Table 211 Command Line Options to Use When Invoking mysql

Option Action

-h hostname Connects to the remote host hostname (if the database server isn't located on the local system).

Option

Action

-u username

Connects to the database as the user username.

Prompts for a password. This option is required if the user you are connecting as needs a password to access the database. Note that this is a lowercase p.

Specifies n as the number of the port that the client should connect to. Note that this is an uppercase p.

Displays a help message.

More options are available than are listed in Table 21.1, but these are the most common options. See the man page for mysqi for more information on the available options.

Although mysql allows you to specify the password on the command line after the -p option, and thus allows you to avoid having to type the password at the prompt, you should never invoke the client this way. Doing so causes your password to display in the process list, and the process list can be accessed by any user on the system. This is a major security hole, so you should never give your password on the mysql command line.

You can access the MySQL server without specifying a database to use. After you log in, you use the help command to get a list of available commands, like this:

mysql> help MySQL commands:

Note that all text commands must be first on line and end with ';' help (\h) Display this help. ? (\?) Synonym for 'help'. clear (\c) Clear command.

connect (\r) Reconnect to the server. Optional arguments are db and host. edit (\e) Edit command with $EDITOR.

ego (\G) Send command to mysql server, display result vertically.

go (\g) Send command to mysql server.

nopager (\n) Disable pager, print to stdout.

notee (\t) Don't write into outfile.

pager (\P) Set PAGER [to_pager]. Print the query results via PAGER. print (\p) Print current command. quit (\q) Quit mysql.

rehash (\#) Rebuild completion hash.

source (\.) Execute a SQL script file. Takes a file name as an argument. status (\s) Get status information from the server.

tee (\T) Set outfile [to_outfile]. Append everything into given outfile.

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