What is data modelling
What is meant by the data modelling?
Expert
Data modelling represents the real world set of the data structures or entities and their relationship in their data models, needed for database.
There exist various types of modelling:
a) Logical data modelling. b) Conceptual data modelling. c) Physical data modelling. d) Relation data modelling. e) Enterprise data modelling. f) Dimensional data modelling.
Give definition of data structure?
Describe in brief about the Sybase group?
Illustrates the definition of Economics?
Clarify briefly why dimension tables is de-normalized in the nature?
What is meant by the parameter file?
Briefly describe the differentiation between data warehouse and OLAP?
Write out the disadvantages of using the Alias?
Elucidate briefly power center repository?
Explain the Data Transformation Manager (DTM)?
Explain terms Procedure Cache in Sybase. Answer: It is the memory area where compiled query tree run for example: procedure and batch query.
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