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(a) What is a Sub-Query?
(b) What is the difference between a scalar sub-query and a tabular sub-query?
(c) Write an equivalent SQL statement to get the Name of Product which has the same price list as the Chainring Bolts. Use the following relational schema to answer this question: Production.Product (ProductID, PName, ListPrice)
(d) Convert the following SQL Statement to display the same result by using a sub-query instead of the join.
SELECT p.Name, p.ProductNumber FROM Production.Product p JOIN Sales.SalesOrderDetail AS sod ON p.ProductID = sod.ProductID WHERE sod.OrderQty > 41
(e) SQL Server may produce unexpected results when performing calculations on columns that have NULL values. So, to resolve this problem you need to use the ISNULL, NULLIF, and COALESCE functions of SQL Server 2005 when your columns hold NULL values. Explain briefly the purpose of each of the above function and support your answer with an appropriate example.
Creating views with check option : This option limits those updates of data values that cause records to go off the view. The following instance tells this in more detail: Examp
why shadow copy technique is used?
In which form of relational database developer refers to a record? In a tuple form of relational database developer refers to a record.
3NF Normal Form A relation schema R is in 3NF if it is in 2NF and for each FD X A either of the following is true X is a Super-key of R. A is a prime attribute of R
Question: (a) One of the steps in the five-step problem-solving model is implementation. Implementation is considered a key step in the problem-solving model. A problem may be
Describe the term- State Diagram State Diagram: An object could receive a sequence of the input instructions. The state of the object can differ depending upon sequence of in
What is schema
what is union compatable?
Describe Physical Data independence ? Physical Data Independence - It is capacity to modify the internal schema without having to change conceptual schema. Therefore, the exter
Decompose the table with the following description and functional dependencies into a set of equivalent tables normalized to 3NF or BCNF. A long-standing international treaty am
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