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Quick Check 4.5 – Data 100, Summer 2020
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Consider the following tables for this quick check:
Which of the following is the output of the following query: SELECT COUNT(rating) from Sailors;
*
3
4
5
Which of the following is the output of the following query: SELECT COUNT(*) from Sailors;
*
3
4
5
Which of the following is the output of the following query: SELECT AVG(rating) from Sailors;
*
5.4
6.75
0
NULL
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