错误提示：Error: ”Can t create/write to file “C:\\WINDOWS\\TEMP\\#sql_738_0.MYD (Errcode: 17)Errno.: 1
问题分析：
1、C:WindowsTEMP 文件夹权限不够，至少也要给出 USERS 组的可读可写权限；
2、C:WindowsTEMP 文件夹的磁盘满了，文件写不进去了，清空 TEMP 文件夹；
3、第三方限制（如杀毒软件的限制）
解决方法，先从my.cnf配置开始
在my.ini中[d]里面添加一行
tmpdir="d:/mysql/temp/"
指定创建创建临时文件的目录,大量查询时会用到
重新启动mysql服务使之生效.
1）你的服务器装了 MCAFEE 杀毒软件，它的访问保护禁止了 TEMP 文件可写，修改访问保护设置；
2）还是MCAFEE杀毒软件的问题，解决步骤：按访问扫描属性 - 所有进程 - 检测项 - 扫描文件（在写入磁盘时 ）勾去掉就好了。
打开McAfee VirusScan控制台->按访问扫描程序->属性->所有进程->检测项->排除项->添加D:mysqltemp
排除时间选择读取时写入时.
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