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What are the different kinds of database end users? Discuss the major activities of each?
End-Users - End-users are the people whose jobs need access to the database for querying, updating, and generating reports; the database first and foremost exists for their use. The different types of end-users are:
Casual end-users - occasionally access the database, required different information each time
Naive or Parametric end-users - includes tellers, clerks, etc., make up a sizable portion of database end-users, major job function revolves around constantly querying and updating the database
Sophisticated end-users - involves engineers, scientists, business analyst, etc., use for their complex requirements
Stand-alone users - manage personal databases by using ready-made program packages, gives easy-to-use menu-based or graphics-based interfaces
The PROJECT operation The project operation is used to choose the records with specified attributes as discarding the others based on some related criteria. This is denotes as ∏
Improved Reliability: In a centralised DBMS, a server failure stops the operations of the DBMS. Though, a failure at single site of a DDBMS, or a failure of a communication link cr
Fourth Normal Form (4NF) When attributes in a relation have multi-valued dependency, further Normalization to 4NF and 5NF are needed. Let us first find out what multi-valued d
limitations and benefits in database tecknowlagy
Question: (a) Can a set of data requirements be correctly modelled by two or more different ER diagrams? Explain your answer. You may use a small example, if you think it will
What is the full form of ODBC ? ODBC stands for Open Database Connectivity.
What are audit trails? An audit trail is a log of all alters to the database along with information like which user performed the change and when the alter was performed.
What is the max. no. Of structures that can be included in a table or structure. Nine.
What are called multilevel indices? Indices with two or more levels are known as multilevel indices.
What is disadvantage of multiple inheritances? There is potential ambiguity if the similar variable or method can be inherited from more than one superclass.eg: student class m
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