1661

Author: OmPreetham

1661-average-time-of-process-per-machine.sql

@@ -0,0 +1,17 @@
+# Write your MySQL query statement below
+SELECT 
+    a1.machine_id,
+    ROUND(AVG(a2.timestamp - a1.timestamp), 3) AS processing_time
+FROM 
+    Activity a1,
+    Activity a2
+WHERE 
+    a1.machine_id = a2.machine_id
+AND 
+    a1.process_id = a2.process_id
+AND
+    a1.activity_type = 'start'
+AND
+    a2.activity_type = 'end'
+GROUP BY 
+    machine_id;