finish the validation part :
1) check if the type of the attributes_names do good with the table_values
2) check if a record of the same primary key already existed

still to be done:
1) the tuple to be added into the table should be in the right sequence as the attribute emerges in the table
or we will add a wrong tuple with the wrong sequence into the table
and if certain attribute in the tuple should be left as null or "" if the value doesn't exist in the record_values
2) it seems that only one query can be executed even if there are more than 1 query in the query.txt