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what do you mean by primary key constraint?
Define the terms i) Entity type ii) Entity set Entity type: An entity type describes a collection of entities that have the similar attributes. Entity set: The set of all en
When It is better to use files than a DBMS? It is better to use files than a DBMS when Multiple users wish to access the data.
Mention the purpose of SID and SOD lines SID (Serial input data line): It is an input line by which the microprocessor accepts serial data. SOD (Serial output data line)
Describe Parameteric end users? Parametric end users might be given update access, but are commonly not permitted to change the structure of data.
How to design a formal and exact model How to design a formal and exact model of real-world problems by applying findings of analysis phase of OMT. The object design phase find
Define Thomas write rule Thomas' write rule: The Thomas' write rule is a modification of timestamp-ordering protocol for concurrency control. Assume that transaction T i issue
external and internal mapping with examples
INTRODUCTION Databases and database systems have become an essential part of our daily life. We encounter many activities that involve some interaction with a database almost
sir, could anybody help me in getting complete information about the mentioned topic
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