Modeling ETL data quality enforcement tasks using relational algebra operators
Usually, a data warehouse is refreshed periodically with data gathered from disparate source systems. Nevertheless this data might not be fully accurate, probably containing serious data quality problems, such as uniqueness, misrepresentations, null values, multi-purpose fields, or inconsistent valu...
| Autor principal: | |
|---|---|
| Outros Autores: | |
| Formato: | conferencePaper |
| Idioma: | eng |
| Publicado em: |
2013
|
| Assuntos: | |
| Texto completo: | http://hdl.handle.net/1822/37418 |
| País: | Portugal |
| Oai: | oai:repositorium.sdum.uminho.pt:1822/37418 |