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.
1 Once you find it your tongue will take care of itself so fast you'll be absolutely amazed. 2  One of the major causes of a pale tongue is anemia. 3  It is a nutritional problem that can often be treated with iron and/or B-12 supplements. 4  One of the major causes of a beefy scalloped tongue is Thyroid issues.