创建查询结果的输出文件时出现问题

Question

以下是我的SQL查询，当我从phpmyadmin运行它时工作正常，但当我通过PHP运行相同的查询时，查询没有工作，并给了我跟随错误。请告诉我如何从我的php文件运行此查询，以便它将在指定的文件夹中创建输出文件。谢谢，

QUERY

SELECT * FROM lahore_student INTO OUTFILE 'b://uploaded//data.csv'
FIELDS TERMINATED BY ','
ENCLOSED BY '".'"'."'
LINES TERMINATED BY '\n'

Output: It creates file to my b drive in FOLDER named as Uploaded

错误： 文件'b：uploadeddata.csv'已存在

NOTE: The uploaded folder was empty

Answer 1

看起来你试图在Windows系统上运行它，这需要对目录分隔符进行特殊处理。

尝试：

SELECT * FROM lahore_student INTO OUTFILE 'b:\\uploaded\\data.csv'
FIELDS TERMINATED BY ','
ENCLOSED BY '".'"'."'
LINES TERMINATED BY '\n'

或者：

SELECT * FROM lahore_student INTO OUTFILE 'b:/uploaded/data.csv'
FIELDS TERMINATED BY ','
ENCLOSED BY '".'"'."'
LINES TERMINATED BY '\n'

另请注意，这不会覆盖现有文件（这是您获得的错误）。因此，您需要确保首先删除具有该名称的任何文件。

请参阅MYSQL文档中此页面上的The “\” path name separator character部分： http://dev.mysql.com/doc/refman/5.0/en/limits-windows.html