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What is transaction?
Collections of operations that form a single logical unit of work are known as transactions.
In E-R Diagram how relationship type is represented ? In E-R Diagram relationship type is represented as a Diamond.
Given the following relations TRAIN (NAME, START, DEST) TICKET (PNRNO., START, DEST, FARE) PASSENGER (NAME, ADDRESS, PNRNO.) Write SQL expressions for the following queries: No
Law Associates is a large legal practice based in Sydney. You have been asked to design a data model for the practice based upon the following specification: The practice employs
Which is the properties of entities? Attributes is the properties of entities.
Define the Wait for graph Ans: The wait-for-graph is a directed graph and consist of nodes and directed arcs; the nodes of the graph are active transactions. An arc of the grap
Define the term Domain. For each n every attribute there is a set of permitted values known as the domain of that attribute.
Which database object does not physically exist? A view database object does not physically exist.
Example - ALTER TABLE emp MODIFY (empno NUMBER (7));
The clause in SQL which specifies that the query result should be sorted in ascending or descending order based upon the values of one or much more columns is Ans : Order by
Control as a State Machine Engine First let us define the state machine: "the state machine is a machine which is an object but not an application object. It is a part of lang
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