mysql数据库备份

E:\databases\MySQL\MySQL Server 5.1\bin>mysqldump --help
mysqldump  Ver 10.13 Distrib 5.1.30, for Win32 (ia32)
By Igor Romanenko, Monty, Jani & Sinisa
This software comes with ABSOLUTELY NO WARRANTY. This is free softwa
and you are welcome to modify and redistribute it under the GPL lice
Dumping definition and data mysql database or table
Usage: mysqldump [OPTIONS] database [tables]
OR     mysqldump [OPTIONS] --databases [OPTIONS] DB1 [DB2 DB3...]
OR     mysqldump [OPTIONS] --all-databases [OPTIONS]
Default options are read from the following files in the given order
C:\WINDOWS\my.ini C:\WINDOWS\my.cnf C:\my.ini C:\my.cnf E:\databases
 Server 5.1\my.ini E:\databases\MySQL\MySQL Server 5.1\my.cnf
The following groups are read: mysqldump client
The following options may be given as the first argument:
--print-defaults        Print the program argument list and exit
--no-defaults           Don't read default options from any options
--defaults-file=#       Only read default options from the given fil
--defaults-extra-file=# Read this file after the global files are re
  -a, --all           Deprecated. Use --create-options instead.
  -A, --all-databases Dump all the databases. This will be same as -
                      with all databases selected.
  -Y, --all-tablespaces
                      Dump all the tablespaces.
  -y, --no-tablespaces
                      Do not dump any tablespace informati