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1. Create the tables for the play-scheme database as specified in the TMA. 2. Enter the data as given in the spreadsheet. 3. Create queries to retrieve specified information
What is a block and a block number? A block is a contiguous sequence of sectors from a single track of one platter. Every request specifies the address on the disk to be refere
what are the reasons having variable length records
What is a primary index? A primary index is an index whose search key also explains the sequential order of the file.
Explain four causes for failures in data warehouse projects
in an organization several projects are undertaken. Each project can employ one or more employees. Each employee can work on one or more projects. Each project is undertaken on the
Give the levels of data abstraction? There are three levels of Data Abstraction a) Physical level b) logical level c) view level
What are domain constraints? A domain is a set of values that might be assigned to an attribute .all values that appear in a column of a relation must be taken from the similar
What is the difference between a key and a superkey? Key - A key a single attribute or a combination of two or more attributes of an entity set which is used to identify one
write on the various type of relationalkey
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