2）使用默認選項導出數據庫test下的所有表；
mysql> system mysqldump -uroot -p -T /usr/local/mysql/mysql-files/ test;
Enter password:
mysql> system ls -l /usr/local/mysql/mysql-files/
total 16
-rw-r--r--. 1 root root 1437 Mar 13 22:11 t_emp.sql
-rw-rw-rw-. 1 mysql mysql 111 Mar 13 22:11 t_emp.txt
-rw-r--r--. 1 root root 1435 Mar 13 22:11 t_mm.sql
-rw-rw-rw-. 1 mysql mysql 171 Mar 13 22:11 t_mm.txt
mysql>
mysql> system more /usr/local/mysql/mysql-files/t_emp.txt
1 張三 2018-03-13 18:53:44
3 李四 2018-03-13 18:53:44
5 Alen 2018-03-13 17:37:34
7 USA 2018-03-13 17:39:45
mysql> system more /usr/local/mysql/mysql-files/t_emp.sql--導出表定義腳本
3）使用帶選項的語句導出數據庫test下的t_emp表；
mysql> system mysqldump -uroot -p -T /usr/local/mysql/mysql-files/ test t_emp --fields-terminated-by=',' --fields-optionally-enclosed-by='"';
Enter password:
mysql> system ls -l /usr/local/mysql/mysql-files/
total 8
-rw-r--r--. 1 root root 1437 Mar 13 22:18 t_emp.sql
-rw-rw-rw-. 1 mysql mysql 127 Mar 13 22:18 t_emp.txt
mysql> system more /usr/local/mysql/mysql-files/t_emp.txt
1,"張三","2018-03-13 18:53:44"
3,"李四","2018-03-13 18:53:44"
5,"Alen","2018-03-13 17:37:34"
7,"USA","2018-03-13 17:39:45"
mysql>
以上，可以發現，mysqldump和select...into outfile...的選項和語法非常相似，其實，mysqldump實際調用的就是后者提供的接口，并在其上增添了新功能而已。 MySQL之導入 MySQL的導入功能和導出相對應，也有兩種導入方式，分別為：
LOAD DATA INFILE...
MySQLImport工具
1、LOAD DATA INFILE...1）語法如下：
LOAD DATA [LOCAL] INFILE 'filename' INTO TABLE tablename [option]
其中option參數可以是以下選項：
FIELDS TERMINATED BY 'string'（字段分隔符，默認為制表符‘\t’）；
FIELDS [OPTIONALLY] ENCLOSED BY 'char' （字段引用符，如果加OPTIONALLY選項則只用在char、varchar和text等字符型字段上，默認不使用引用符）；
FIELDS ESCAPED BY ‘char’ （轉義字符，默認為‘\’）；
LINES STARTING BY ‘string’ （每行前都加此字符串，默認‘’）；
LINES TERMINATED BY ‘string’ （行結束符，默認為‘\n’）；
IGNORE number LINES（忽略輸入文件中的前n行數據）；
（col_name_or_user_var，...）（按照列出的字段順序和字段數量加載數據）；
SET col_name=expr，...將列做一定的數值轉換后再加載；
2）加載導出的t_emp表數據；
mysql> load data infile '/usr/local/mysql/mysql-files/t_emp.txt' into table t_emp fields terminated by ',' optionally enclosed by '"';
Query OK, 4 rows affected (0.02 sec)
Records: 4 Deleted: 0 Skipped: 0 Warnings: 0mysql> select *from t_emp;
+----+--------+---------------------+
| id | name | cdate |
+----+--------+---------------------+
| 1 | 張三 | 2018-03-13 18:53:44 |
| 3 | 李四 | 2018-03-13 18:53:44 |
| 5 | Alen | 2018-03-13 17:37:34 |
| 7 | USA | 2018-03-13 17:39:45 |
+----+--------+---------------------+
4 rows in set (0.00 sec)mysql>
3）如果不希望加載前2行，可以用以下語句：
mysql> truncate table t_emp;
Query OK, 0 rows affected (0.06 sec)
mysql> load data infile '/usr/local/mysql/mysql-files/t_emp.txt' into table t_emp fields terminated by ',' enclosed by '"' ignore 2 lines;
Query OK, 2 rows affected (0.03 sec)
Records: 2 Deleted: 0 Skipped: 0 Warnings: 0mysql> select *from t_emp;
