--help, -?

Display a help message and exit.

--all-databases, -A

Check all tables in all databases. This is the same as using the --databases option and naming all the databases on the command line.

--all-in-1, -1

Instead of issuing a statement for each table, execute a single statement for each database that names all the tables from that database to be processed.

--analyze, -a

Analyze the tables.

MySQL Enterprise.  For expert advice on optimizing tables, subscribe to the MySQL Enterprise Monitor. For more information, see http://www.mysql.com/products/enterprise/advisors.html.

--auto-repair

If a checked table is corrupted, automatically fix it. Any necessary repairs are done after all tables have been checked.

--character-sets-dir=path

The directory where character sets are installed. See Section 9.2, “The Character Set Used for Data and Sorting”.

--check, -c

Check the tables for errors. This is the default operation.

--check-only-changed, -C

Check only tables that have changed since the last check or that have not been closed properly.

--check-upgrade, -g

Invoke CHECK TABLE with the FOR UPGRADE option to check tables for incompatibilities with the current version of the server. This option automatically enables the --fix-db-names and --fix-table-names options. --check-upgrade was added in MySQL 5.1.7.

--compress

Compress all information sent between the client and the server if both support compression.

--databases, -B

Process all tables in the named databases. Normally, mysqlcheck treats the first name argument on the command line as a database name and following names as table names. With this option, it treats all name arguments as database names.

--debug[=debug_options], -# [debug_options]

Write a debugging log. A typical debug_options string is often 'd:t:o,file_name'.

--debug-check

Print some debugging information when the program exits. This option was added in MySQL 5.1.21.

--debug-info

Print debugging information and memory and CPU usage statistics when the program exits. This option was added in MySQL 5.1.14.

--default-character-set=charset_name

Use charset_name as the default character set. See Section 9.2, “The Character Set Used for Data and Sorting”.

--extended, -e

If you are using this option to check tables, it ensures that they are 100% consistent but takes a long time.

If you are using this option to repair tables, it runs an extended repair that may not only take a long time to execute, but may produce a lot of garbage rows also!

--fast, -F

Check only tables that have not been closed properly.

--fix-db-names

Convert database names to 5.1 format. Only database names that contain special characters are affected. This option was added in MySQL 5.1.7.

--fix-table-names

Convert table names to 5.1 format. Only table names that contain special characters are affected. This option was added in MySQL 5.1.7. As of MySQL 5.1.23, this option also applies to views.

--force, -f

Continue even if an SQL error occurs.

--host=host_name, -h host_name

Connect to the MySQL server on the given host.

--medium-check, -m

Do a check that is faster than an --extended operation. This finds only 99.99% of all errors, which should be good enough in most cases.

--optimize, -o

Optimize the tables.

--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 5.5.6, “Keeping Passwords Secure”.

--pipe, -W

On Windows, connect to the server via a named pipe. This option applies only for connections to a local server, and only if the server supports named-pipe connections.

--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 for connecting to the server. It is useful when the other connection parameters normally would cause a protocol to be used other than the one you want. For details on the allowable values, see Section 4.2.2, “Connecting to the MySQL Server”.

--quick, -q

If you are using this option to check tables, it prevents the check from scanning the rows to check for incorrect links. This is the fastest check method.

If you are using this option to repair tables, it tries to repair only the index tree. This is the fastest repair method.

--repair, -r

Perform a repair that can fix almost anything except unique keys that are not unique.

--silent, -s

Silent mode. Print only error messages.

--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.

--ssl*

Options that begin with --ssl specify whether to connect to the server via SSL and indicate where to find SSL keys and certificates. See Section 5.5.7.3, “SSL Command Options”.

--tables

Overrides the --databases or -B option. All name arguments following the option are regarded as table names.

--use-frm

For repair operations on MyISAM tables, get the table structure from the .frm file so that the table can be repaired even if the .MYI header is corrupted.

--user=user_name, -u user_name

The MySQL username to use when connecting to the server.

--verbose, -v

Verbose mode. Print information about the various stages of program operation.

--version, -V

Display version information and exit.