SQL Exercises: Highest purchase amount of customers on a given date
SQL Aggregate Functions: Exercise-12 with Solution
From the following table, write a SQL query to find the highest order (purchase) amount by each customer on a particular order date. Filter the result by highest order (purchase) amount above 2000.00. Return customer id, order date and maximum purchase amount.
Sample table: orders
SELECT customer_id,ord_date,MAX(purch_amt) FROM orders GROUP BY customer_id,ord_date HAVING MAX(purch_amt)>2000.00;
Output of the Query:
customer_id ord_date max 3007 2012-07-27 2400.60 3002 2012-09-10 5760.00 3009 2012-10-10 2480.40 3002 2012-04-25 3045.60
The said SQL query retrieves the customer id, order date, and the maximum purchase amount for each combination of customer id and order date in the 'orders' table.
The result will be grouped by customer id and order date, and only those groups with a maximum purchase amount greater than 2000.00 will be returned. The "HAVING" clause is used to specify the condition for the groups to be returned.
Relational Algebra Expression:
Relational Algebra Tree:
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Previous SQL Exercise: Highest purchase amount on a date for each salesman.
Next SQL Exercise: Higher purchase amount of customers within a range.
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SQL: Tips of the Day
What is the best way to paginate results in SQL Server?
SELECT * FROM ( SELECT ROW_NUMBER() OVER ( ORDER BY OrderDate ) AS RowNum, * FROM Orders WHERE OrderDate >= '1980-01-01' ) AS RowConstrainedResult WHERE RowNum >= 1 AND RowNum < 20 ORDER BY RowNum
Database: SQL Server
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