+----+------+---------------------+
| id | name | cdate |
+----+------+---------------------+
| 5 | Alen | 2018-03-13 17:37:34 |
| 7 | USA | 2018-03-13 17:39:45 |
+----+------+---------------------+
2 rows in set (0.00 sec)
mysql> system more /usr/local/mysql/mysql-files/t_emp.txt
1,"張三","2018-03-13 18:53:44"
3,"李四","2018-03-13 18:53:44"
5,"Alen","2018-03-13 17:37:34"
7,"USA","2018-03-13 17:39:45"
mysql>
4）使用LINES STARTING BY ‘string’選項過濾數據；
mysql> system more /usr/local/mysql/mysql-files/t_emp.txt
Alen1,"張三","2018-03-13 18:53:44"
3,"李四","2018-03-13 18:53:44"
Alen5,"Alen","2018-03-13 17:37:34"
7,"USA","2018-03-13 17:39:45"
mysql> load data infile '/usr/local/mysql/mysql-files/t_emp.txt' into table t_emp fields terminated by ',' enclosed by '"' lines starting by 'Alen';
Query OK, 2 rows affected (0.05 sec)
Records: 2 Deleted: 0 Skipped: 0 Warnings: 0mysql> select *from t_emp;
+----+--------+---------------------+
| id | name | cdate |
+----+--------+---------------------+
| 1 | 張三 | 2018-03-13 18:53:44 |
| 5 | Alen | 2018-03-13 17:37:34 |
+----+--------+---------------------+
2 rows in set (0.00 sec)mysql>
注：LINES STARTING BY ‘string’選項時，可跳過指定字符的前綴以及前綴之前的所有字符，如果某行不包含該指定字符，則該行記錄也會被跳過。5）表中的列數多于數據文件時的處理；
mysql> desc t_emp;
+-------+--------------+------+-----+-------------------+----------------+
| Field | Type | Null | Key | Default | Extra |
+-------+--------------+------+-----+-------------------+----------------+
| id | int(11) | NO | PRI | NULL | auto_increment |
| name | varchar(100) | YES | | NULL | |
| cdate | datetime | YES | | CURRENT_TIMESTAMP | |
| sex | char(1) | YES | | NULL | |
+-------+--------------+------+-----+-------------------+----------------+
4 rows in set (0.00 sec)mysql> system more /usr/local/mysql/mysql-files/t_emp.txt
1,"張三","2018-03-13 18:53:44"
3,"李四","2018-03-13 18:53:44"
5,"Alen","2018-03-13 17:37:34"
7,"USA","2018-03-13 17:39:45"
mysql> truncate table t_emp;
Query OK, 0 rows affected (0.07 sec)mysql> load data infile '/usr/local/mysql/mysql-files/t_emp.txt' into table t_emp fields terminated by ',' enclosed by '"' (id,name,cdate);
Query OK, 4 rows affected (0.06 sec)
Records: 4 Deleted: 0 Skipped: 0 Warnings: 0mysql> select *from t_emp;
+----+--------+---------------------+------+
| id | name | cdate | sex |
+----+--------+---------------------+------+
| 1 | 張三 | 2018-03-13 18:53:44 | NULL |
| 3 | 李四 | 2018-03-13 18:53:44 | NULL |
| 5 | Alen | 2018-03-13 17:37:34 | NULL |
| 7 | USA | 2018-03-13 17:39:45 | NULL |
+----+--------+---------------------+------+
4 rows in set (0.00 sec)mysql>
6）表中的列數少于數據文件時的處理；
mysql> desc t_emp;
+-------+--------------+------+-----+-------------------+----------------+
| Field | Type | Null | Key | Default | Extra |
