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LaoPrimary resources are original materials that provide firsthand information, while secondary resources analyze, interpret, or summarize primary sources. Primary sources include documents, photographs, or artifacts created at the time of an event, while secondary sources are created after the fact and provide analysis or commentary.
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What is the difference between a Primary Key and a Secondary Key?
A Primary Key is a unique identifier for each record in a database table and is used to enforce entity integrity. A Secondary Key is a non-unique index that is used for querying and organizing data efficiently but does not have the constraint of uniqueness.
What is a secondary resources?
secondary resource- are usually published by books or articles by authors who were not eyewitnesses of participants.
Explain the difference between primary data and secondary data give an example of each?
Primary data is data collected firsthand, through surveys, interviews, experiments, etc. by the researcher, while secondary data is existing data that has already been collected by someone else. An example of primary data would be survey responses collected by a marketing team for a new product. An example of secondary data would be industry reports or census data obtained from a government website.
What is the difference between primary key and secondary key in database?
A primary key is a unique identifier for each record in a database table and is used to ensure data integrity and enforce entity integrity. A secondary key, also known as a candidate key, is an alternate unique key that can be used to identify records, but is not designated as the primary key.
What is the difference between primary and secodary research?
Primary research involves collecting data directly from original sources through methods like surveys or experiments, while secondary research involves gathering information from existing sources like books or articles. Primary research is more time-consuming and expensive but offers firsthand insights, while secondary research is quicker and less costly but may not address specific research needs as directly.
