MySQL将查询结果写入到文件的2种方法

1.SELECT INTO OUTFIL:

这种方法不能覆盖或者追加到已经存在的文件，只能写入到新文件，并且建立文件的路径需要mysql进程用户有权限建立新文件。

mysql 61571 60876 15 Aug27 ? 3-10:58:08 /usr/local/mysql/bin/mysqld --basedir=/usr/local/mysql --datadir=/data/mysqldata/data --plugin-dir=/usr/local/mysql/lib/plugin --user=mysql --log-error=/data/mysqldata/data/localhost.localdomain.err --pid-file=/data/mysqldata/data/localhost.localdomain.pid --socket=/data/mysqldata/mysql.sock --port=33096

mysql([email protected]:tiger_erp)>select * from QQLH_CODE into outfile "/home/wy/mysql/QQLH_CODE_252.sql" 
-> ; 
ERROR 1 (HY000): Can‘t create/write to file ‘/home/wy/mysql/QQLH_CODE_252.sql‘ (Errcode: 13 - Permission denied) 
mysql([email protected]:tiger_erp)>select * from QQLH_CODE into outfile "/home/mysql/QQLH_CODE_252.sql";

2.巧用pager重定向stdout

mysql([email protected]:tiger_erp)>pager cat >/home/wy/mysql/QQLH_CODE.sql; 
PAGER set to ‘cat >/home/wy/mysql/QQLH_CODE.sql‘ 
mysql([email protected]:tiger_erp)>select * from QQLH_CODE; 
6250 rows in set (0.04 sec) 
mysql([email protected]:tiger_erp)>nopager;