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

All of these undocumented ones

xp_getnetname 

xp_fileexist 

xp_dirtree 

xp_subdirs 

sp_who2

xp_getfiledetails 

xp_fixeddrives 

Sp_tempdbspace 

xp_enumdsn 

xp_enumerrorlogs

sp_MSforeachtable 

sp_MSforeachDB 

See here: Undocumented stored procedures

And now since SQl Server 2005 all the Dynamic Management Views like sys.dm_db_index_usage_stats