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Learn more about data cleansing
Data-driven decisions are crucial to modern business; however, if your data sources contain errors or if there are inconsistencies between them, your decision making will likely be impacted. Data cleansing is necessary when integrating heterogeneous data sources due to the benefits it provides: you can ensure that data arrives in your data warehouse uniform and ready to query, and give yourself the power to correct data integrity problems before they impact decision making.
Despite your best efforts, data from each of your sources may contain misspellings, mis-fielded information, duplicate records or even contradictory or incorrect information.
Some examples of data cleansing include:
- Data record deduplication;
- Data matching (Do records in a common dataset share a common format?);
- Removing garbage or nonsense values;
- Removing null values;
- Removing errors;
- Enrichment of data with supplementary data, e.g. geodata or timestamps;
- Confirming data like addresses, URLs, etc.;
- Fixing records according to a predefined ruleset.
Data cleansing should not occur in isolation, but in conjunction with other data transformations.
If you’re in a business attempting to build and maintain a data-centric decision making process, data cleansing remains a significant challenge. The experts at Alooma are here to help.