Write SQL code that could be used from these seven tables below

12. List the full name and number of different parts for each order each customer has placed.

Rename the calculated column as TOTAL_PARTS.

13. List the order date of an order containing a part description with letter D (or d) in it.

14. List the customer name of those who purchased products with a unit price of more than $150.

15. List sales representative number and the number of customers handled by each sales

representative who got paid at most as the average total commission. Rename the number of

transactions as NO_Customers

Table: PART Column Data Type gth Precision Scale Nullable PART NUMBER PART DESCRIPTION UNITS ON HAND ITEM CLASS WAREHOUSE NUMBERNUMBER UNIT PRICE VARCHAR2 VARCHAR2 NUMBER CHAR No - Yes Yes - Yes Yes 2 Yes 12 NUMBE 7