Datawarehouse Case studies, Database Management System

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I have been given 8 differebt data warehouseing failure case studies. I need to question 4 questions for each

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Attribute Preservation This is a easy and obvious necessity that includes preserving all the attributes that were there in the relation that is being decomposed.

Define the term- having clause and a where clause, What is the difference ...

What is the difference between a HAVING CLAUSE and a WHERE CLAUSE? HAVING CLAUSE - HAVING CLAUSE is used only with SELECT statement. - It is normally used in a GROUP BY

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