SQL: Display the average price of the items for each company

SQL Basic Select Statement: Exercise-29 with Solution.

From the following table, write a SQL query to calculate average price of the items for each company. Return average price and company code.

Sample table: item_mast

Sample Solution:

SELECT AVG(pro_price), pro_com
    FROM item_mast
GROUP BY pro_com;

Output of the Query:

avg					pro_com
250.0000000000000000			14
650.0000000000000000			12
3200.0000000000000000			15
5000.0000000000000000			11
1475.0000000000000000			13
500.0000000000000000			16

Relational Algebra Expression:

Relational Algebra Tree:

Practice Online

Query Visualization:

Duration:

Rows:

Cost:

Have another way to solve this solution? Contribute your code (and comments) through Disqus.

Previous: From the following table, write a SQL query to find the items whose prices are higher than or equal to $250. Order the result by product price in descending, then product name in ascending. Return pro_name and pro_price.
Next: From the following table, write a SQL query to find the cheapest item(s). Return pro_name and, pro_price.