Format a variant for SQL based only on its type
The variant value to format
Debug.Print xf.DbConnect.DumbSqlFormat(#1 January 1850#) -> #1 Jan 1850#
Debug.Print xf.DbConnect.DumbSqlFormat("Test") -> 'Test'
Debug.Print xf.DbConnect.IsValidSqlSmallDate(Null) -> NULL
Debug.Print xf.DbConnect.IsValidSqlSmallDate(23.4) -> 23.5