Su, Xiaomeng 76a5b1ee83 dli_sqlreference_20240227

Reviewed-by: Pruthi, Vineet <vineet.pruthi@t-systems.com>
Co-authored-by: Su, Xiaomeng <suxiaomeng1@huawei.com>
Co-committed-by: Su, Xiaomeng <suxiaomeng1@huawei.com>

2024-03-27 22:02:33 +00:00

6.2 KiB

Raw Permalink Blame History

sign

This function is used to return the positive and negative signs corresponding to a.

Syntax

sign(DOUBLE a)

Parameters

**Table 1** Parameter
Parameter	Mandatory	Type	Description
a	Yes	DOUBLE, BIGINT, DECIMAL, or STRING	The value can be a float, integer, or string.

Return Values

The return value is of the DOUBLE type.

If the value of a is a positive number, 1 is returned.
If the value of a is a negative number, -1 is returned.
If the value of a is 0, 0 is returned.
If the value of a is NULL, NULL is returned.

Example Code

The value -1 is returned.

select sign(-3);

The value 1 is returned.

select sign(3);

The value 0 is returned.

select sign(0);