diff --git a/sql-queries-7/rolling-average/rolling-average-mssql.sql b/sql-queries-7/rolling-average/rolling-average-mssql.sql
new file mode 100644
index 00000000..2c330802
--- /dev/null
+++ b/sql-queries-7/rolling-average/rolling-average-mssql.sql
@@ -0,0 +1,6 @@
+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);
diff --git a/sql-queries-7/rolling-average/rolling-average-mysql.sql b/sql-queries-7/rolling-average/rolling-average-mysql.sql
new file mode 100644
index 00000000..79f07da0
--- /dev/null
+++ b/sql-queries-7/rolling-average/rolling-average-mysql.sql
@@ -0,0 +1,6 @@
+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;
diff --git a/sql-queries-7/rolling-average/rolling-average-postgre.sql b/sql-queries-7/rolling-average/rolling-average-postgre.sql
new file mode 100644
index 00000000..cf1ff008
--- /dev/null
+++ b/sql-queries-7/rolling-average/rolling-average-postgre.sql
@@ -0,0 +1,5 @@
+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;
diff --git a/sql-queries-7/rolling-average/rolling-average.sql b/sql-queries-7/rolling-average/rolling-average.sql
new file mode 100644
index 00000000..af63d5c6
--- /dev/null
+++ b/sql-queries-7/rolling-average/rolling-average.sql
@@ -0,0 +1,4 @@
+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;
diff --git a/sql-queries/calculate-running-total/running-total.sql b/sql-queries/calculate-running-total/running-total.sql
new file mode 100644
index 00000000..98eaac69
--- /dev/null
+++ b/sql-queries/calculate-running-total/running-total.sql
@@ -0,0 +1,14 @@
+SELECT id, scores, SUM(scores)
+OVER (ORDER BY id) AS RunningTotal
+FROM Exam;
+
+
+SELECT id, scores, (SELECT SUM(scores)
+                    FROM Exam e2 WHERE e2.id <= e1.id) AS RunningTotal
+FROM Exam e1 ORDER BY id;
+
+
+SELECT s1.id, s1.scores, SUM(s2.scores) AS RunningTotal
+FROM Exam s1
+JOIN Exam s2 ON s1.id >= s2.id
+GROUP BY s1.id, s1.scores ORDER BY s1.id;