The SQL NULL is the term used to represent a missing value. A NULL value in a table is a value in a field that appears to be blank. A field with a NULL value is a field with no value. It is very important to understand that a NULL value is different than a zero value or a field that contains spaces.
Median rhomboid glossitis is a condition that can affect your tongue if you have oral thrush. It causes a red, smooth patch or lump to develop in the middle of the top part of your tongue, which can be sore. You're more likely to develop oral thrush if you: have recently taken antibiotics.
According to the Mayo Clinic, white tongue happens as a result of overgrown and swollen papillae on the tongue's surface. Bacteria and dead cells that lodge between the papillae cause the white coating. Numerous causes encourage white tongue, including alcohol and tobacco use, fever, dry mouth and mouth breathing, dehydration and poor oral care. Many causes overlap with the causes of bad breath, including bacteria in the mouth, so it's easy to see how the conditions how the conditions intersect.