Explain difference between data ware house & data mart?
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How are the dimension tables designed?
How can we acheive correlated sub-query in designer?can anyone help me in this regard?
What is an OLAP (On-line Analytical processing) system?
Suppose we have some 10,000 odd records in source system and when load them into target.how do we ensure that all 10,000 records that are loaded to target doesnt contain any garbage values?
What is the difference between Oracle Express and Oracle Discoverer?
How can you clear the cache?
Explain what is the difference between a primary and secondary actor in use case modeling?
Can we take backup when the database is opened?
Explain functional dependency?
What is surrogate key? Explain with examples.
What is the difference between filter and lookup transformation?
Ist the schema that a data warehouse system can implements.