SELECT LENGTH('Software Developer') AS LENGTH_TEST
FROM dual;

SELECT LENGTH('Software Developer     ') AS LENGTH_TEST
FROM dual;

SELECT country, LENGTH(country) AS COUNTRY_LENGTH
FROM customers;

SELECT LENGTH('') as LENGTH_EMPTY,
LENGTH(' ') as LENGTH_SPACE
FROM DUAL;

http://www.databasestar.com/oracle-length/

A few examples of the LENGTH function

Oracle LENGTH Function

sql, Oracle

SQL