Chapter 4. Character, Number, and Miscellaneous Functions
Functions are a very useful and powerful part of the SQL language. They can transform data in a way that is different from the way it is stored in a database. A function is a type of formula whose result is one of two things: either a transformation, such as a change in the name of a student to uppercase letters, or information, such as the length of a word in a column. Most functions share similar characteristics, including a name, and typically at least one input parameter, also called an argument, inside a pair of matching parentheses.
function_name(input_parameter) ...
Get Oracle SQL By Example now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
