Question

I have a table where I have to do a SELECT ... BETWEEN start_date AND end_date, as well as insert Date values into the same table.

I read things like:

java.util.Date now = new java.util.Date();
pStmt.setDate( 1, new java.sql.Date( now.getTime() ) );
pStmt.setTimestamp( 2, new java.sql.Timestamp( now.getTime() ) );
pStmt.executeUpdate();

But that kind of code sets or gets the current date, doesn’t it? I want to insert and select custom dates myself.

I also read it here at StackOverflow:

SELECT *
FROM myTable
WHERE ( YEAR(myfield) = '2009')
  AND ( MONTH(myfield) = '1')

Is it also possible to make the Date fields String, then use StringTokenizer to extract only the day, month or year information and use them in a SELECT similar to this code? (In case my first – and simpler – idea is impossible.)

So until now, there’s two possible solutions. I also need to know which one is faster since the database accessed is in a fail-safe / critical system (a bank) with lots of data.

Answer 1

The first approach is better, because you were able to use date functions to manipulate values.

private void executeQuery(java.util.Date startDate, java.util.Date endDate) throws SQLException {
  Connection conn = null;
  PreparedStatement pstmt = null;
  try {
    conn = getConnection();
    String query = "select ... between ? and ?";
    pstmt = conn.prepareStatement(query);
    pstmt.setDate(1, new java.sql.Date(startDate.getTime()));
    pstmt.setDate(2, new java.sql.Date(endDate.getTime()));
    //return results
    ResultSet rs = pstmt.executeQuery();
    rs.last();
    System.out.println("last row = " + rs.getRow());
  } finally {
    if (pstmt != null) {
      pstmt.close();
    }
    if (conn != null) {
      conn.close();
    }
  }
}