+-------+--------------+------+-----+-------------------+----------------+
| id | int(11) | NO | PRI | NULL | auto_increment |
| name | varchar(100) | YES | | NULL | |
| cdate | datetime | YES | | CURRENT_TIMESTAMP | |
| sex | int(1) | YES | | NULL | |
+-------+--------------+------+-----+-------------------+----------------+
4 rows in set (0.00 sec)mysql> system more /usr/local/mysql/mysql-files/t_emp.txt
1,1,"張三","2018-03-13 18:53:44",25
3,1,"李四","2018-03-13 18:53:44",24
5,1,"Alen","2018-03-13 17:37:34",30
7,0,"Lucy","2018-03-13 17:39:45",20
mysql> truncate table t_emp;
Query OK, 0 rows affected (0.07 sec)mysql> load data infile '/usr/local/mysql/mysql-files/t_emp.txt' into table t_emp fields terminated by ',' enclosed by '"' (id,sex,name,cdate,@tmp);
Query OK, 4 rows affected (0.03 sec)
Records: 4 Deleted: 0 Skipped: 0 Warnings: 0mysql> select *from t_emp;
+----+--------+---------------------+------+
| id | name | cdate | sex |
+----+--------+---------------------+------+
| 1 | 張三 | 2018-03-13 18:53:44 | 1 |
| 3 | 李四 | 2018-03-13 18:53:44 | 1 |
| 5 | Alen | 2018-03-13 17:37:34 | 1 |
| 7 | Lucy | 2018-03-13 17:39:45 | 0 |
+----+--------+---------------------+------+
4 rows in set (0.00 sec)mysql>
7）表中的列數和數據文件不一樣，并且數據文件的列類型也不同時的處理；
mysql> desc t_emp;
+-------+--------------+------+-----+-------------------+----------------+
| Field | Type | Null | Key | Default | Extra |
+-------+--------------+------+-----+-------------------+----------------+
| id | int(11) | NO | PRI | NULL | auto_increment |
| name | varchar(100) | YES | | NULL | |
| cdate | datetime | YES | | CURRENT_TIMESTAMP | |
| sex | int(1) | YES | | NULL | |
+-------+--------------+------+-----+-------------------+----------------+
4 rows in set (0.00 sec)mysql> system more /usr/local/mysql/mysql-files/t_emp.txt
1,"男","張三","2018-03-13 18:53:44",25
3,"男","李四","2018-03-13 18:53:44",24
5,"男","Alen","2018-03-13 17:37:34",30
7,"女","Lucy","2018-03-13 17:39:45",20
mysql> load data infile '/usr/local/mysql/mysql-files/t_emp.txt' into table t_emp-> fields terminated by ','-> enclosed by '"' (id,@tmp_sex,name,cdate,@tmp)-> set sex=if(@tmp_sex='男',1,0);
Query OK, 4 rows affected (1.05 sec)
Records: 4 Deleted: 0 Skipped: 0 Warnings: 0mysql> select *from t_emp;
+----+--------+---------------------+------+
| id | name | cdate | sex |
+----+--------+---------------------+------+
| 1 | 張三 | 2018-03-13 18:53:44 | 1 |
| 3 | 李四 | 2018-03-13 18:53:44 | 1 |
| 5 | Alen | 2018-03-13 17:37:34 | 1 |
| 7 | Lucy | 2018-03-13 17:39:45 | 0 |
+----+--------+---------------------+------+
4 rows in set (0.00 sec)mysql>
2、MySQLImport工具1）語法如下：
mysqlimport -uroot -p [local] dbname tab.txt [option]
其中option參數可以是以下選項：
