select ... into outfile语句是一种逻辑备份的方法，更准确地说是导出一张表中的数据。
Syntax:
SELECT
[ALL | DISTINCT | DISTINCTROW ]
[HIGH_PRIORITY]
[STRAIGHT_JOIN]
[SQL_SMALL_RESULT] [SQL_BIG_RESULT] [SQL_BUFFER_RESULT]
[SQL_CACHE | SQL_NO_CACHE] [SQL_CALC_FOUND_ROWS]
select_expr [, select_expr ...]
[FROM table_references
[PARTITION partition_list]
[WHERE where_condition]
[GROUP BY {col_name | expr | position}
[ASC | DESC], ... [WITH ROLLUP]]
[HAVING where_condition]
[ORDER BY {col_name | expr | position}
[ASC | DESC], ...]
[LIMIT {[offset,] row_count | row_count OFFSET offset}]
[PROCEDURE procedure_name(argument_list)]
[INTO OUTFILE 'file_name'
[CHARACTER SET charset_name]
export_options
| INTO DUMPFILE 'file_name'
| INTO var_name [, var_name]]
[FOR UPDATE | LOCK IN SHARE MODE]]
说明：
file_name表示导出的文件，但文件所在的路径权限必须是mysql:mysql的，否则mysql会报没有权限导出。
若存在该文件，会报错。
root@127.0.0.1:3306 [andyxi3306]>select id,cc into outfile '/tmp/andyxi3306/1.txt' from t1; 或使用select * into outfile '/tmp/andyxi3306/1.txt' from t1
Query OK, 20000 rows affected (0.05 sec)
root@127.0.0.1:3306 [andyxi3306]>system ls -la /tmp/andyxi3306
total 752 drwxr-xr-x 2 mysql mysql 19 Jul 8 09:34 . drwxrwxrwt. 8
root root 189 Jul 8 09:11 .. -rw-rw-rw- 1
mysql mysql 768894 Jul 8 09:34 1.txt
[root@zstedu andyxi3306]# less 1.txt
1 c4ca4238a0b923820dcc509a6f75849b
2 c81e728d9d4c2f636f067f89cc14862c
3 eccbc87e4b5ce2fe28308fd9f2a7baf3
4 a87ff679a2f3e71d9181a67b7542122c
5 e4da3b7fbbce2345d7772b0674a318d5
6 1679091c5a880faf6fb5e6087eb1b2dc
7 8f14e45fceea167a5a36dedd4bea2543
8 c9f0f895fb98ab9159f51fd0297e236d
9 45c48cce2e2d7fbdea1afc51c7c6ad26
10 d3d9446802a44259755d38e6d163e820
11 6512bd43d9caa6e02c990b0a82652dca
12 c20ad4d76fe97759aa27a0c99bff6710
13 c51ce410c124a10e0db5e4b97fc2af39
14 aab3238922bcc25a6f606eb525ffdc56
扩展：
fields [terminated by 'string']表示每个列的分隔符，[[optionally]enclosed by 'char']表示对于字符串的包含符，[enclosed by 'char']表示转义符，[starting by 'string']表示每行的开始符号，germinated by 'string'表示每行的结束符号。
如：
root@127.0.0.1:3306 [andyxi3306]>select id,cc into outfile '/tmp/andyxi3306/1.txt' fields terminated by ',' from t1;
Query OK, 20000 rows affected (0.06 sec)
[root@zstedu andyxi3306]# rm -rf 1.txt
[root@zstedu andyxi3306]# less 1.txt
1,c4ca4238a0b923820dcc509a6f75849b
2,c81e728d9d4c2f636f067f89cc14862c
3,eccbc87e4b5ce2fe28308fd9f2a7baf3