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.
Oral Fungus Causes Common Mouth Infection. If you want to avoid or control a common infection called oral thrush, you've got one more reason to visit your dentist, especially if you have diabetes, wear dentures or have a problem with your immune system. Also called candidiasis, the fungal infection causes painful white spots on the tongue or inner cheeks. The lesions may bleed slightly when scraped or when you brush your teeth. Sometimes oral thrush spreads to the roof of the mouth, gums, tonsils or the back of the throat.