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.
spot under tongue pierce. Secondly, tongue piercing is another cause of dark spots on tongue and lips. After the tongue piercing has healed, a dark spot is left on the tongue. The piercing also can lead to dark spot on tongue symptoms because the practice promotes fungal infections. More so, at pierce point, normal tongue pigmentation is lost.
As it is mostly caused by overgrowth of fungus called Candida, this condition is also referred to as Candidiasis of the mouth and throat. The presence of white patches on the surface of the tongue and bad breath are the most common white coated tongue symptoms. The coating can also be yellow or brown in color.In severe cases, coated tounge may appear as though it is covered with fur or hair (Hairy Tongue). Coated tongue causes no pain in most of the cases. The condition is more common in infants, people wearing dentures and individuals with weakened immune system.he presence of white patches on the surface of the tongue and bad breath are the most common white coated tongue symptoms. The coating can also be yellow or brown in color. In severe cases, coated tounge may appear as though it is covered with fur or hair (Hairy Tongue).