This is often helpful to diagnose connection problems, such as bad username/passwords or wrong database or schema specified, etc.
一般来说，对于诊断连接错误、用户名/口令错误、指定的数据库或模式错误等，非常有效。
This is often helpful to diagnose connection problems, such as bad username/passwords or wrong database or schema specified, etc.
一般来说，对于诊断连接错误、用户名/口令错误、指定的数据库或模式错误等，非常有效。
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