从文档中导入到数据库
load data local infile '/tmp/test.txt'into table db.new
fields terminated by ':' //列的分割符
lines terminated by '\n'; //行的分割符
load data local infile '/tmp/test.txt'
into table db.user //表列类似/etc/passwd，自己动手建吧！
fields terminated by ':'
lines terminated by '\n'
(username, password, uid, gid, common, home_dir, shell) ;
notice: --local
从数据库导出到文档
mysql> select username,password,uid from db.new into outfile '/tmp/tao.txt'fields terminated by '#'
lines terminated by '\n';
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
mysql之load data
Name: 'LOAD DATA'
Description:
Syntax:
LOAD DATA [LOW_PRIORITY | CONCURRENT] [LOCAL] INFILE 'file_name'
[REPLACE | IGNORE]
INTO TABLE tbl_name
[CHARACTER SET charset_name]
[{FIELDS | COLUMNS}
[TERMINATED BY 'string']
[[OPTIONALLY] ENCLOSED BY 'char']
[ESCAPED BY 'char']
]
[LINES
[STARTING BY 'string']
[TERMINATED BY 'string']
]
[IGNORE number {LINES | ROWS}]
[(col_name_or_user_var,...)]
[SET col_name = expr,...]
The LOAD DATA INFILE statement reads rows from a text file into a table
at a very high speed. The file name must be given as a literal string.
LOAD DATA INFILE is the complement of SELECT ... INTO OUTFILE. (See
http://dev.mysql.com/doc/refman/5.5/en/select-into.html.) To write data
from a table to a file, use SELECT ... INTO OUTFILE. To read the file
back into a table, use LOAD DATA INFILE. The syntax of the FIELDS and
LINES clauses is the same for both statements. Both clauses are
optional, but FIELDS must precede LINES if both are specified.
For more information about the efficiency of INSERT versus LOAD DATA
INFILE and speeding up LOAD DATA INFILE, see
http://dev.mysql.com/doc/refman/5.5/en/insert-speed.html.
The character set indicated by the character_set_database system
variable is used to interpret the information in the file. SET NAMES
and the setting of character_set_client do not affect interpretation of
input. If the contents of the input file use a character set that
differs from the default, it is usually preferable to specify the
character set of the file by using the CHARACTER SET clause. A
character set of binary specifies "no conversion."
LOAD DATA INFILE interprets all fields in the file as having the same
character set, regardless of the data types of the columns into which
field values are loaded. For proper interpretation of file contents,
you must ensure that it was written with the correct character set. For
example, if you write a data file with mysqldump -T or by issuing a
SELECT ... INTO OUTFILE statement in mysql, be sure to use a
--default-character-set option with mysqldump or mysql so that output
is written in the character set to be used when the file is loaded with
LOAD DATA INFILE.
*Note*: It is not possible to load data files that use the ucs2, utf16,
or utf32 character set.
The character_set_filesystem system variable controls the
interpretation of the file name.
You can also load data files by using the mysqlimport utility; it
operates by sending a LOAD DATA INFILE statement to the server. The
--local option causes mysqlimport to read data files from the client
host. You can specify the --compress option to get better performance
over slow networks if the client and server support the compressed
protocol. See http://dev.mysql.com/doc/refman/5.5/en/mysqlimport.html.
If you use LOW_PRIORITY, execution of the LOAD DATA statement is
delayed until no other clients are reading from the table. This affects
only storage engines that use only table-level locking (such as MyISAM,
MEMORY, and MERGE).
If you specify CONCURRENT with a MyISAM table that satisfies the
condition for concurrent inserts (that is, it contains no free blocks
in the middle), other threads can retrieve data from the table while
LOAD DATA is executing. Using this option affects the performance of
LOAD DATA a bit, even if no other thread is using the table at the same
time.
Prior to MySQL 5.5.1, CONCURRENT was not replicated when using
statement-based replication (see Bug #34628). However, it is replicated
when using row-based replication, regardless of the version. See
http://dev.mysql.com/doc/refman/5.5/en/replication-features-load-data.h
tml, for more information.
The LOCAL keyword, if specified, is interpreted with respect to the
client end of the connection:
o If LOCAL is specified, the file is read by the client program on the
client host and sent to the server. The file can be given as a full
path name to specify its exact location. If given as a relative path
name, the name is interpreted relative to the directory in which the
client program was started.
When using LOCAL with LOAD DATA, a copy of the file is created in the
server's temporary directory. This is not the directory determined by
the value of tmpdir or slave_load_tmpdir, but rather the operating
system's temporary directory, and is not configurable in the MySQL
Server. (Typically the system temporary directory is /tmp on Linux
systems and C:\WINDOWS\TEMP on Windows.) Lack of sufficient space for
the copy in this directory can cause the LOAD DATA LOCAL statement to
fail.
o If LOCAL is not specified, the file must be located on the server
host and is read directly by the server. The server uses the
following rules to locate the file:
o If the file name is an absolute path name, the server uses it as
given.
o If the file name is a relative path name with one or more leading
components, the server searches for the file relative to the
server's data directory.
o If a file name with no leading components is given, the server
looks for the file in the database directory of the default
database.
Note that, in the non-LOCAL case, these rules mean that a file named as
./myfile.txt is read from the server's data directory, whereas the file
named as myfile.txt is read from the database directory of the default
database. For example, if db1 is the default database, the following
LOAD DATA statement reads the file data.txt from the database directory
for db1, even though the statement explicitly loads the file into a
table in the db2 database:
LOAD DATA INFILE 'data.txt' INTO TABLE db2.my_table;
Windows path names are specified using forward slashes rather than
backslashes. If you do use backslashes, you must double them.
For security reasons, when reading text files located on the server,
the files must either reside in the database directory or be readable
by all. Also, to use LOAD DATA INFILE on server files, you must have
the FILE privilege. See
http://dev.mysql.com/doc/refman/5.5/en/privileges-provided.html. For
non-LOCAL load operations, if the secure_file_priv system variable is
set to a nonempty directory name, the file to be loaded must be located
in that directory.
Appendix
http://dev.mysql.com/doc/refman/5.5/en/load-data.html
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1. 两个数据库之间相互导入，需要字符集一样!如果是英文的字符集，则无需关注字符集! 字符集相关，分享一个Oracle大师的研究！太厉害了！
2. (windows \n\r , linux \n ========>shell>yum install -y dos2unix)
shell>dos2unix test.txt --->转换为 unix 格式
shell>unix2dos test.txt --->转换为 windows 格式
3. mysql>create table new as select username,password,uid,gid,common,home_dir,shell from user where 1=0;
\\====>复制表结构！
书写是为了更好的思考！这句话是Dmee博主那儿看到的，Thanks!高手一枚^.^！
