sql_queries_questions.txt

Q1) Select all orders for the 3rd quarter of 2004. 
   (Display the columns for OrderNumber, OrderDate, CustomerName, and Status.)  

Q2) Select the orders from France, Swenden, or UK in 2005. 
   (Display the columns for OrderNumber, OrderDate, CustomerName, Country, Sales.) 

Q3) Select the average MSRP for all products with the name "avg_price".

Q4) Select the average MSRP for each ProductLine with the descending order by the average price.

Q5) Select the productlines the average prices of which are greater than 100.

Q6) Select all the products with the number of orders for each product.

Q7) Select customers and their phone numbers who are located in Spain or USA.

Q8) Select the top customers for each country with their total purchasing values.

Q9) For each product, compare its MSRP and its actual price. 
    (Use the weighted average price for the actual price. The weight for each order is the ratio of the quantity compared to the total quantity of the product.)

Q10) Calculate the average sales per customer in 2004.

Q11) Create a user-defined function to find the average sales per customer for the selected year and month.
     Select the average sales per customer for October in 2004 using the user-defined function. 

Q12) Select the CustomerNames and the contact names who purchased more than the average sales in 2004.

Q13) Create a Stored Procedure to call the list of customers who purchased more than the selected values in the selected year.
     Select the customers who purchased more than $100,000 in 2004 using the stored-procedure.

Q14) Select the sales for each quarter in 2004 for each country.
    (Create columns for sales for each quarter using CASE statement).

Q15) Create a trigger to insert a backup record to the backup table after the original table is updated.
    (Create a backup table first and then create the trigger. To check if the trigger works well, update the MSRP = 200 for ProductID = 4)