Multi sql injection function

multi function sql injection
Here Is the Cheat Sheet Of Multi Functions on SCreen :
@@port : Check Ports
@@version_compile_os : Check which Operationg system is running
@@CHARACTER_SET_FILESYSTEM : tell File system :
@@version_compile_machine : Check 32 bit/64 bit
@@hostname : Current Hostname
@@tmpdir : Tept Directory
@@datadir : Data Directory
@@version : Version of DB
@@basedir : Base Directory
user() : Current User
database() : Current Database
version() : Version
schema() : current Database
UUID() : System UUID key
current_user() : Current User
current_user : Current User
system_user() : Current Sustem user
session_user() : Session user
@@GLOBAL.have_symlink : Check if Symlink Enabled or Disabled
@@GLOBAL.have_ssl : Check if it have ssl or not