Big Data refers to the large amounts of data which is flowing in from various data sources and have different formats. Even previously there was huge data that were being stored in databases, but because of the varied nature of this Data, the traditional relational database systems are incapable of handling this Data. Big Data is much more than a collection of datasets with various formats, it is a significant resource which can be utilized to get enumerable advantages.
The three different formats of big data are:
Structured: Organised data format with a fixed schema. Ex: RDBMS Semi-Structured: Partially sorted out information which doesn't have a fixed format. Ex: XML, JSON Unstructured: Unorganised data with an unknown schema. Ex: Audio, video files etc.