Create SQL Exercises: Display the names of the company whose products have an average price larger than or equal to Rs.350

Author: mrmightyq

w3resource/SQL Exercises: Display the names of the company whose products have an average price larger than or equal to Rs.350

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+https://www.w3resource.com/sql-exercises/sql-joins-exercise-24.php
+
+SQL JOINS: Exercise-24 with Solution
+From the following tables write a SQL query to calculate and find the average price of items of each company higher than or equal to Rs. 350. Return average value and company name.
+Sample table: company_mast
+COM_ID COM_NAME
+------ -------------
+    11 Samsung
+    12 iBall
+    13 Epsion
+    14 Zebronics
+    15 Asus
+    16 Frontech
+    
+Sample table: item_mast
+     PRO_ID PRO_NAME                       PRO_PRICE    PRO_COM
+------- ------------------------- -------------- ----------
+    101 Mother Board                    3200.00         15
+    102 Key Board                        450.00         16
+    103 ZIP drive                        250.00         14
+    104 Speaker                          550.00         16
+    105 Monitor                         5000.00         11
+    106 DVD drive                        900.00         12
+    107 CD drive                         800.00         12
+    108 Printer                         2600.00         13
+    109 Refill cartridge                 350.00         13
+    110 Mouse                            250.00         12
+    
+    
+    
+select avg(b.pro_price), a.com_name
+from company_mast as a
+join item_mast as b on a.com_id=b.pro_com
+group by a.com_name
+having avg(b.pro_price) >= 350
+order by avg(b.pro_price) desc
+;