MySQL Load Data InFile 数据导入数据库

常用如下：
Load Data InFile
'C:/Data.txt' Into Table `TableTest` Lines Terminated By
'\r\n';
这个语句，字段默认用制表符隔开，每条记录用换行符隔开，在Windows下换行符为“\r\n”

C:/Data.txt 文件内容如下面两行：

1 A

2 B

“1”和“A”之间有一个制表符

这样就导进两条记录了。

自定义语法

Load Data InFile 'C:/Data.txt' Into Table `TableTest` Fields
Terminated By ',' Enclosed By '"' Escaped By '"' Lines Terminated
By '\r\n';

Fields Terminated By ',' Enclosed By '"' Escaped By
'"'

表示每个字段用逗号分开，内容包含在双引号内

Lines Terminated By '\r\n';

表示每条数据用换行符分开

和 Load Data InFile 相反的是
Select * From `TableTest` Into OutFile
'C:/Data_OutFile.txt';

把表的数据导出

我们的示例文本文件：

"我爱你","20","相貌平常，经常耍流氓！哈哈"

"李奎","21","相貌平常，经常耍流氓！哈哈"

"王二米","20","相貌平常，经常耍流氓！哈哈"

"老三","24","很强"

"老四","34","XXXXX"

"老五","52","***%*￥*￥*￥*￥"

"小猫","45","中间省略。。。"

"小狗","12","就会叫"

"小妹","21","PP的很"

"小坏蛋","52","表里不一"

"上帝他爷","96","非常英俊"

"MM来了","10","。。。"

"歌颂党","20","社会主义好"

"人民好","20","的确是好"

"老高","10","学习很好"

"斜三","60","眼睛斜了"

"中华之子","100","威武的不行了"

"大米","63","我爱吃"

"苹果","15","好吃"

我们的示例表结构：

 CREATE TABLE t0 (

id bigint(20)
unsigned NOT NULL auto_increment,

name char(20)
NOT NULL,

age tinyint(3)
unsigned NOT NULL,

description
text NOT NULL,

PRIMARY KEY
(id),

UNIQUE KEY
idx_name (name)

) ENGINE=MyISAM
DEFAULT CHARSET=utf8 

 

mysql> load data infile
'/tmp/t0.txt' ignore into table t0 character set gbk fields
terminated by ',' enclosed by '"' lines terminated by
'\n' (name,age,description);

Query OK, 19 rows affected (0.01 sec)

Records: 19 Deleted: 0 Skipped: 0 Warnings: 0

mysql> select * from t0;

+----+----------+-----+----------------------------+

| id |
name    
| age |
description               
|

+----+----------+-----+----------------------------+

| 1 | 我爱你   | 20 | 相貌平常，经常耍流氓！哈哈
|

| 2 |
李奎    
| 21 | 相貌平常，经常耍流氓！哈哈 |

| 3 | 王二米   | 20 | 相貌平常，经常耍流氓！哈哈
|

| 4 |
老三    
| 24 |
很强                      
|

| 5 |
老四    
| 34 |
XXXXX                     
|

| 6 |
老五    
| 52 |
***%*￥*￥*￥*￥          
|

| 7 |
小猫    
| 45 |
中间省略。。。            
|

| 8 |
小狗    
| 12 |
就会叫                    
|

| 9 |
小妹    
| 21 |
PP的很                    
|

| 10 | 小坏蛋   | 52 |
表里不一                  
|

| 11 | 上帝他爷 | 96 |
非常英俊                  
|

| 12 | MM来了   | 10 |
。。。                    
|

| 13 | 歌颂党   | 20 |
社会主义好                
|

| 14 | 人民好   | 20 |
的确是好                  
|

| 15 |
老高    
| 10 |
学习很好                  
|

| 16 |
斜三    
| 60 |
眼睛斜了                  
|

| 17 | 中华之子 | 100 |
威武的不行了              
|

| 18 |
大米    
| 63 |
我爱吃                    
|

| 19 |
苹果    
| 15 |
好吃                      
|

+----+----------+-----+----------------------------+

19 rows in set (0.00 sec)

我来说明一下相关的参数

关于我的导入语句，我现在直说两个，其他的参考手册。

character set gbk;

这个字符集一定要写，要不然就会乱码或者只导入一部分数据。

ignore into table

因为name 列加了唯一索引，加这个是为了避免重复数据插入报错。

加入我们再次运行这个导入语句就会发现

Query OK, 0 rows affected (0.00 sec)

Records: 19 Deleted: 0 Skipped: 19 Warnings: 0

没有任何值导入，因为里面已经有了相同的值。

这里也可以用replace
into table

MySQL会把相同的先干掉，再插入新的值。

mysql> load data infile '/tmp/t0.txt' replace into
table t0 character set gbk fields terminated by ',' enclosed by '"'
lines terminated by '\n' (name,age,description);

Query OK, 38 rows affected (0.00 sec)

Records: 19 Deleted: 19 Skipped: 0 Warnings: 0

mysql> select * from t0;

+----+----------+-----+----------------------------+

| id |
name    
| age |
description               
|

+----+----------+-----+----------------------------+

| 20 | 我爱你   | 20 | 相貌平常，经常耍流氓！哈哈
|

| 21 |
李奎    
| 21 | 相貌平常，经常耍流氓！哈哈 |

| 22 | 王二米   | 20 | 相貌平常，经常耍流氓！哈哈
|

| 23 |
老三    
| 24 |
很强                      
|

| 24 |
老四    
| 34 |
XXXXX                     
|

| 25 |
老五