Project: Creating your own functions
Comparing MySQL's string functions to Python's, you will notice that Python supports the capitalize() and capwords() functions. These capitalize the initial letter of the string and the first letter of each word, respectively. MySQL has no built-in capability to do this. It either returns all uppercase, all lowercase, or the original format of the string value. To put the onus of capitalization on the MySQL server, we need to define our own functions.
Hello()
To create a function, we necessarily have to go back to the CREATE statement. As in a Python function definition, MySQL expects us to declare the name of the function as well as any arguments it requires. Unlike Python, MySQL also wants the type of data that will be received by the function. The beginning of a basic MySQL function definition looks like this:
CREATE FUNCTION hello(s CHAR(20))
MySQL then expects to know what kind of data to return. Again, we use the MySQL data type definitions for this...
