What is the function of the sign function in Oracle?

In Oracle, the SIGN function is used to determine the sign of a number and return the corresponding value. Its syntax is as follows:

Return the sign of a number.

parameters

1. Number: determining the numerical value of the sign.

Return value:

1. If number is greater than 0, return 1.
2. If number equals 0, return 0.
3. If number is less than 0, return -1.

The SIGN function is commonly used for comparing and calculating numerical values, helping to determine the positivity or negativity of a number, and thus performing the appropriate logical processing.