SIGN
Purpose
Returns the sign of numeric_value.
Syntax
where:
|
Syntax element … |
Specifies … |
|
TD_SYSFNLIB |
the name of the database where the function is located. |
|
numeric_value |
a numeric argument. |
ANSI Compliance
This is a Teradata extension to the ANSI SQL:2011 standard.
Invocation
SIGN 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, DECIMAL/NUMERIC, FLOAT/REAL/DOUBLE PRECISION, or NUMBER
Result Type
The result data type is NUMBER.
For information on the default data type format for NUMBER, see SQL Data Types and Literals.
Usage Notes
For all numeric types except FLOAT/REAL/DOUBLE PRECISION, SIGN will return the following:
For FLOAT/REAL/DOUBLE PRECISION, SIGN will return the following:
If the input argument is NULL, the function returns NULL.
Example
The following query returns the result -1.
SELECT SIGN(-2);
Example
The following query returns the result 0 since the value is an integer and equal to 0.
SELECT SIGN(CAST(0 AS INTEGER));
Example
The following query returns the result 1 since the data type is FLOAT and the value is >= 0.
SELECT SIGN(CAST(0 as FLOAT));
Example
The following query returns the result 1.
SELECT SIGN(3.74);