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Horizontal Fragmentation- Horizontal fragmentation groups together the tuples in a relation that are collectively used by the main transactions. A horizontal fragment is produced b
Explain Domain calculus Domain calculus is one of the types of the relational calculus. The formal specification of the domain calculus was planned after the development of the
What are the three classes of SQL expression? SQL expression consists of three clauses: Select From Where
explain cascading rollback
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 is schema
The functions of DBA ?
What are the two distinct aspects to the implementation of associations? i) It is required to define data declarations which will enable details of actual links to be stored. I
What was the method in which records are physically stored in a specified order according to a key field in each record ? A method in which records are physically stored within
A database administrator''s responsibilities and data contents
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