ResultSet: getDouble(String columnLabel) : ResultSet « java.sql « Java by API






ResultSet: getDouble(String columnLabel)

 
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

public class Main {
  public static void main(String[] args) throws Exception {
    Class.forName("oracle.jdbc.driver.OracleDriver").newInstance();
    Connection conn = DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:ORCL", "yourName", "mypwd");
    Statement stmt = conn.createStatement();
    stmt = conn.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_UPDATABLE);
    ResultSet rs = stmt.executeQuery("SELECT ssn, name, salary FROM EMPLOYEES");
    printRs(rs);

    rs.beforeFirst();

    while (rs.next()) {
      double newSalary = rs.getDouble("salary") * 1.053;
      rs.updateDouble("salary", newSalary);
      rs.updateRow();
    }
    printRs(rs);
    conn.close();
  }

  public static void printRs(ResultSet rs) throws SQLException {
    rs.beforeFirst();

    while (rs.next()) {
      int ssn = rs.getInt("ssn");
      String name = rs.getString("name");
      double salary = rs.getDouble("salary");

      System.out.print("Row Number=" + rs.getRow());
      System.out.print(", SSN: " + ssn);
      System.out.print(", Name: " + name);
      System.out.println(", Salary: $" + salary);
    }
    System.out.println();
  }
}

   
  








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31.ResultSet: getString(int columnIndex)
32.ResultSet: getString(String columnLabel)
33.ResultSet: getTime(int columnIndex)
34.ResultSet: getTimestamp(int columnIndex)
35.ResultSet: getType()
36.ResultSet: getWarnings()
37.ResultSet: insertRow()
38.ResultSet: isAfterLast()
39.ResultSet: isBeforeFirst()
40.ResultSet: isFirst()
41.ResultSet: last()
42.ResultSet: moveToInsertRow()
43.ResultSet: next()
44.ResultSet: previous()
45.ResultSet: refreshRow()
46.ResultSet: relative(int rows)
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48.ResultSet: updateInt(String columnLabel, int x)
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