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You have been requested to provide preliminary information on the data requirements for a GIS that is to be used to hold an inventory of continental scale vegetation maps for coarse scale land surface and climate modelling purposes. The GIS should be able to represent the broad vegetation types of a single continent in its entirety. I have problem to understand the last part: "The GIS should be able to represent the broad vegetation.
What actions does a referential integrity constraint prevent from occurring when data is inserted in a table that contains this constraint?
Over 70% of web applications use database to store persistent data. Write some of the problems and issues associated with internet databases?
Find the average number of books borrowed per member. Take into account that if a member does not borrow any books, then that member does not appear in the borrowed relation at all.
Draw an ER diagram for database scenario. Design a set of 3NF tables for your database scenario.
Create an entity-relationship diagram and design accompanying table layout using sound relational modeling practices and concepts.
Write a SELECT statement which returns three columns: VendorName, InvoiceCount, and InvoiceSum. InvoiceCount is the count of the number of invoices, and InvoiceSum is the sum of the InvoiceTotal column.
Produce a scatterplot of Rent vs. Size (square meters of the apartment) for the rental data in rent.
Practice on topic of Normalization
Draw an ER diagram for your database scenario. Design a set of 3NF tables for your database scenario.
Write a SELECT statement that returns three columns: InvoiceTotal From the Invoices table, 10% 10% of the value of InvoiceTotal.
Describing the purpose of database an its functionality, plus a detailed E-R diagram.
One of the tenets of database development is to never permit developers to create or own objects during development. All objects are created by application owner and stored in that schema.
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