﻿ SQL: Find the maximum purchase amount of all the orders

# SQL Exercises: Find the maximum purchase amount of all the orders

## SQL Aggregate Functions: Exercise-6 with Solution

From the following table, write a SQL query to find the maximum purchase amount.

Sample table: orders

Sample Solution:

SELECT MAX (purch_amt)
FROM orders;

Output of the Query:

max
5760.00

Code Explanation:

The said SQL statement is used to retrieve the highest value in the "purch_amt" column from the 'orders' table. The "MAX" function is used to find the maximum value in the specified column.
The result of the query would be a single value representing the highest "purch_amt" in the 'orders' table.

Relational Algebra Expression:

Relational Algebra Tree:

Explanation:

Visual presentation:

## Query Visualization:

Duration:

Rows:

Cost:

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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

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

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