In a star schema, are foreign key constraints between facts and dimensions neccessary?
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1.WHAT IS DATA MART ?
Explain er diagram?
Difference between DSS & OLTP?
What is data mart in data warehouse?
What is source qualifier?
how much memory space occupied real time project (roughly)?
What is informatica architecture?
What is meta data and system catalog?
What is data stream and data adaopter?
Explain what is difference between query studio and report studio?
What is called dimensional modelling?
Explain in detail abt measure objects? And what is the use of it? How to create it?