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22319 Lecture Notes - Database, Data Redundancy, Data Integrity

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shreyasshirsath095

31 Mar 2023

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Sandip University

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Document Summary

1. 1 concept of data, database, dbms, advantages of dbms over file processing system, application of database. 1. 3 data abstraction: levels, instance and schema, data independence- logical and physical independence. 1. 5 data modeling: record based logical model-relational, network, hierarchical. 1. 6 data modeling using e-r model, strong entity set, weak entity set, types of attributes, e-r diagrams: define dbms: The database management system can be defined as collection of interrelated data & set of program / tools to operate on it: name of various dbms & rdbms software: Domain: domain can be defined as set of permitted value for a particular attribute. 1. 4 list 12 rules of fully functional rdbms: 04 marks. The whole data should represent to the user in the form table. The complete data should available or accessible to the user without any ambiguity. The ambiguity should can avoid only by a strong combination of table name, primary key column name.

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Related Questions

Define Database management system?

Whooping cough vaccine: Some parents fear that vaccinations may have adverse long-term effects on their children's health. In 2009, the Joumal of the American Academy of Pediatrics published research on a routine childhood vaccine for whooping cough. The researchers studied 6,811 children born between 1993 and 1997 in Leicestershire, UK. Parents answered questions over a period of more than 10 years about their children's respiratory symptoms. Researchers then linked this data to independently collected vaccination data from the National Health Service database. They divided the children into groups based on vaccine history (complete vaccines, partial vaccines, no vaccines) and compared respiratory symptoms. The study provided no evidence that vaccinated children were more likely to have respiratory problems such as wheeze and asthma.

Students in a statistics class were asked to summarize the results of this study. Which of the student statements is an appropriate summary? Check all that apply.

◻ Vaccinating infants against whooping cough is not associated with a greater incidence of wheeze and asthma in later life.

◻ Vaccinating against whooping cough does not increase the risk of wheeze and asthma in later life.

◻ Whooping cough vaccinations are not linked with respiratory problems, such as wheeze and asthma, in later life.

◻ Whooping cough vaccinations do not cause respiratory problems, such as wheeze and asthma, in later life.

Check all the apply please tell me which one I can view the photo

Whooping cough vaccine: Some parents fear that vaccinations may have adverse forng-tem effects on their children's health. In 2009, the Journal of the American Academy of

Pediatrics published research on a routine childhood vaccine for whooping cough. The researchers studied 6,811 children born between 1993 and 1997 in Leicestershire, UK. Parents answered questions over a period of more than 10 years about their children's respiratory symptoms.

Researchers then linked this data to independently collected vaccination data from the National Health Service database. They divided the children into groups based on vaccine history (complete vaccines, partial vaccines, no vaccines) and compared respiratory symptoms. The study provided no evidence that vaccinated children were more likely to have respiratory problems such as wheeze and asthma.

Students in a statistics class were asked to summarize the results of this study. Which of the student statements is an appropriate summary? Check all that apply.

◻ Vaccinating infants against whooping cough is not associated with a greater incidence of wheeze and asthma in later Be.

◻ Vaccinating against whooping cough does not increase the risk of wheeze and asthma in later life.

◻ Whooping cough vaccinations are not linked with respiratory problems, such as wheeze and asthma, in later life.

◻ Whooping cough vaccinations do not cause respiratory problems, such as wheeze and asthma, in later life.