mysql大批量数据导出为CSV百万计数据导出

SELECT * FROM yechujundkgametop20bymonth  WHERE  gamename='征途2S'
AND monthkey=201211
INTO OUTFILE 'D:/ztdk11.csv'   
FIELDS TERMINATED BY ',' OPTIONALLY ENCLOSED BY '"' ESCAPED BY '"'   
LINES TERMINATED BY '\r\n';

/* 当有NULL 的时候格式会变*/

UPDATE  yechujunybgametop20bymonth SET buyerqq='未知' 
WHERE buyerqq IS NULL