assignment exercise.sql_join-and-group

sqlJoinsPart1.sql

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+/*Part 1
+Write a query to display each customer’s name (asCustomer Name) alongside the name of the employee
+who is responsible for that customer’s orders.
+The employee name should be in a single Sales Rep column formatted as lastName, firstName. 
+The output should be sorted alphabetically by customer name.*/
+
+SELECT c.customerName AS "Customer Name", CONCAT (e.lastName, ' ', e.firstname) AS "Sales Rep"
+FROM customers c INNER JOIN  employees e
+ON c.salesRepEmployeeNumber = e.employeeNumber
+ORDER BY c.customerName ASC; 

sqlJoinsPart2.sql

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+/*Part 2
+Determine which products are most popular with our customers.
+For each product, list the total quantity ordered along with the total sale generated 
+(total quantity ordered * priceEach) for that product.
+The column headers should be Product Name, Total # Ordered and Total Sale.
+List the products by Total Sale descending.*/
+
+SELECT p.productName AS "Product Name", SUM(od.quantityOrdered) AS "Total # Ordered", (SUM(od.quantityOrdered)*od.priceEach) AS "Total Sale"
+FROM products p 
+JOIN orderdetails od
+ON p.productCode = od.productCode
+GROUP BY p.productName
+ORDER BY SUM(od.quantityOrdered)*od.priceEach DESC;
+
+/*SELECT p.productName AS "Product Name", COUNT(p.productCode) AS "Total # Ordered", (COUNT(p.productCode) * od.priceEach) AS "Total Sale" 
+FROM customers c, orders o, orderdetails od, products p
+WHERE c.customerNumber = o.customerNumber
+AND o.orderNumber = od.orderNumber
+AND od.productCode = p.productCode
+GROUP BY p.productCode
+ORDER BY "Total Sale" DESC;*/
+/*SELECT p.productName AS "Product Name", SUM(od.quantityOrdered) AS "Total # Ordered", (SUM(od.quantityOrdered)*od.priceEach) AS "Total Sale"
+FROM products p 
+JOIN orderdetails od
+ON p.productCode = od.productCode
+GROUP BY p.productCode
+ORDER BY "ToTal Sale" DESC;*/
+/*SELECT productcode, quantityOrdered FROM orderdetails
+GROUP BY productCode
+HAVING productCode = "S10_1678";*/
+/*SELECT productcode, sum(quantityOrdered) FROM orderdetails
+WHERE  productcode = "S10_1678";*/
+

sqlJoinsPart3.sql

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+/*Part 3
+Write a query which lists order status and the # of orders with that status.
+Column headers should be Order Status and # Orders.
+Sort alphabetically by status.*/
+SELECT STATUS AS "Order Status", COUNT(ordernumber) AS "# of orders"
+FROM orders
+GROUP BY STATUS
+ORDER BY STATUS ASC;

sqlJoinsPart4.sql

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+/*Part 4
+Write a query to list, for each product line, the total # of products sold from that product line.
+The first column should be Product Line and the second should be # Sold.
+Order by the second column descending.*/
+SELECT productline AS "Product Line", COUNT(productcode) AS "# Sold"
+FROM products
+GROUP BY productline
+ORDER BY COUNT(productcode) DESC;

sqlJoinsPart6.sql

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+/*Part 6
+Your product team is requesting data to help them create a bar-chart of monthly sales since the company’s inception.
+Write a query to output the month (January, February, etc.), 4-digit year, and total sales for that month.
+The first column should be labeled Month, the second Year, and the third should be Payments Received.
+Values in the third column should be formatted as numbers with two decimals – for example: 694,292.68.*/
+SELECT EXTRACT(MONTH FROM paymentDate) AS Month, EXTRACT(YEAR FROM paymentDate) Year, FORMAT(SUM(amount), 2) AS 'Payments Received'
+FROM payments
+GROUP BY Month, YEAR