Try logging in with an invalid user name or password, and notice that an appropriate default error message appears.
尝试输入非法的用户名和密码，你会看到默认的错误信息。
When a user sends an empty file or enters an invalid file name, the diamond operator returns the uninitialized defined value, causing a crash of the.
当用户发送一个空文件或键入无效的文件名时，菱形操作符返回未初始化定义的值，使。
User name or password is invalid.
“： ”错误的用户名或密码。“
If existing queries, views, user-defined functions, stored procedures, or programs refer to that table, the name modification will make these objects invalid.
如果现有查询、视图、用户定义的函数、存储过程或程序引用该表，则名称的修改将使这些对象无效。
The User Name, Domain and/or Password for this account is invalid.
所用帐户为域间信任帐户。
The User Name, Domain and/or Password for this account is invalid.
所用帐户为域间信任帐户。
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