How to use GREATEST Function In SQL

To find the maximum of multiple columns in PL/SQL, the GREATEST function is utilized. This function compares multiple expressions and returns the greatest value among them. The syntax for using the GREATEST function is as follows:

Syntax:

SELECT GREATEST(column1, column2, column3, ...)
AS max_value FROM table_name;

Explanation:

• GREATEST: It is a function that is used to find the greatest value among a list of expressions.
• AS: This is a keyword in SQL used to alias the result of a query. In this case, max_value is the alias given to the result of the GREATEST() function.
• max_value: This is the alias assigned to the result of the GREATEST() function. It represents the maximum value among the specified columns.
• FROM: It is a keyword that is used to specify the table from which data will retrieved.
• table_name: This is the name of the table from which data will retrieved.

In PL/SQL finding the maximum value of multiple columns is a common requirement for maintaining the database. This operation is important for various applications, ranging from financial analysis to data reporting. In this article, we will learn about How to find the maximum of multiple columns in PL/SQL with the help of two different methods to resolve problems by various examples and so on.