Assuming that you are trying to update a table called DataBase, there are two problems:
1) Your UPDATE command syntax is wrong (See the link provided by NPC in the comments).
2) Database is a reserved word in SQL. It's okay to use reserved words as object names but you'll need to escape them with square brackets when you refer to them.
As such, your SQL should look like this:
UPDATE [DataBase] SET Serial = @Serial, Name = @Name
Note that that will update every row in the table as there is no WHERE clause.