SELECT * FROM mdl_user,mdl_user_coursecreators WHERE mdl_user.id=mdl_user_coursecreators.userid

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./bin/mysqladmin -u root -p shutdown

This lets the mysqladmin utility know that you want to shut down MySQL running as user root (-u root), and that you will enter a password (-p).

Tip: mysqladmin is a utility that lets you perform various administrative functions from a command line. It can also be used to retrieve version, process, and status information from the server. For more information about mysqladmin, see mysqladmin, Administering a MySQL Server.
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To start up your MySQL server again, make sure you are in your mysql directory, and then type

./bin/safe_mysqld &



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