sql如下：

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load data infile '/tmp/test.csv' 
into table test_info  
fields terminated by ','  optionally enclosed by '"' escaped by '"' 
lines terminated by '\r\n';

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(1)字段之间以逗号分隔，数据行之间以\r\n分隔；

(2)字符串以半角双引号包围，字符串本身的双引号用两个双引号表示。