Useful system stored procedures in SQL Server

Question

I recently discovered that I could use the sp_help to get a table definition and have been hooked onto it since then. Before my discovery, I had to open up the Obje

Answer 1

master.dbo.xp_cmdshell

I can't list the number of times I didn't have RDP access to a box but did have a SQL login with sufficient permissions to execute that in order to run shell commands on it.