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Now that she understands more about the benefits of databases, the play-scheme manager would like to extend the play-scheme database to include data for schools and instructors as detailed below.
The manager wants to store the name, address and phone number for each school in the play-scheme's catchment area (regardless of whether any children from the school are registered for the play-scheme). She also wants to record which school each child attends. (Each child can only attend one school.)
notes about update opreation
#quCreate a database design specification (Enhanced Entity Relationship Diagram (EERD) and Relational Data Model (RDM)) from the given business description. The RDM must be in 3rd
Write a query that display ename annual salary and comm from emp table
Describe Object Relational model ? Object Relational Model - This model combines the characteristics of both relational model and object oriented model. It extends the tradit
Define rotational latency time. The time spent waiting for the sector to be accessed to appear under the head is known as the rotational latency time.
Consider the subsequent relation schemes: Project (Project#, Project_name, chief_architect) Employee (Emp#, Empname) Assigned_To (Project#, Emp#) Give expression i
Explain Data Sublangauges ? Data sublanguage: In relational database theory, the term sublanguage, first used for this purpose through E. F. Codd in the year of 1970, refers t
QUESTION (a) Consider a car database consisting of car model, car make, car origin, Engine capacity, color, cost.
Describe the definition of a transaction in SQL Ans: The SQL transaction starts implicitly. Transactions are finished by either Commit work that commits the transaction and st
What is OLAP? OnLine Analytical Processing (OLAP) is a Business Intelligence (BI) reporting system. OLAP gives the user with the capability to sum, count, average and do other
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