Please note, this is a STATIC archive of website www.w3resource.com from 19 Jul 2022, cach3.com does not collect or store any user information, there is no "phishing" involved.
w3resource

SQL Subquery Exercises: Counts the customers with grades above New York's average

SQL SUBQUERY : Exercise-8 with Solution

8. From the following tables write a SQL query to count the number of customers with grades above the average in New York City. Return grade and count.

Sample table: Customer


 

Sample Solution: 

SELECT grade, COUNT (*)
FROM customer
GROUP BY grade
HAVING grade >
    (SELECT AVG(grade)
     FROM customer
     WHERE city = 'New York');

Output of the Query:

grade	count
200		3
300		2

Explanation:

SQL Subqueries: Counts the customers with grades above New York's average.

Practice Online


Inventory database model

Query Visualization:

Duration:

Query visualization of Counts the customers with grades above New York's average - Duration

Rows:

Query visualization of Counts the customers with grades above New York's average - Rows

Cost:

Query visualization of Counts the customers with grades above New York's average - Cost

Contribute your code and comments through Disqus.

Previous: Write a query to display all the customers whose id is 2001 bellow the salesman ID of Mc Lyon.
Next: From the following tables, write a SQL query to find those salespeople who earned the maximum commission. Return ord_no, purch_amt, ord_date, and salesman_id.

What is the difficulty level of this exercise?

Test your Programming skills with w3resource's quiz.



SQL: Tips of the Day

SQL Server SELECT into existing table. 

INSERT INTO dbo.TABLETWO
SELECT col1, col2
  FROM dbo.TABLEONE
 WHERE col3 LIKE @search_key

This assumes there's only two columns in dbo.TABLETWO - you need to specify the columns otherwise:

INSERT INTO dbo.TABLETWO
  (col1, col2)
SELECT col1, col2
  FROM dbo.TABLEONE
 WHERE col3 LIKE @search_key

Database: SQL Server

Ref: https://bit.ly/3y6tpA3