FLOOR
Purpose
Returns the largest integer equal to or less than the input argument.
Syntax
where:
|
Syntax element… |
Specifies… |
|
TD_SYSFNLIB |
the name of the database where the function is located. |
|
arg |
a numeric expression. |
ANSI Compliance
This is a Teradata extension to the ANSI SQL:2011 standard.
Invocation
FLOOR is an embedded services system function. For information on activating and invoking embedded services functions, see “Embedded Services System Functions” on page 24.
Argument Types and Rules
Expressions passed to this function must have one of the following data types:
BYTEINT, SMALLINT, INTEGER, BIGINT, FLOAT/REAL/DOUBLE PRECISION, DECIMAL/NUMERIC, or NUMBER
Return Value
FLOOR is a scalar function that returns the following values:
|
IF arg is... |
THEN FLOOR returns... |
|
a non-exact number |
the next largest integer that is equal to or less than arg. |
|
an exact number |
the input argument arg. |
|
NULL |
NULL. |
Result Type and Attributes
The result type is the same data type as that of the numeric input argument.
If the input argument is defined as a DECIMAL/NUMERIC with a precision less than 38, the return DECIMAL/NUMERIC value will have its precision increased by 1. For example, if DECIMAL(6,4) were passed in, it would be increased and returned as a DECIMAL(7,4). If the precision is 38, the scale will be reduced by 1 unless the scale is 0. For example, a DECIMAL(38,38) results in a return data type of DECIMAL(38,37).
The default title for FLOOR is FLOOR(arg).
For information on default data type formats, see SQL Data Types and Literals.
Example
The following query returns the FLOAT value 13E0, since 13 is the largest integer that is less than the FLOAT value 13.6E0.
SELECT FLOOR (136E-1);
Example
The following query returns a DECIMAL value of -7.0 since -7 is the largest integer that is less than the DECIMAL literal -6.5.
SELECT FLOOR(-6.5);
Example
The following query returns a value of -7.0 with a data type of DECIMAL(3,1), since -7 is the largest integer less than DECIMAL -6.5. Note that the precision of the return value is increased by 1.
SELECT FLOOR (CAST(-6.5 AS DECIMAL(2,1)));