Data cleansing refers to the removal of redundant data, missing data and null records from a set. This may include standardizing data fields or combining duplicate records. Data cleansing may also involve transforming data into a structured format. The use of data warehouses, which store and organize data from various sources, is an example.
Data cleansing involves removing redundant data, null records, missing values, and other irregularities from a data set. You may also need to standardize fields and combine duplicate records. Data cleansing might also mean transforming data into structured formats. An example would be the data warehouse which holds data from multiple sources, then optimizes them for analysis.
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Data cleansing allows for more data to be added and improves accuracy without having to delete any information. ETL, or data integration, is the process of combining data from different sources to create a standard data store. This lands the data into a data warehouse or data lake, as well as any other destination.