Oracle Least()函数

The LEAST function returns the smallest expression in a list of expressions. All expressions after the first are implicitly converted to the data type of the first expression before t
The LEAST function returns the smallest expression in a list of expressions. All expressions after the first are implicitly converted to the data type of the first expression before the comparison.

To retrieve the largest expression in a list of expressions, use GREATEST.

Return Value

The data type of the first expression.

Syntax

LEAST (expr [, expr]...)

Arguments

An expression.

Example 17-38 Finding the Shortest Text Expressions

The following statement returns the shortest string.

SHOW LEAST(Harry,Harriot,Harold)

Harry 

Example 17-39 Finding the Smallest Numerical Expressions

The following statement selects the number with the smallest value.

SHOW LEAST (5, 3, 18)

3

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