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Author: sayandip20

1292-immediate-food-delivery-ii/immediate-food-delivery-ii.sql

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+# Write your MySQL query statement below
+SELECT
+    ROUND(100*SUM(CASE WHEN order_date = customer_pref_delivery_date THEN 1
+    ELSE 0 END)/ COUNT(distinct customer_id) ,2) AS immediate_percentage
+FROM
+    Delivery
+WHERE
+    (customer_id, order_date)
+IN
+(SELECT
+    customer_id, min(order_date) as min_date
+FROM
+    Delivery
+GROUP BY
+    customer_id
+);