此数据库没有有效所有者，因此无法安装数据库关系图支持对象
创建数据库关系图时遇到这个问题 解决方法：右键点击该数据库，点击属性，在选择页里点击文件，把所有者改为sa，确定即可。
创建数据库关系图时遇到这个问题
解决方法：右键点击该数据库，香港虚拟主机，点击属性，免备案空间，香港虚拟主机，在选择页里点击文件，把所有者改为sa，确定即可。
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PHP FFmpeg extension installation guide: easy-to-follow tutorial
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