Primary data refers to the first hand data gathered by the researcher himself. Secondary data means data collected by someone else earlier.

  Primary data is the type of data that is collected by researchers directly from main sources while secondary data is the data that has already been collected through primary sources and made readily available for researchers to use for their own research.

    The secondary data made available to researchers from existing sources are formerly primary data that was collected for research in the past. The availability of secondary data is highly dependent on the primary researcher's decision to share their data publicly or not.

   primary data is collected from the main source of data, while secondary data is no