Oracle has a "home selector" feature to allow you to change the environment between multiple $ORACLE_HOME directories, but is is just as easy to create a bat file for each oracle version to set the appropriate environment and execute it before executing sqlplus. true/false

since it can be assumed that what aslam is making is a template by compiling all the commonly used excel formatting in several worksheets in an excel document, aslam can choose to save it using the .xltx or .xltm format instead. thus, aslam can distribute the templates he has made to his team members in an easier manner.

the today function returns a valid value without any arguments.

the today function returns the current date based on the computer's date setting and formatted as a date. today takes no parameters, but requires that you use empty parentheses