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One side effect of normalization is that you often need more than one table to get meaningful results. For example, you may have a table that includes a list of parts and the ID number for the vendor of each part. To find the name or phone number of the vendor, you would have to consult a table that contains vendor information. In many situations, either a join or a nested query will provide the information you need. Sometimes only one approach works, or one approach is better than the other one.
With these thoughts in mind, address the following:
What are the advantages and disadvantages of joins and nested queries?
Identify specific situations in which each technique would be preferred over the other.
Explain your reasoning.
Write the name(s) of employee(s) who works(work) on every project located in Houston. Write the name(s) of employee(s) who only works(work) on every project located in 'Houston.'
Design a dimensional model for analysing Purchases for Adventure Works Cycles and implement it as cubes using SQL Server Analysis Services. The AdventureWorks OLTP sample database is the data source for you BI analysis.
Write down the SQL code in order to carrying out the following requests. Display all the data in each of the four tables. Do not display the foreign key columns.
Describe the database and describe the four characteristics of the database? Explain the Relational Database and generate a relational database for five employees.
MGMT321 Group Project: Create the following documents for the proposed system and deliver each SDLC documents by the end of each designated module, as shown below
Express given five loosely described problems carefully in { Instance, Question } form as utilized in "Computers and Intractability". Determine that a list of n numbers has no duplicates.
These comprise NOT NULL, CHECK, UNIQUE, REFERENTIAL INTEGRITY, and PRIMARY KEY constraints. Are these constraints which we are talking about easy to implement in Access Database?
Suggest how to implement direct-address table in which keys of stored elements don't require to be distinct and elements can have satellite data.
In 500 words or less, trace the history of the development of databases beginning with pre-computer days to the present.
Design a work breakdown structure for the task below: Designing the database, Working on the website content
University XYZ needs a database that keeps track of students, what classes they taken and the grades for each of the classes.
You have a file which contains credit card records. Each record contains field for the card number, expiration date, and name of card holder. Explain what primary problem you try to solve is.
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