It is also interesting to note that the first system that was sold in the form of an RDBMS was the Multics Relational Data Store which was in 1978. The majority of commercial DBMSs are known to use SQL as their
Data from a database object are processed. Transaction information for a set of data of the database object is stored separate from the set of data in an allocated storage space, wh
For example, if a storage region is known to contain records with column values between 100 and 200 (i.e., col 1 {100, 200}), then a query restricted to records with column values greater than 500 will not read that storage region. In contrast, an index provides a pointer to a reco...