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Explain I command in QBE ?
I : It is the command in QBE that is used to insert tuple (s) into the database
Process-oriented decompositions Process-oriented decompositions divide complex process, task or function into simpler sub processes until they get simple enough to be deal
intent locking
Explain mechanism of nested queries? SQL gives a mechanism for nesting subqueries. A subquery is a select from where expression that is nested within one more query. A common u
Sequential File Organisation The most necessary way to organise the collection of records in a file is to use sequential Organisation. Records of the file are stored in series
What is Primary key? Primary Key - Primary key is one of the candidate keys which uniquely identifies each row in the relation.
client server architeutre
1. Determine that the Checkpoints are a part of Ans: Checkpoints are a part of Recovery measures
Update Operations and Dealing with Constraint Violations There are three basic operations to be executes on relations: Insertion Deletion Update The INSER
Discuss the methods for a hash file to expand and shrink dynamically. What are the advantages and disadvantages of each? The hashing methods that permit dyanamic file expansi
Define blocks? The database system resides eternally on non-volatile storage, and is into fixed-length storage units known as blocks.
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