Does Data Science include working knowledge of Big Data


Hi Guys

I am new here. I am interested in this Big Data space ever since I came to know about it around March this year. I am planning to take up Business Analytics course and have checked out option like ISB CBA , Great Lakes PGPBA. My question is that these course say they are Business Analytics course and analytics as far as I know is not a new field of work. The whole analytics world was shaken with the advent of big data if I am not wrong. With big data large volume of data can be processed. Now why then it is said that to become a Data Scientist we need not know Big data ? After all how is it possible to get insights from such huge amount of data ? Please advise.