Question

I’m working with SQL now in my programming, and I’m querying a database, like so.

scCommand = new SqlCommand("SELECT LegislationID FROM Legislation WHERE Number =  @ECERegulation", sconConnection);
        scCommand.Parameters.Add("@ECERegulation", SqlDbType.NVarChar);
        scCommand.Parameters["@ECERegulation"].Value = strECERegulation;

        return (int)scCommand.ExecuteScalar();

My question is, what would be returned if my parameter did not match anything in the table that I am querying? I need to have an if statement to deal with a non-matching ECERegulation. Would it return null? Or would it return the LegislationID of zero? Any help would be appreciated.

Answer 1

The docs:

Return Value
The first column of the first row in the result set, or a null reference (Nothing in Visual Basic) if the result set is empty. Returns a maximum of 2033 characters.