Question

我有兴趣将mysql select语句导出到samba共享上的文件中。一切正常，直到我尝试更新文件。例如，我有mysql导出到outfile peachtree.csv，当数据发生变化时，我希望它用新数据覆盖旧文件，但是，我收到错误：ERROR 1086（HY000）：File'/ srv / samba /share/peachtree.csv'已经存在。是否有一个选项或开关可以放入语句中强制或将其写入现有文件？

SELECT * FROM peachtree,
INTO OUTFILE '/srv/samba/share/peachtree.csv'
FIELDS TERMINATED BY ','
ENCLOSED BY '"'
LINES TERMINATED BY '\n';

Answer 1

你做不到。这是一项安全功能。否则，你可能会选择/ etc / password或/ etc / shells等文件。

从手册：

SELECT的SELECT ... INTO OUTFILE'file_name'形式写入选定的行到文件。该文件是在服务器主机上创建的，所以您必须具有FILE权限才能使用此语法。 file_name不能是一个现有的文件，其中包括防止文件等 / etc / passwd和数据库表被销毁。

http://dev.mysql.com/doc/refman/5.0/en/select.html

Answer 2

此解决方案使用动态SQL并写入Windows文件系统。

Select Now() Into @Now;                                              # get DateTime
Set @Now = Replace(@Now, ':', '-');                                  # format DateTime for the filesystem

# set Destination filename using formatted DateTime
Set @FilNam = Concat("'", 'd:/Folder/qrySelectToFile ', @Now, '.TXT', "'");
#Select @FilNam;                                                     # debug

# build query to execute, one clause at a time, for encoding purposes
Set @Sel     =  'Select * From vewViewName Into OutFile '    ; # Select From Into
Set @FldsTrm = ' Fields Terminated By ","'                         ; # Fields Terminated
Set @FldsEnc = Concat(" Enclosed By '", Char(34 Using utf8), "'")  ; #        Enclosed. 'Using' clause is to avoid a blob of 34 spaces.
Set @LinsTrm = " Lines Terminated By '\\r\\n'"                     ; # Lines  Terminated
Set @Qry = Concat(@Sel, @FilNam, @FldsTrm, @FldsEnc, @LinsTrm, ';'); # all together now

Prepare            Stmt From @Qry;                                   # Prepare
Execute            Stmt          ;                                   # Execute
Deallocate Prepare Stmt          ;                                   # Done

MySQL INTO OUTFILE override existing file?上的其他答案

MySQL导出到outfile并覆盖

2 个答案: