LEAST Function in Oracle SQL – PLSQL

The LEAST function in Oracle SQL / PLSQL is used to get the least or smallest value out of the expressions provided
The Syntax for the LEAST function in Oracle SQL / PLSQL is:

SELECT LEAST(expression1, expression2, expression3. . . ., expressionN)
FROM table_name;

Expression1, expression2, expression3 … expressionN are expressions evaluated by the least function.

  • If the data types of the expressions are different then all the expressions are converted to expression1 data type.
  • In character based comparison one character is considered lower or smaller than another if it has a lower character set.
  • If an expression is NULL in the LEAST function then NULL will be returned as least value.

Example 1:
[sourcecode language=”sql”]
SELECT LEAST(3,6,12,3)
FROM DUAL;[/sourcecode]

Will return “3”

Example 2:
[sourcecode language=”sql”]
SELECT LEAST(‘3′,’6′,’12’,’3′)
FROM DUAL;[/sourcecode]

Will return “12”

Example 3:
[sourcecode language=”sql”]
SELECT LEAST(‘apples’, ‘grapes’, ‘bananas’)
FROM DUAL;[/sourcecode]

Will return “apples”

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