In the previous chapter, we discussed top-down distributed database design, which is suitable for tightly integrated, homogeneous distributed DBMSs. In this chapter, we focus on bottom-up design that is appropriate in multidatabase systems. In this case, a number of databases already exist, and the design task involves integrating them into one database. The starting point of bottom-up design is the individual local conceptual schemas. The process consists of integrating local databases with their (local) schemas into a global database with its global conceptual schema (GCS) (also called the mediated schema).
CITATION STYLE
Özsu, M. T., & Valduriez, P. (2011). Database Integration. In Principles of Distributed Database Systems, Third Edition (pp. 131–169). Springer New York. https://doi.org/10.1007/978-1-4419-8834-8_4
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