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Databases are powerful tools for storing, managing, manipulating, and accessing data. Most information systems in use today make use of some form of database. In this lesson you will learn about the Access user interface (UI), how to design and create tables, and how to design and create queries
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What is the cost of joining R and S using a page-oriented simple nested loops join? What is the minimum number of buffer pages required for this cost to remain unchanged?
The database application project (DAP) for this course consists of the creation of a fully functional Microsoft Access database application for a real client.
our boss approached you to identify a solution for a performance issue and system outages that have been experienced on
An ER diagram for the system. Show all entities, relationships, cardinalities and optionalities. Also, include all intersection entities. You must use the Finkelstein methodology as per the study book and tutorials.
Print to screen the 'below average' if minimum unit_cost is 10 for the same product (use sh.costs table)
What is the difference between the information provided by the E-R Diagram and the data dictionary?
Draw an Entity Relationship diagram for the system and Identify the table design for the database displaying all the fields/attributes. Ensure that all tables are in 3NF. You also need to identify the primary keys and foreign keys, where applicable..
Give at least three reasons why ETL functions are most challenging in a data warehouse environment.
Write the SQL code to delete the row for William Smithfield and write the SQL code that will save the changes
Integrity constraint prevent from happening when data is inserted in table which contains this constraint? Let INSERT, UPDATE, and DELETE actions on both child and the parent.
consider the eer diagram for a car dealer in the figure below. map the eer schema into a set of relations. for the
Which is not a factor to consider in software evaluation?
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