public boolean deleteStudent(String [] ids) {

            Connection connection = null;
            String query;
            boolean result = false;

            try {
                Context initCtx = new InitialContext();
                Context envCtx = (Context) initCtx.lookup("java:comp/env");
                DataSource ds = (DataSource) envCtx.lookup("jdbc/cmsDB");
                connection = ds.getConnection();

                QueryRunner run = new QueryRunner(ds);
                query = "delete tbl_student where student_id";// what should i put here???
                int nor = run.update(query, ids); //nor = no of records

                if (nor > 0) {
                    result = true;
                } else {
                    result = false;
                }
            } catch (NumberFormatException e) {
                // e.getMessage();
                e.printStackTrace();
            } catch (SQLException e) {
                e.printStackTrace();
            } catch (Exception e) {
                e.printStackTrace();
            } finally {
                DbUtils.closeQuietly(connection);
            }
            return result;
        }