Can someone explain this SQL injection attack to me?

Can someone explain this SQL injection attack to me?

sql asp-classic sql-injection xss

sql

Conversion failed when converting from a character string to uniqueidentifier

sql sql-server-2008 asp-classic

sql

Case Statements versus coded if statements

sql asp-classic case-statement

sql

How to prevent 'query timeout expired'? (SQLNCLI11 error '80040e31')

sql sql-server vbscript asp-classic sql-server-2012-express

sql

Password mismatch while logging to sql server

sql sql-server asp-classic sql-server-2008-r2

sql