How in a relation a supertype or subtype is mapped
Explain how in a relation a supertype or subtype is mapped?
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A separate relation is created for each and every supertype and subtype. The attributes general for all of the subtypes are allocated to the supertype. Each and every subtype has the primary key from the supertype assigned to it. A subtype discriminator is added to the supertype.
How teradata ensures that there are no duplicate rows being inserted while this SET table?
Illustrate the difference between the data warehousing and OLAP?
Another company used statistic in reports is the total number of orders placed by a shopper. Complete the following steps to create a function named NUM_PURCH_SF that accepts a shopper id and returns the total number of orders the shopper has placed. Use the function in a SELECT statement to display
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States the term Global temporary.
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Illustrates the cursors in brief?
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