Empty GUID vs. Null GUID
Some people often confuse the empty guid with the null guid, though there is a very important difference between the two. The null guid simply means that there is no value assigned to the guid whereas the empty guid means that the values are present in the guid and all of the values are simply zeros in the form of hex, for example:
00000000-0000-0000-0000-000000000000
How to Check GUID is Null or Empty in SQL Server
GUID stands for Globally Unique Identifier, the GUID is a 16-byte long binary data type. the GUID is special because it is globally unique across all the databases, tables, and servers available. In the GUID there is a unique reference number present which is generated by the algorithm every time we execute the query to generate GUID. the GUID is stored as a 128-bit value but when it is displayed by the machine or system it is displayed as 32 hexadecimal digits. in this article we will learn what is GUID, why they are used as well as how to create them, and whether a GUID is null or empty in the SQL Server.