How do I clear the screen in the MYSQL 3 command line client?
Unfortunately this feature is not available in the Windows version..
There is a bug report Bug #58680 Windows Clear Screen Command raised (in 2010). It is marked as open (status minor).
See StackOverflow question How do I clear the mysql screen, opened through the MySQL Command Line Client? for more discussion about this.
Bug #58680 Windows Clear Screen Command
Description: I have a customer who asked for a clear screen command line for MySQL on Windows. After researching, we found out that ! clear, system clear or Crtl+L don't work for windows.
I think it would be important to have this type of command available for Windows.
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Thank you for the problem report. Indeed, this feature is not available on Windows.