-单次交易
此选项发送开始交易SQL语句到服务器之前转储数据.仅对事务表，例如InnoDB和BDB，因为它会转储数据库处于一致状态开始发行BEGIN的时间阻止任何应用程序.
This option sends a START TRANSACTION
SQL statement to the server before
dumping data. It is useful only with
transactional tables such as InnoDB
and BDB, because then it dumps the
consistent state of the database at
the time when BEGIN was issued without
blocking any applications.
使用此选项时，您应该请记住，只有InnoDB表以一致的状态转储.为了例如，任何MyISAM或MEMORY表使用此选项时转储可能仍然更改状态.
When using this option, you should
keep in mind that only InnoDB tables
are dumped in a consistent state. For
example, any MyISAM or MEMORY tables
dumped while using this option may
still change state.
--single-transaction dump是在进行中，以确保有效的转储文件(正确的表内容和二进制日志坐标)，没有其他连接应使用以下内容语句:ALTER TABLE，CREATE TABLE，删除表，重命名表，截断桌子.一致的阅读不是与这些陈述隔离，因此请使用它们放在要倾倒的桌子上的罐头导致由执行的SELECTmysqldump检索表内容以获得不正确的内容或失败.
While a --single-transaction dump is
in process, to ensure a valid dump
file (correct table contents and
binary log coordinates), no other
connection should use the following
statements: ALTER TABLE, CREATE TABLE,
DROP TABLE, RENAME TABLE, TRUNCATE
TABLE. A consistent read is not
isolated from those statements, so use
of them on a table to be dumped can
cause the SELECT that is performed by
mysqldump to retrieve the table
contents to obtain incorrect contents
or fail.
-single-transaction选项和--lock-tables选项是相互的排他性，因为LOCK TABLES导致任何待处理的交易隐式提交.
The --single-transaction option and
the --lock-tables option are mutually
exclusive because LOCK TABLES causes
any pending transactions to be
committed implicitly.
MySQL不支持此选项集群表；结果不能是由于NDBCLUSTER存储的事实引擎仅支持READ_COMMITTED事务隔离等级.您应该始终使用NDB备份并还原.
This option is not supported for MySQL
Cluster tables; the results cannot be
guaranteed to be consistent due to the
fact that the NDBCLUSTER storage
engine supports only the
READ_COMMITTED transaction isolation
level. You should always use NDB
backup and restore instead.
要转储大表，您应该结合-单一交易--quick选项.
To dump large tables, you should
combine the --single-transaction
option with --quick.
如果要备份/移动实时数据库，则应考虑
If you want to backup/move your live DB, you should consider MySQL replication
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