LEAST(...)

All functions > COMPARISON > LEAST(...)

Returns the least (minimum) value from a list of arguments.

Syntax

LEAST(expr, expr, ...)

LEAST(expr, expr, ...)

Notes

• All arguments must be of the same or compatible types
• If any argument is NULL, the result is NULL
• For strings, uses lexicographic (dictionary) ordering
• For dates/timestamps, returns the earliest date/time
• For ARRAY and ROW, uses the same ordering as < / >
• Can accept any number of arguments (not just two)
• Equivalent to finding the minimum value across multiple columns
• Opposite of GREATEST function

Related Functions

• LEAST(...)

Examples

Numeric values

SELECT
    -- Numeric minimum
    f1 := LEAST(1, 5, 3),
    -- All same values
    f2 := LEAST(1, 1, 1),
    -- Negative numbers
    f3 := LEAST(-5, -1, -10),
    -- NULL input
    f4 := LEAST(NULL::BIGINT, 5, 3)
;

Other types

SELECT
    -- String minimum
    f1 := LEAST('apple', 'banana', 'cherry'),
    -- Case sensitive (A < a)
    f2 := LEAST('a', 'A'),
    -- Decimal numbers
    f3 := LEAST(1.5, 2.3, 1.1)
;

Arrays and rows

SELECT
    -- Lexicographic min of two arrays
    f1 := LEAST(ARRAY(1, 2), ARRAY(1, 0))
;