var ipAddress = '0.0.0.0';
var userName = 'username';
var userPassword = 'userpwd';
var dbName = 'dbname';
var tableName = "default_table";

var dbUrl = 'jdbc:mysql://' + ipAddress + '/' + dbName;

function test(){
  //needs proper database info still
  var range = SpreadsheetApp.getActiveSheet().getRange(1, 1);
  var e = {range:range};
  onEdit(e);
}

function onEdit(e){
  var range = e.range;
  var row = range.getRow();
  var col = range.getColumn();
  var activeSheet = SpreadsheetApp.getActiveSheet();
  var sheetName = activeSheet.getName();
  var columnName = activeSheet.getRange(1, col).getValue();
  var updatedValue = activeSheet.getRange(row, col).getValue();
  var tableName = getTableName(sheetName);
  updateRecord(tableName, columnName, row, updatedValue);
}

function getTableName(sheetName) {
  return tableName;
}

function updateRecord(tableName, columnName, row, updatedValue){
  var conn = Jdbc.getConnection(dbUrl, userName, userPassword);

  var stmt = conn.prepareStatement("UPDATE (tableName) " +
                                  "SET (columnName)=(updatedValue) " +
                                  "WHERE index=(row)");
  stmt.setString(1, tableName);
  stmt.setString(2, columnName);
  stmt.setString(3, updatedValue);
  stmt.setString(4, row);
  stmt.execute();
}