Big Data – Blog by YY
Data, as the core factor in Data world. We might wonder whether there is criterion existed before everything getting started. What I meant “ everything getting started “ is the process of ETL, data deposit into DataBases(DBs)/DataWarehouses(DWs), and, of course, the afterwards analysis against the source we currently have.
The answer is “ YES “ and that is the topic I will introduce, “ Data Quality. “
Why it is important, because “ Quality data “ means “ USEFUL DATA, “ meaning data must be consistent and unambiguous. Data that is not high quality can undergo data cleansing to raise its quality.