Queries for SQL OVER() Clause (#210)

* Queries for SQL OVER() Clause

* Update over-clause-with-rows.sql

Author: haroon445

sql-queries-5/sql-over-clause/over-clause-with-group-by.sql

@@ -0,0 +1,5 @@
+SELECT enrollment_date,
+MAX(gpa) AS highest_gpa,
+MIN(gpa) AS lowest_gpa
+FROM Student
+GROUP BY enrollment_date;

sql-queries-5/sql-over-clause/over-clause-with-order-by.sql

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+SELECT id, semester, grade,
+MAX(grade) OVER (PARTITION BY student_id ORDER BY grade) AS course_highest,
+MIN(grade) OVER (PARTITION BY student_id ORDER BY grade) AS course_lowest
+FROM Exam
+ORDER BY course_id;

sql-queries-5/sql-over-clause/over-clause-with-partition-by.sql

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+SELECT name, position,
+COUNT(*) OVER (PARTITION BY name) AS Total_Positions
+FROM Faculty;

sql-queries-5/sql-over-clause/over-clause-with-rows.sql

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+SELECT id, enrollment_date,
+AVG(gpa) OVER (ORDER BY enrollment_date ROWS BETWEEN 2 PRECEDING AND CURRENT ROW) AS Avg3GPAs,
+AVG(gpa) OVER (ORDER BY YEAR(enrollment_date) RANGE BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW) AS AvgGPAYearOverYear
+FROM Student
+ORDER BY enrollment_date, id;