mysql - MySQL（5.6）“选择*进入outfile ..”不创建文件

Question

当我以 root 用户身份在本地主机上使用此命令时，它可以毫无问题地运行，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

Answer 1

在FROM你的*. 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有写入权限'C:\...\tableName.txt'

至于文件已经创建错误：

该文件可能是在mysql实际有权写入的另一个目录中创建的，例如数据目录。这就是为什么您在多次运行查询后收到文件已创建的消息的原因。

从 mysql 命令行 run 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​​，您应该在那里找到您的文件。

Answer 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;