While searching for appropriate string comparison functions in TSQL, I came across these pages implementing a couple of
string functions: Capitalize, Center, Count Substring in String, EndsWith, ExpandTabs, IsAlnum, IsAlpha,
IsDigit, IsLower, IsTitle, IsSpace, LJust, LStrip, RFind, RJust, RStrip, Strip, SwapCase, Title, Zfill
and string tuple functions: Split, SplitLines, Within, EndsWith, StartsWith, Contains, Join, Parts, Partition, RPartition
See here for more TSQL articles by the authors.