How to Create Empty GUID in SQL Server

What is GUID?

The GUIDs are used to generate and then store values that are unique, across different servers and databases. They are nothing but a string of characters that provide unique values each time the GUID is executed for the creation of new values. the GUIDs are commonly expressed in the form of 32 hexadecimal digits, for example:...

Why GUIDs are Used?

GUIDs can be produced by using the built-in function called the NEWID() Function, and if we want to insert a new value into a GUID’s column then we can use the same function (NEWID() function)....

How to Check if a GUID is NULL?

It is a very important factor to check whether a GUID is null or not because it is important for us to create a GUID if it is a null if we do not create a GUID in case it is null then it can throw errors as we have understood the GUID can be used to link multiple databases or servers together using a common column etc. so now let us understand how to check if a GUID is null or not....

How to Create GUID With Non-Null Values

So far we learnt how we can check if the GUID is empty or not but how can we create values for the GUID if it is empty? again, we can simply do this by using the if statement again and if there is an empty GUID present then we will simply create the values for it....

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:...

How to Create Empty GUID in SQL Server

The easiest way to create an empty GUID in the MS SQL Server is by using cast() function, a cast function simply converts a value into a specific data type....

How to Check Whether a GUID is Empty GUID or Not?

As we understood in the previous section a GUID can be null which means that there is no value present in the row of the GUID column but when we are talking about whether GUID is empty or not then we have to think if a GUID has been in the form of multiple zeros which can be used to represent a 32 bit hexadecimal format if multiple zeros are present in the form of 32 bit hexadecimal format then we can say that a GUID is an empty GUID....

Conclusion

So far we learned what GUID is, how we can check whether the GUID is null or not, we also learned the NULL GUID vs. the Empty GUID, we learned to create the empty GUID and check whether the GUID is an empty multiple servers, databases and we want to connect columns or some part of the data among those databases using a method that can store unique values for the connection....