Given an email address column, I need to find the position of the @ sign for substringing.
What is the indexof function, for strings in T-SQL?
indexof
L
CHARINDEX is what you are looking for
select CHARINDEX('@', 'someone@somewhere.com') ----------- 8 (1 row(s) affected)
-or-
select CHARINDEX('c', 'abcde') ----------- 3 (1 row(s) affected)