Jämför metoder
Granska de valda metoderna sida vid sida; rader som skiljer sig är markerade.
| Datafederation× | Frågeoptimering× | |
|---|---|---|
| Ämnesområde | Informationssystem | Informationssystem |
| Familj | Process / pipeline | Process / pipeline |
| Ursprungsår≠ | 1990 | 1979 |
| Upphovsperson≠ | Amit Sheth and Paul Larson | IBM San Jose Research Laboratory |
| Typ≠ | Database integration architecture | Database optimization technique |
| Ursprungskälla≠ | Sheth, A. P., & Larson, P. A. (1990). Federated database systems for managing distributed, heterogeneous, and autonomous databases. ACM Computing Surveys, 22(3), 183-236. DOI ↗ | Jarke, M., & Koch, J. (1984). Query optimization in database systems. ACM Computing Surveys, 16(2), 111-152. DOI ↗ |
| Alias≠ | federated systems, distributed query | — |
| Närliggande≠ | 1 | 2 |
| Sammanfattning≠ | Data federation is an approach to integrating data from heterogeneous, autonomous, distributed databases without requiring centralized storage. Formalized by Sheth and Larson in 1990, federated systems provide a unified interface to query multiple independent sources while preserving their autonomy and existing schemas. | Query optimization is a critical process in database management that transforms high-level SQL queries into efficient execution plans. Developed systematically by IBM researchers in the late 1970s, it aims to minimize execution time, disk I/O, and resource consumption by selecting the most effective access paths and join strategies. |
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