I need to construct complex SQL request, like:string sql = ("INSERT INTO test.geomagnetic (`date`, `a_fredericksburg`, `fredericksburg`, `a_college`, `college`, `a_planetary`, `planetary`) VALUES ('%s', '%s', '%s', '%s', '%s', '%s', '%s');", date[i], a_fredericksburg[i], fredericksburg[i], a_college[i], college[i], a_planetary[i], planetary[i]);
I except that writefln have some behavior as string concatenation, but it does not.
IS there any way to put needed values in place of %s in string?
