方法二、使用MySQL的SELECT INTO OUTFILE 備份語句（推薦）
在下面的例子中，生成一個文件，各值用逗號隔開。這種格式可以被許多程序使用。

SELECT* INTO OUTFILE '/root/student_answer_block.text'FIELDS TERMINATED BY ',' OPTIONALLY ENCLOSED BY '"' LINES TERMINATED BY '\n' FROMstudent_answer_block WHEREexamination_id IN (SELECTIDFROMexaminationsWHERESTATISTIC_TRIGGERED = 'Y'AND STATISTIC_DATE < DATE_SUB(CURDATE(), INTERVAL 1 MONTH)AND ORG_NO IS NOT NULLORDER BYSTATISTIC_DATE DESC);SELECT* INTO OUTFILE '/root/student_question.text'FIELDS TERMINATED BY ',' OPTIONALLY ENCLOSED BY '"' LINES TERMINATED BY '\n' FROMstudent_question WHEREexamination_id IN (SELECTIDFROMexaminationsWHERESTATISTIC_TRIGGERED = 'Y'AND STATISTIC_DATE < DATE_SUB(CURDATE(), INTERVAL 1 MONTH)AND ORG_NO IS NOT NULLORDER BYSTATISTIC_DATE DESC);

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方法三、使用mysqldump
很奇妙的是我發現了mysqldump其實有個很好用的參數“—w”
幫助文檔上說明：
-w, --where=name Dump only selected records. Quotes are mandatory.
Defaults to on; use --skip-lock-tables to disable

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備份一個月前的數據：
mysqldump -S /data/mysqldata/3307/mysql.sock -uroot -p --skip-lock-tables yeah100 student_answer_block --where "examination_id IN ( SELECT ID FROM examinations WHERE STATISTIC_TRIGGERED = 'Y' AND STATISTIC_DATE < DATE_SUB(CURDATE(), INTERVAL 1 MONTH) AND ORG_NO IS NOT NULL ORDER BY STATISTIC_DATE DESC )" > /tmp/student_answer_block.sql mysqldump -S /data/mysqldata/3307/mysql.sock -uroot -p --skip-lock-tables yeah100 student_question --where "examination_id IN ( SELECT ID FROM examinations WHERE STATISTIC_TRIGGERED = 'Y' AND STATISTIC_DATE < DATE_SUB(CURDATE(), INTERVAL 1 MONTH) AND ORG_NO IS NOT NULL ORDER BY STATISTIC_DATE DESC )" > /tmp/student_question.sql

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還原數據庫方法：

mysql -S /data/mysqldata/3306/mysql.sock -uroot -p yeah100bakup < ./student_question.sql

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轉載于:https://www.cnblogs.com/ivan-yang/p/8399167.html

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