Tuesday, December 23, 2014

Execute multiple SQL statements and Use row methods in java pro



Execute multiple SQL statements

import java.sql.*;
public class jdbcConn 
 {
   public static void main(String[] args) throws Exception
   {
      Class.forName("org.apache.derby.jdbc.ClientDriver");
      Connection con = DriverManager.getConnection
      ("jdbc:derby://localhost:1527/testDb","name","pass");
      Statement stmt = con.createStatement
      (ResultSet.type_scroll_sensitive,
      ResultSet.concur_updatable);
      String insertEmp1 = "insert into emp values
      (10,'jay','trainee')";
      String insertEmp2 = "insert into emp values
      (11,'jayes','trainee')";
      String insertEmp3 = "insert into emp values
      (12,'shail','trainee')";
      con.setAutoCommit(false);
      stmt.addBatch(insertEmp1);
      stmt.addBatch(insertEmp2);
      stmt.addBatch(insertEmp3);
      ResultSet rs = stmt.executeQuery("select * from emp");
      rs.last();
      System.out.println("rows before batch execution= "+ rs.getRow());
      stmt.executeBatch();
      con.commit();
      System.out.println("Batch executed");
      rs = stmt.executeQuery("select * from emp");
      rs.last();
      System.out.println("rows after batch execution=  + rs.getRow());
   }
} 

Use row methods

import java.sql.*;
public class jdbcConn 
{
   public static void main(String[] args) throws Exception
  {
      Class.forName("org.apache.derby.jdbc.ClientDriver");
      Connection con = DriverManager.getConnection
      ("jdbc:derby://localhost:1527/testDb","name","pass");
      Statement stmt = con.createStatement
      (ResultSet.type_scroll_sensitive, 
      ResultSet.concur_updatable);
      String query = "select * from emp";
      ResultSet rs = stmt.executeQuery(query);
      rs.last();
      System.out.println("No of rows in table="+rs.getRow());
      rs.moveToInsertRow();
      rs.updateInt("id", 9);
      rs.updateString("name","sujay");
      rs.updateString("job", "trainee");
      rs.insertRow();
      System.out.println("Row added");
      rs.first();
      rs.deleteRow();
      System.out.println("first row deleted");
   }
}

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