mysql インストール

brew install mysql したら↓こんなんでた。すごい親切。（makeしたら必ず出るんかな）

Set up databases with:
    unset TMPDIR
    mysql_install_db

If this is your first install, automatically load on login with:
    cp /usr/local/Cellar/mysql/5.1.55/com.mysql.mysqld.plist ~/Library/LaunchAgents
    launchctl load -w ~/Library/LaunchAgents/com.mysql.mysqld.plist

If this is an upgrade and you already have the com.mysql.mysqld.plist loaded:
    launchctl unload -w ~/Library/LaunchAgents/com.mysql.mysqld.plist
    cp /usr/local/Cellar/mysql/5.1.55/com.mysql.mysqld.plist ~/Library/LaunchAgents
    launchctl load -w ~/Library/LaunchAgents/com.mysql.mysqld.plist

Note on upgrading:
    We overwrite any existing com.mysql.mysqld.plist in ~/Library/LaunchAgents
    if we are upgrading because previous versions of this brew created the
    plist with a version specific program argument.

Or start manually with:
    mysql.server start