#基本语法：
load data [low_priority] [local] infile 'file_name txt' [replace | ignore]
into table tbl_name
[fields
[terminated by't']
[OPTIONALLY] enclosed by '']
[escaped by'\' ]]
[lines terminated by'n']
[ignore number lines]
[(col_name, )]terminated by分隔符：意思是以什么字符作为分隔符
enclosed by字段括起字符
escaped by转义字符
terminated by描述字段的分隔符，默认情况下是tab字符（\t）
enclosed by描述的是字段的括起字符。
escaped by描述的转义字符。默认的是反斜杠（backslash：\ ）
Mysql 导入导出csv
#用mysql导出时，如果文件目录没有权限，可以将文件导出到 mysql 库所在的服务器上的 /tmp/ 目录下（推荐<span></span>）
select * from s_reviews where stars >0 limit 10 into outfile '/tmp/reviews.csv' fields terminated by ',' optionally enclosed by '"' escaped by '"' lines terminated by '\n';
#从csv文件导入数据，导入的时候<span></span><span></span>，可以将要导入的文件先复制到 mysql 库所在的服务器上的 /tmp/ 目录下（推荐<span></span>）。
要将csv文件的字段和mysql表中的字段对应起来，以免出错，同时也可以提醒自己导入的是哪些数据
>LOAD DATA LOCAL INFILE '/tmp/reviews.csv' INTO TABLE s_reviews fields terminated by ',' optionally enclosed by '"' escaped by '"' lines terminated by '\n' (`id`, `user_id`, `user_name`, `shop_id`, `shop_name`, `arv_price`, `environment`, `taste_or_product`, `service`, `comment_type`, `comment`, `stars`, `review_time`, `fetch_time`);