Can you describe a little more what you want to achieve?
If you want to change/edit/modify a databank, you should take a look at the Data Table service (see OpenScript user guide . pdf ) chapter 4.3.
Make use of the following to manipulate data from a csv file-
Table table1 = utilities.loadCSV("csv path");
After loading to the table we can make use of variables to manipulate data.
getVariables().set("variable name",table1.getRow(row number).get(column number));