mysql - 在多个表上转储查询

Question

我试图从三个表之间的查询中获得一个 SQL 输出文件。下面是我的代码:

mysqldump --user=user --password=password --host=localhost dbname --where="SELECT v.ITEM_ID , v.CODE ,\
s.SENSOR , d.DESTINATIONCODE \
FROM  V_TABLE v, S_TABLE s ,D_TABLE d \
WHERE s.ITEM_ID = v.ITEM_ID \
AND s.CREATIONDATETIME <  '2014-2-16 00:00:00'\
AND v.DESTINATION_ID=d.ID" > /var/www/dumps/output_15_12_2017.sql

这给了我一个错误:

mysqldump: Couldn't execute 'SELECT /*!40001 SQL_NO_CACHE */ * FROM `COMMANDSPOOL` WHERE SELECT v.ITEM_ID , v.CODE ,s.SENSOR , d.DESTINATIONCODE FROM  V_TABLE v, S_TABLE s ,D_TABLE d  WHERE s.ITEM_ID = v.ITEM_ID AND s.CREATIONDATETIME <  '2014-2-16 00:00:00' AND v.DESTINATION_ID=d.ID': You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'SELECT v.ITEM_ID , v.CODE ,s.SENSOR , d.DESTINATIONCODE FROM  V_TABLE' at line 1 (1064         )

可能是使用\时出错

Answer 1

要使用这样的查询，您可以将其发送到 mysql 客户端(而不是 mysqldump 实用程序)，然后将该输出重定向到文件:

echo "SELECT v.ITEM_ID , v.CODE ,\
s.SENSOR , d.DESTINATIONCODE \
FROM  V_TABLE v, S_TABLE s ,D_TABLE d \
WHERE s.ITEM_ID = v.ITEM_ID \
AND s.CREATIONDATETIME <  '2014-2-16 00:00:00'\
AND v.DESTINATION_ID=d.ID\
" | mysql --user=user --password=password --host=localhost dbname > /var/www/dumps/output_15_12_2017.sql

如果您要走这条路线，那么 --batch 和 --table 选项可能会很有用。