What does the SQL # symbol mean and how is it used?

Question

Can someone please explain to me what the # symbol means in MS SQL Code.

I\'ve tried Googling it, and even searching on StackOverflow,

Answer 1

The other answers are correct if you're dealing with SQL Server, and it's clear that you are. But since the question title just says SQL, I should mention that there are some forms of SQL such as MySQL where a pound sign is used as an alternative commenting symbol.

#This is a comment.

https://dev.mysql.com/doc/refman/5.7/en/comments.html