MYSQL LOAD DATA INFILE

Question

我在mysql中使用LOAD DATA INFILE。在我的输入文件中，我有“x”字符，但我必须将其保存为数据库为NULL。我该怎么办？

Answer 1

load data infile... 
into table ...
fields terminated by...
lines terminated by ...
(
 my_field...
)
set 
my_field = if(my_field = 'x', null, my_field);

Answer 2

load data infile... 
into table ...
fields terminated by...
lines terminated by ...
(
 @var...
)
set 
my_field = if(@var = 'x', null, @var);

感谢pekka