Exporting and importing MySQL database structures and Data

The db2 tutorial is: export and import the MySQL database structure and data. MySQL mysqldump is used for export. The basic usage is as follows:

Shell> mysqldump [OPTIONS] database [tables]

If you do not specify any tables, the entire database will be exported.

Run mysqldump -- help to obtain the option table supported by your mysqldump version.

Note: If you run mysqldump without the -- quick or -- opt option, mysqldump loads the entire result set to the memory before the export result. If you are exporting a large database, this may be a problem.

Mysqldump supports the following options:

-- Add-locks
Add lock tables and unlock table before each TABLE is exported. (To make it faster to insert data to MySQL ).
-- Add-drop-table
Add a drop table before each create statement.
-- Allow-keywords
Names of columns allowed to be created as keywords. This is done by the table name prefix on each column name.
-C, -- complete-insert
Use the complete insert Statement (with the column name ).
-C, -- compress
If both the client and server support compression, all information is compressed between the two.
-- Delayed
Use the insert delayed command to INSERT rows.
-E, -- extended-insert
Use the new multiline INSERT syntax. (A more compact and faster insert statement is provided)
-#, -- Debug [= option_string]
Tracking Program usage (for debugging ).
-- Help
Displays a help message and exits.
-- Fields-terminated-by =...
　
-- Fields-enclosed-by =...
　
-- Fields-optionally-enclosed-by =...
　
-- Fields-escaped-by =...
　
-- Fields-terminated-by =...
These options are used with-T options and have the same meaning as the load data infile clause.
Load data infile syntax.
-F, -- flush-logs
Wash Out the log files on the MySQL server before starting the export.
-F, -- force,
Even if we get an SQL error while exporting a table, continue.
-H, -- host = ..
Export data from the MySQL server on the named host. The default host is localhost.
-L, -- lock-tables.
Lock all tables for start export.
-T, -- no-create-info
Create table statement)
-D, -- no-data
No row information is written to the table. If you only want to export the structure of a table, this is very useful!
-- Opt
Same as -- quick -- add-drop-table -- add-locks -- extended-insert -- lock-tables.
You should be given the fastest export possible for reading a MySQL server.
-Pyour_pass, -- password [= your_pass]
The password used to connect to the server. If you do not specify "= your_pass", mysqldump requires a password from the terminal.
-P port_num, -- port = port_num
The TCP/IP Port used to connect to a host. (This is used to connect to a host other than localhost because it uses Unix sockets .)
-Q, -- quick
Directly export the data to stdout without buffering the query; Use mysql_use_result () to do it.
-S/path/to/socket, -- socket =/path/to/socket
The socket file used when connecting to localhost (which is the default host.
-T, -- tab = path-to-some-directory
For each given table, CREATE a table_name. SQL file that contains the SQL CREATE command and a table_name.txt file that contains data. Note: This only works when mysqldump runs on the same machine where the mysqld daemon is running .. The format of the txt file is determined by the options -- fields-xxx and -- lines -- xxx.
-U user_name, -- user = user_name
The username used by MySQL to connect to the server. The default value is your Unix login name.
-O var = option, -- set-variable var = option to set the value of a variable. Possible variables are listed below.
-V, -- verbose
Lengthy mode. Print out more information about the program.
-V, -- version
Print the version information and exit.
-W, -- where = where-condition
Only selected records are exported. Note that the quotation marks are mandatory!
"-- Where = user = jimf" "-wuserid> 1" "-wuserid <1"

The most common use of mysqldump may make a backup of the entire database:

Mysqldump -- opt database> backup-file. SQL

However, it is also useful for enriching another MySQL database with information from one database:

Mysqldump -- opt database | mysql -- host = remote-host-C database

Mysqldump exports complete SQL statements, so it is easy to import data into mysql client programs:

Shell> mysqladmin create target_db_name
Shell> mysql target_db_name <backup-file. SQL

(Reposted from the CCU newsgroup and modified by Hunte)
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