MySQL（5.6）“选择*进入outfile ..”不创建文件答案

【问题标题】：MySQL(5.6) "select * into outfile.." not creating filesMySQL（5.6）“选择*进入outfile ..”不创建文件
【发布时间】：2015-07-20 23:32:28
【问题描述】：

当我以 root 用户身份在本地主机上使用此命令时，它可以正常运行，但我似乎找不到实际文件。

SELECT * INTO OUTFILE 'C:\...\tableName.txt' 
FIELDS TERMINATED BY ',' OPTIONALLY ENCLOSED BY '"'
LINES TERMINATED BY '\r\n'
FROM tableName;

当我尝试再次运行查询时，它说文件已经创建，即使它显然不是。

编辑：修复了我的查询语法

【问题讨论】：

MySQL 服务器是否在具有该位置权限的用户帐户下运行？
@Uueerdo 是的，我可以访问该位置，问题是我没有查看正确的数据目录

标签： mysql csv export file-location

【解决方案1】：

* 后面有一个不必要的FROM。您的查询应该看起来更像这样：

SELECT * INTO OUTFILE 'C:\...\tableName.txt'
FIELDS TERMINATED BY ',' OPTIONALLY ENCLOSED BY '\r\n'
FROM tableName;

注意：确保mysql有写'C:\...\tableName.txt'的权限

至于文件已经创建错误：

该文件可能是在另一个 mysql 确实具有写入权限的目录中创建的，例如数据目录。这就是为什么您在多次运行查询后会收到文件已创建的消息。

从 mysql 命令行运行 show variables like '%dirdata%';，您应该会看到类似于以下内容的输出：

mysql> show variables like '%datadir%';
+---------------+-------------------------------------+
| Variable_name | Value                               |
+---------------+-------------------------------------+
| datadir       | c:\wamp\bin\mysql\mysql5.6.17\data\ |
+---------------+-------------------------------------+
1 row in set (0.35 sec)

在 Windows 中导航到该文件夹，您应该会在那里找到您的文件。

【讨论】：

【解决方案2】：

SELECT r INTO OUTFILE 'c:\dev\myA2.txt'
  FIELDS TERMINATED BY ',' OPTIONALLY ENCLOSED BY '"'
  LINES TERMINATED BY '\n'
  FROM a2;

-- leads me to believe it works first time with rowcount output
-- but it does not put file in dev
-- run it again it says error 1086: File 'c:devmyA2.txt' already exists

so that means it wrote it to c:

the default of what mysql query engine has for c: at that time

I did not hunt for it !

the following works great (note the double slashes \\):

SELECT r INTO OUTFILE 'c:\\dev\\drew_so_answers\\myA2.txt'
  FIELDS TERMINATED BY ',' OPTIONALLY ENCLOSED BY '"'
  LINES TERMINATED BY '\n'
  FROM a2;

【讨论】：