Hi Subbu, A Qualifier allows a field to maintain different type of data.For example ,if 'date' is a field with quilifier ,then that date field can hold a) creation date b)sold date c)delivery date etc....
Why Does My Mucus Change Color? If you've ever stopped to look at the contents of the tissue after you've blown your nose, you may have noticed that your mucus isn't always perfectly clear. It may be yellow, green, or have a reddish or brownish tinge to it. What do those colors mean? You might have heard that yellow or green mucus is a clear sign that you have an infection, but despite that common misperception, the yellow or green hue isn't due to bacteria. When you have a cold, your immune system sends white blood cells called neutrophils rushing to the area.
But, bright yellow mucus doesnât in itself indicate any specific health distress (although, it can certainly be a symptom of some). It can be attributed to common causes such as constipation and even allergies. Yellow mucus in stool remnants can in some cases be a cause for concern. Because yellow stools in general can refer to troubles with various organs, with common causes being infection and inflammation. The stomach, liver and pancreas can all be affected if yellow stools persist.