第 1 行错误：未知命令 '\ '
当我使用命令行运行 SQL 脚本从 MySQL 数据库导出数据时，出现上述错误。 SQL 查询在 phpMyAdmin 中运行时工作正常，但从命令行运行时会引发错误。
这是我使用的命令行：
cat my_export | mysql -uxyzuser -pabcpassword mydb > export072911.txt
my_export 中的代码如下：
SELECT CONCAT( custfirstname, ' ', custlastname ) AS fullname, custcompany, \
SPACE( 10 ) AS custtitle, custaddressone, custaddresstwo, custcity, custstate, \
custzip, SPACE( 10 ) AS dummy, custphone, SPACE( 10 ) AS custfax, custemail, \
event_id, SPACE( 10 ) AS ticket1, SPACE( 10 ) AS ticket2, \
SPACE( 10 ) AS ticket3, SPACE( 10 ) AS ticket4, orderdate, b.quantity, \
FROM order_master a \
LEFT JOIN order_detail b ON b.order_master_id = a.id \
LEFT JOIN customer c ON c.email = a.custemail \
WHERE a.orderdate > '2010-12-01'\
AND a.event_id = '30' \
AND a.orderstatus = 'O' \
AND b.litype = 'ITEM' \
AND b.reftag = 'PKG' \
ORDER BY a.orderdate DESC;
When I run the SQL script to export data out of MySQL database, using command line, I get the above error.
The SQL query works fine when run in phpMyAdmin, but just when run from command line throws an error.
Here is the command line I am using:
cat my_export | mysql -uxyzuser -pabcpassword mydb > export072911.txt
The code in my_export is as follows:
SELECT CONCAT( custfirstname, ' ', custlastname ) AS fullname, custcompany, \
SPACE( 10 ) AS custtitle, custaddressone, custaddresstwo, custcity, custstate, \
custzip, SPACE( 10 ) AS dummy, custphone, SPACE( 10 ) AS custfax, custemail, \
event_id, SPACE( 10 ) AS ticket1, SPACE( 10 ) AS ticket2, \
SPACE( 10 ) AS ticket3, SPACE( 10 ) AS ticket4, orderdate, b.quantity, \
FROM order_master a \
LEFT JOIN order_detail b ON b.order_master_id = a.id \
LEFT JOIN customer c ON c.email = a.custemail \
WHERE a.orderdate > '2010-12-01'\
AND a.event_id = '30' \
AND a.orderstatus = 'O' \
AND b.litype = 'ITEM' \
AND b.reftag = 'PKG' \
ORDER BY a.orderdate DESC;
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您可以安全地删除所有反斜杠并使用输入重定向而不是管道。如果您将 SQL 作为 shell 变量使用，但不需要管道或重定向，则需要反斜杠。
更新 经过我自己的快速测试，看起来只要删除反斜杠，管道就可以像输入重定向一样工作。
You can safely delete all the backslashes and use input redirection rather than piping. The backslashes are needed if you are working with the SQL as a shell variable, but not for piping or redirection.
UPDATE After a quick test of my own, it looks like the pipe works just as well as input redirection as long as the backslashes are removed.