$sth = $dbh->prepare("INSERT INTO snp_db (rs,chr_position,band,alleles,het,validated,gene,role,relative_pos,aa_change,flanking_seq) VALUES (?,?,?,?,?,?,?,?,?,?);");

$sth->execute($rs_number,$position,$band,$alleles,$het,$val,$gene,$role,$pos,$aa);

##</code><code>##

$sth = $dbh->prepare("UPDATE snp_db SET (chr_position,band,alleles,het,validated,gene,role,relative_pos,aa_change,flanking_seq) VALUES (?,?,?,?,?,?,?,?,?) WHERE rs = $rs_number;");

$sth->execute($position,$band,$alleles,$het,$val,$gene,$role,$pos,$aa);