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What is transaction?
Collections of operations that form a single logical unit of work are known as transactions.
Explain Relational model and their use in DBMS? Relational Model - The relational model was first introduced through E.F. Codd of the IBM Research in the year of 1970. The mode
Define what Immediate database modification technique uses? Ans: Both undo and redo.
what is query processing ,query optimization and performance turring?
1. Based on the dependency diagram, create a database whose tables are in at least 2NF, showing the dependency diagram for each table (as shown in class). Label the types of depe
Extend your CREATE TABLE statement from problem 3 with referential integrity constraints. Updates and deletes on related rows are restricted. 6. From examination of the sample data
vertical fragmentation
Explain the Strategy of Database Planning ?
It is mandatory that for every table in the LDB hierarchy there should exist one GET statement in the report. False. It is not essential.
Process to find the non-concurrent objects Once we find out non-concurrent (mutually exclusive) objects, we can fold all objects together in one thread of process or control. O
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
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