A database is an organized collection of data, stored and accessed electronically, usually via a computer system. A database can be small or large, simple or complex depending on the situation. It can contain any type of information, such as financial records, customer data, or multimedia files, and is a critical component of many computer systems.
Big data is a field that treats ways to analyze, systematically extract information from, or otherwise deal with data sets that are too large or complex to be dealt with by traditional data-processing application software. It often involves advanced tools like machine learning, Hadoop, or Spark, enabling businesses to uncover hidden patterns and valuable insights efficiently.