IndexOf function in T-SQL

Question

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?

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Answer 1

You can use either CHARINDEX or PATINDEX to return the starting position of the specified expression in a character string.

CHARINDEX('bar', 'foobar') == 4
PATINDEX('%bar%', 'foobar') == 4

Mind that you need to use the wildcards in PATINDEX on either side.