MIS562 Week 7 Assignment Correct Answers | Database Management and SQL Solutions

MIS562 Week 7 Assignment Correct Answers
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Homework (100 points)

For Part 1 Q1, you don’t need to run SQL and no output is required.

For Part 1 Q2, be sure to include output

For part 2 running stored procedure, please refer to document under Announcement. You
must include output for all three questions

Part 1

Question SQL statement or Answer

1. Analyze the following query and write a description of the output it produces. (20

points) Do not run query.

Determine the total capacity for courses and display courses with the capacity of 20 or less,
between 21 and 30 and over 31 in three columns.

The results show there are two courses capacity is below 20, 10 between 21 and 30 and 16
over 31.

SELECT COUNT(DECODE(SIGN(total_capacity-20), -1, 1, 0, 1)) "<=20",

COUNT(DECODE(SIGN(total_capacity-21), 0, 1, -1, NULL,

DECODE(SIGN(total_capacity-30), -1, 1)))"21-30",

COUNT(DECODE(SIGN(total_capacity-30), 1, 1)) "31+"

FROM

(SELECT SUM(capacity) total_capacity, course_no

FROM section

GROUP BY course_no)



You don’t need to execute SQL Query and you are not required to provide executed output


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