MSSQL - what is the guid number?

Question

SQL Server

2008 version.
I pick the table, in two tables there is a field guid uniqueidentifier type which it is not clear to me as are filled. values ​​look like this
{F607EFA1-FB80-43D6-8DB7-00008AF950CB}
How can these things be formed and what are they used for? in transactions? how to form them? Simply inserting a row into a table does nothing, i.e. field is not generated automatically.
I don't see anything in the procedures either. the code itself that forms the records cannot be viewed. You need to figure it out in order to add a new record, I'm not strong in MSSQL, what if this is some kind of obvious thing?

Answer 1

Right click on the table. Then fields. Stand on the right one, and see what kind of function it is formed (although it is already written which one) - and if it is there, then do not worry about the uniqueness, it will form itself.
If there is no default value, then this field is filled from the procedure / function when inserting a replacement. Where - it is necessary to search.
The code that generates the records, why can't you suddenly look at it? The profiler can't be started, right?