To drop a primary key column from a table the primary key constraint must first be dropped, but this does not require that related foreign keys based on the column be dropped
Indicate whether the statement is true or false
FALSE
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Which of the following would likely be a primary key in a purchases table?
A. Purchase_Order_Number. B. Purchase_Order_Date. C. Supplier_Number. D. Product_Description.
According to the text, what is an ethical responsibility of a research agency?
A) To use all forms of data, as well as data obtained from any source - internal or external. B) Discussion about all issues surrounding the relevance and accuracy of the secondary data used with the client should be done only when required by law. C) After a detailed analysis of secondary data has been conducted, the researcher should reexamine the collection of primary data stipulated in the proposal. D) Privacy related to the client's issues are not as important as safe keeping of the client's databases. E) B and D are valid statements.
Explain the economic law of diminishing returns.
What will be an ideal response?
Unsatisfactory responses uncovered in the editing stage of the data-preparation process are commonly handled by doing any of the following except ________
A) recoding unsatisfactory responses B) assigning missing values C) discarding unsatisfactory responses D) returning to the field to get better data