oracle tutorial

Oracle/PLSQL: GREATEST Function

This Oracle tutorial explains how to use the Oracle/PLSQL GREATEST function with syntax and examples.

Description

The Oracle/PLSQL GREATEST function returns the greatest value in a list of expressions.

Syntax

The syntax for the GREATEST function in Oracle/PLSQL is:

GREATEST( expr1 [, expr2, ... expr_n] )

Parameters or Arguments

expr1
The first expression to be evaluated whether it is the greatest.
expr2, ... expr_n
Optional. Additional expressions that are to be evaluated.

Note:

If the datatypes of the expressions are different, all expressions will be converted to whatever datatype expr1 is.

If the comparison is based on a character comparison, one character is considered greater than another if it has a higher character set value.

Applies To

The GREATEST function can be used in the following versions of Oracle/PLSQL:

  • Oracle 12c, Oracle 11g, Oracle 10g, Oracle 9i, Oracle 8i

Example

Let's look at some Oracle GREATEST function examples and explore how to use the GREATEST function in Oracle/PLSQL.

For example:

GREATEST(2, 5, 12, 3)
Result: 12

GREATEST('2', '5', '12', '3')
Result: '5'

GREATEST('apples', 'oranges', 'bananas')
Result: 'oranges'

GREATEST('apples', 'applis', 'applas')
Result: 'applis'
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