An expression that contains the sequence of characters to be found. The expression1 argument is an expression of the ntexttype or a data type that can be implicitly converted to nvarchar.
An expression that is typically a column searched for the specified sequence. The expression2 argument is an expression of the ntext type or a data type that can be implicitly converted to nvarchar.
The character position from which to start searching for expression1 in expression2. If start_location is not given, is a negative number, or is 0, the search starts at the beginning of expression2. The start_location argument can be tinyint, smallint, int, or bigint.