Help Needed..... Problems with Primary Key.

Question

Hello all.
ive been trying to do this for a while but not luck, im after some advice on ive got a java program connected to mysql database and i want to create a copy of a table, then be able to delete records from the new table. it seems like you cannot update copied tables because it doesnt copy the primary keys because i get
SQLException: Result Set not updatable (referenced table has no primary keys)
is there a way around this?
heres what i have:
public void createTemporyTables(){
try{
Statement stmt5 = conn.createStatement();
int rows1 = stmt5.executeUpdate("CREATE TABLE tempAnimals SELECT * FROM animals");
Statement stmt6 = conn.createStatement();
int rows2 = stmt6.executeUpdate("CREATE TABLE tempAnimalsQuestions SELECT * FROM animalsquestions");
if (rows1 == 0){
System.out.println("Don't add any row!");
else{
System.out.println(rows1 + " row(s)affected.");
if (rows2 == 0){
System.out.println("Don't add any row!");
else{
System.out.println(rows2 + " row(s)affected.");
catch(Exception e)
System.out.println("SQLException: " + e.getMessage());
System.out.println("Method = createTemporyDatabase Error");
public void remove(){
try{
Statement stmt13 = conn.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_UPDATABLE);
ResultSet yesItems = stmt13.executeQuery("SELECT * FROM tempanimals WHERE Q5 =\"y\"");
Statement stmt14 = conn.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_UPDATABLE);
ResultSet yesQuestions = stmt14.executeQuery("SELECT * FROM tempanimalsquestions WHERE question = '5'");
while(yesItems.next())
yesItems.deleteRow();
while(yesQuestions.next())
yesQuestions.deleteRow();
catch(Exception e)
System.out.println("SQLException: " + e.getMessage());
System.out.println("Method = removeYes Error");
any help will be much appreciated..
Ben

Answer 1

Hi,
Your temperary table has no primary key. Mention primary key field, when creating temperary table. See below statement change primary key field according to you.
int rows1 = stmt5.executeUpdate("CREATE TABLE tempAnimals (primary key(animalid)) SELECT * FROM animals");
int rows2 = stmt6.executeUpdate("CREATE TABLE tempAnimalsQuestions (primary key(questionid)) SELECT * FROM animalsquestions");Regards,
Ram.