How to create an automatically increment column in Oracle DB Table?

Question

Hi To All
Here I am trying to create a table in Oracle that creates an automatically increment column in Oracle DB Table. i searched almost all Forums.(Even in Oracle). They are saying that, that logic u must implement in Java Code.(*Takes Maximum no from table, add +1 to it, and store it back again)*. apart from this, while creating an table in Oracle, is there any facility like MySQL Database? please help me. Thanks in advance.

Answer 1

Hi BalusC
Thanks for Your Response and clue. with that, i succeeded in my application. Thank you very much. here i am giving you the details which i did.
1. I Created a table named orders in Oracle like this.
   CREATE TABLE ORDERS (ORDER_ID NUMBER, CUSTOMER_ID NUMBER, ISBN NUMBER,
                               DESCRIPTION NCHAR(5));
                   2. I created one sequence in Oracle like    CREATE SEQUENCE SEQ01 INCREMENT BY 1 START WITH 1000     3. Then i have written jdbc program like this
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
public class SequenceTest {
     public static void main(String[] args)throws Exception{
          try {
          Class.forName("oracle.jdbc.driver.OracleDriver");
          Connection con=DriverManager.getConnection("jdbc:oracle:thin:@192.168.1.135:1521:orcl","scott","tiger");
          String cols[] = {"ORDER_ID", "DESCRIPTION"};
          PreparedStatement pstmt = con.prepareStatement("INSERT INTO ORDERS (ORDER_ID, CUSTOMER_ID, ISBN,DESCRIPTION) VALUES            (SEQ01.NEXTVAL, 104, 966431505,?)", cols);
          pstmt.setString(1,"Desc3");          
          pstmt.executeUpdate();
          ResultSet rs=pstmt.getGeneratedKeys();     
                System.out.println("---- One Row Inserted ----");
          } catch (Exception e) {
               System.out.println("---- Failed Due To "+e);               
   4. When i ran above program 5 times, i got the following Data into my Oracle Table (select * from orders)
  ORDER_ID CUSTOMER_ID       ISBN DESCR
      1000         101  966431502 Desc0
      1001         102  966431503 Desc1
      1002         103  966431504 Desc2
      1003         104  966431505 Desc3
      1004         104  966431505 Desc3
      1005         105  966431506 Desc4
6 rows selected.
  But i dont know how to do this type of program with out using prepared statements. i tried, and i got exception *"Missing Expression"* .
Once again Thank You very much for your clue.