Книга: Fedora™ Unleashed, 2008 edition
The MySQL Command-Line Client
The MySQL Command-Line Client
The MySQL command-line client is mysql, and it has the following syntax:
mysql [options] [database]
Some of the available options for mysql are discussed in Table 18.1. database is optional, and if given, it should be the name of the database to which you want to connect.
TABLE 18.1 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). |
-u username |
Connects to the database as the user username. |
-p |
Prompts for a password. This option is required if the user as whom you are connecting needs a password to access the database. Note that this is a lowercase p. |
-P n |
Specifies n as the number of the port to which the client should connect. Note that this is an uppercase P. |
-? |
Displays a help message. |
More options are available than are listed in Table 18.1, but these are the most common options. See the man page for mysql for more information on the available options.
CAUTION
Although mysql enables you to specify the password on the command line after the -p option, and thus enables 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.
exit (q) Exit mysql. Same as quit.
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.
use (u) Use another database. Takes database name as argument.
You can then access a database by using the use command and the name of a database that has been created (such as animals) and to which you are authorized to connect, like this:
mysql> use animals
Database changed
mysql>
Оглавление книги
- QLineEdit
- 4.4.4 The Dispatcher
- SERVER CLIENT MAPPING
- About the author
- Chapter 7. The state machine
- Appendix A. Detailed explanations of special commands
- Appendix E. Other resources and links
- Example NAT machine in theory
- The final stage of our NAT machine
- Compiling the user-land applications
- The conntrack entries
- Untracked connections and the raw table