floor function

Applies to: Databricks SQL Databricks Runtime 10.4 LTS and above

Returns the largest number not bigger than expr rounded down to targetScale digits relative to the decimal point.

Syntax

floor(expr [, targetScale])

Arguments

• expr: An expression that evaluates to a numeric.
• targetScale: An optional INTEGER literal greater than -38 specifying by how many digits after the decimal points to round down.

Returns

If no targetScale is given:

• If expr is DECIMAL(p, s), returns DECIMAL(p - s + 1, 0).
• For all other cases, returns a BIGINT.

If targetScale is specified and expr is a:

• TINYINT

  Returns a DECIMAL(p, 0) with p = max(3, -targetScale + 1).

• SMALLINT

  Returns a DECIMAL(p, 0) with p = max(5, -targetScale + 1).

• INTEGER

  Returns a DECIMAL(p, 0) with p = max(10, -targetScale + 1)).

• BIGINT

  Returns a DECIMAL(p, 0) with p = max(20, -targetScale + 1)).

• FLOAT

  Returns a DECIMAL(p, s) with p = max(14, -targetScale + 1)) and s = min(7, max(0, targetScale))

• DOUBLE

  Returns a DECIMAL(p, s) with p = max(30, -targetScale + 1)) and s = min(15, max(0, targetScale))

• DECIMAL(p_in, s_in)

  Returns a DECIMAL(p, s) with p = max(p_in - s_in + 1, -targetScale + 1)) and s = min(s_in, max(0, targetScale))

If targetScale is negative the rounding occurs to -targetScale digits to the left of the decimal point.

The default targetScale is 0, which rounds down to the next smaller integral number.

Examples

> SELECT floor(-0.1);
 -1

> SELECT floor(5);
 5

> SELECT floor(3345.1, -2);
 3300

> SELECT floor(-12.345, 1);
 -12.4

Related functions

• ceiling function
• ceil function
• bround function
• round function