THERE is an extended sp called xp_fileexists
given a full path to a file Name
information is a 3 Bit vector
0/1 if a file doesn't/does exist
0/1 is given name is a directory
0/1 if the parent directory exists
For most DBAs, normalization is an understood concept, a bread and butter bit of knowledge. However, it is not at all unusual to review a database design by a development group for an OLTP (OnLine Transaction Processing) environment and find that the schema chosen is anything but properly normalized. This article by Brian Kelley will give you the core knowledge to data model.