PATINDEX (SQL Server Compact Edition)
Returns the starting position of the first occurrence of a pattern in a specified expression, or zeros if the pattern is not found, on all valid text and character data types.
A literal string. Wildcard characters can be used; however, the % character must precede and follow the pattern (except when searching for first or last characters). The pattern argument is an expression of types that can be implicitly converted to nchar, nvarchar, or ntext.
An expression, usually a column that is searched to find the specified pattern. The expression argument can be nchar, nvarchar, or ntext.