sql - from one table to another table in the same database -


i wrote function, should write value of column 'klausurdatum' table 'klausuren' in table 'studenten.klausurid' (concerning corresponding 'klausur') in column 'pruefungsdatum'. sql error: systax error. both tables in same database.

function klausurdatum_laden (pdo $dbh, $parameter, &$smarty){     global $pruefungsdatum;      $query = "insert studenten".$parameter['klausurid']." ( pruefungsdatum ) select klausurdatum klausuren id=".$parameter['klausurid']." ";         $stmt = $dbh->prepare($query);         $stmt->execute();         $pruefungsdatum = $stmt->fetch()[0];         $smarty->assign('pruefungsdatum', $pruefungsdatum);  }


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