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8.13. mysqlshow — Display Database, Table, and Column Information
The mysqlshow client can be used to quickly
see which databases exist, their tables, or a table's columns
or indexes.
mysqlshow provides a command-line interface
to several SQL SHOW statements. See
Section 13.5.4, “SHOW Syntax”. The same information can be obtained
by using those statements directly. For example, you can issue
them from the mysql client program.
Invoke mysqlshow like this:
shell> mysqlshow [options] [db_name [tbl_name [col_name]]]
If no database is given, a list of database names is
shown.
If no table is given, all matching tables in the database
are shown.
If no column is given, all matching columns and column
types in the table are shown.
The output displays only the names of those databases, tables,
or columns for which you have some privileges.
If the last argument contains shell or SQL wildcard characters
(‘*’,
‘?’,
‘%’, or
‘_’), only those names that are
matched by the wildcard are shown. If a database name contains
any underscores, those should be escaped with a backslash
(some Unix shells require two) to get a list of the proper
tables or columns. ‘*’ and
‘?’ characters are converted
into SQL ‘%’ and
‘_’ wildcard characters. This
might cause some confusion when you try to display the columns
for a table with a ‘_’ in the
name, because in this case, mysqlshow shows
you only the table names that match the pattern. This is
easily fixed by adding an extra
‘%’ last on the command line as
a separate argument.
mysqlshow supports the following options:
-
--help, -?
Display a help message and exit.
-
--character-sets-dir=path
The directory where character sets are installed. See
Section 5.10.1, “The Character Set Used for Data and Sorting”.
-
--compress, -C
Compress all information sent between the client and the
server if both support compression.
-
--count
Show the number of rows per table. This can be slow for
non-MyISAM tables.
-
--debug[=debug_options],
-#
[debug_options]
Write a debugging log. The
debug_options string often is
'd:t:o,file_name'.
-
--default-character-set=charset_name
Use charset_name as the default
character set. See Section 5.10.1, “The Character Set Used for Data and Sorting”.
-
--host=host_name,
-h host_name
Connect to the MySQL server on the given host.
-
--keys, -k
Show table indexes.
-
--password[=password],
-p[password]
The password to use when connecting to the server. If you
use the short option form (-p), you
cannot have a space between the
option and the password. If you omit the
password value following the
--password or -p option
on the command line, you are prompted for one.
Specifying a password on the command line should be
considered insecure. See
Section 5.8.6, “Keeping Your Password Secure”.
-
--port=port_num,
-P port_num
The TCP/IP port number to use for the connection.
-
--protocol={TCP|SOCKET|PIPE|MEMORY}
The connection protocol to use.
-
--show-table-type, -t
Show a column indicating the table type, as in
SHOW FULL TABLES. The type is
BASE TABLE or VIEW.
-
--socket=path,
-S path
For connections to localhost, the Unix
socket file to use, or, on Windows, the name of the named
pipe to use.
-
--status, -i
Display extra information about each table.
-
--user=user_name,
-u user_name
The MySQL username to use when connecting to the server.
-
--verbose, -v
Verbose mode. Print more information about what the
program does. This option can be used multiple times to
increase the amount of information.
-
--version, -V
Display version information and exit.
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