Calculate Rolling Average

sql-queries-7/rolling-average/rolling-average-mssql.sql

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+CREATE VIEW v_DailyEnrollmentWithAvg
+  WITH SCHEMABINDING AS
+  SELECT date, total_registrations, AVG(total_registrations) OVER ( ORDER BY date ROWS BETWEEN 6 PRECEDING AND CURRENT ROW )
+  AS rolling_avg_7_days
+  FROM DailyEnrollment; 
+GO CREATE UNIQUE CLUSTERED INDEX idx_DailyEnrollmentWithAvg ON v_DailyEnrollmentWithAvg (date);

sql-queries-7/rolling-average/rolling-average-mysql.sql

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+CREATE EVENT update_rolling_avg
+  ON SCHEDULE EVERY 1 DAY
+  DO REPLACE INTO DailyEnrollmentRollingAvg
+  SELECT date, total_registrations, AVG(total_registrations) OVER ( ORDER BY date ROWS BETWEEN 6 PRECEDING AND CURRENT ROW ) 
+  AS rolling_avg_7_days
+  FROM DailyEnrollment;

sql-queries-7/rolling-average/rolling-average-postgresql.sql

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+CREATE MATERIALIZED VIEW RollingAvgEnrollment
+  AS SELECT date, total_registrations, ROUND(AVG(total_registrations) OVER ( ORDER BY date ROWS BETWEEN 6 PRECEDING AND CURRENT ROW ), 2)
+  AS rolling_avg_7_days
+  FROM DailyEnrollment
+  ORDER BY date;

sql-queries-7/rolling-average/rolling-average.sql

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+SELECT date, total_registrations, AVG(total_registrations)
+  OVER ( ORDER BY date ROWS BETWEEN 6 PRECEDING AND CURRENT ROW ) AS rolling_avg_7_days
+  FROM DailyEnrollment
+  ORDER BY date;