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How to use different row methods to get no of rows in a table, update table etc in Java
Problem Description
How to use different row methods to get no of rows in a table, update table etc?
Solution
Following example uses first, last, deletRow, getRow, insertRow methods of ResultSet to delete or insert a Row & move pointer of ResultSet to first or last Record.
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"); } }
Result
The above code sample will produce the following result. For this code to compile your database has to be updatable. The result may vary.
No of rows in table = 5 Row added first row deleted
java_jdbc.htm
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