How does Oracle determine the length of a string?

In Oracle, you can use the LENGTH function to determine the length of a string. The LENGTH function returns the number of characters in the specified string (excluding trailing spaces). Here is an example of using the LENGTH function:

SELECT LENGTH('Hello World') AS str_length FROM dual;

The output is:

STR_LENGTH
----------
        11

You can use the LENGTHB function if you need to include trailing space characters. The LENGTHB function returns the number of bytes in the specified string. Here is an example of using the LENGTHB function:

SELECT LENGTHB('Hello World') AS str_length FROM dual;

The output is:

STR_LENGTH
----------
        11

Please note that the behavior of the LENGTH and LENGTHB functions when calculating string length may be affected by the database character set settings.