Completed MockSQL2

README.md

@@ -1 +1,58 @@
-# Mock_SQL2
+# Mock_SQL2
+
+1: Write a solution to report the customer ids from the Customer table that bought all the products in the Product table.
+
+Return the result table in any order.
+
+
+---------------------------------------------------------------------------------------------------------
+
+
+SELECT DISTINCT CustomerId
+FROM Sales s1
+WHERE NOT EXISTS (
+    SELECT ProductId
+    FROM Sales s2
+    WHERE NOT EXISTS (
+        SELECT *
+        FROM Sales s3
+        WHERE s3.CustomerId = s1.CustomerId AND s3.ProductId = s2.ProductId
+    )
+)
+
+
+
+
+---------------------------------------------------------------------------------------------------------
+
+
+2: 
+
+Write a solution to find all sales that occurred in the first year each product was sold.
+
+For each product_id, identify the earliest year it appears in the Sales table.
+
+Return all sales entries for that product in that year.
+
+Return a table with the following columns: product_id, first_year, quantity, and price.
+Return the result in any order.
+
+
+
+
+---------------------------------------------------------------------------------------------------------
+SELECT Product_ID, 
+       SUM(Quantity) AS Total_Sales
+FROM Sales
+GROUP BY Product_ID
+ORDER BY Product_ID;
+
+
+
+
+
+---------------------------------------------------------------------------------------------------------
+
+
+
+