last section) must be combined so that
How does a query tree represent a relational algebra expression? Discuss any three rules for query optimisation, giving example as to when should each rule be applied. Ans
Describe relational model? Structure of relational data base Basic structure Database schema Keys Schema diagram Query languages
Draw an entity relationship diagram (ERD) for the following situation: A company has a number of employees. Each employee is identified by an Employee_Id. The company wants to st
Introductory course and so does not require any fancy coding. I will provide a guidance document to help you in producing the solutions.
what are the reasons having variable length records
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