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What are the advantages of by using an index and what are its disadvantages ? In difference, if the search key of a secondary index is not a candidate key, it is not sufficient
Find the names of all Albums that have more than 30 tracks. Result: (name: varchar(255))
What is NULL? Simply NULL means not in value.
Chapter 10a review questions
Control Files : The redo and control files logs support the rest of the architecture. Every database must have at least one control file, although you have more than one to guard
What type of view of total database content? Data base content Conceptual view of total database contain.
Rules Of Data Normalisation Let us now summarise Normalisation with the help of various clean rules. The following are the necessary rules for the Normalisation process: 1.
sql is relationally complete-justify
Query Processor The query language processor is responsible for taking query language statements or shifting them from the English-like syntax of the query language to a form
With the linear commit protocol, sites are connected in a chain, and the subtransaction at the left-hand end of the chain initiates the protocol. Propose a crash recovery protocol
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