如何从Java的第一行将数据插入mysql表的特定字段

Question

I have a table called Cast with these fields : Id, CastName, CastImdbId . This table already has many records. Now, I would like to add 3 new fields to this table which are (gender, castBirthDate, castBirthPlace) . The problem is that "insert into" add new data to the end of table (after the last record), but I need to add these data starting from the first record. Could someone please let me know if it is possible and how?

This is part of my code which has the problem:

 try{
     String query = "INSERT into Cast (gender, castBirthDate, castBirthPlace)" + "VALUES (?, ?, ?)";
     PreparedStatement preparedStmt = conn.prepareStatement(query);
     preparedStmt.setString (1, gender);
     preparedStmt.setString (2, dateOfBirth);
     preparedStmt.setString (3, placeOfBirth);
     preparedStmt.executeUpdate();

    }catch (Exception e){
        System.err.println("Got an exception!");
        System.err.println(e.getMessage()); 
    }

Answer 1

Use an ALTER statement on the table.

Example

ALTER TABLE Cast
ADD (gender varchar2(1), //Depending on "F" or "Female"
     castBirthDate Date, 
     castBirthPlace varchar2(50));

Then UPDATE the new fields. Which can be done in many ways. Avoid the INSERT .

UPDATE in jdbc is like this:

StringBuilder sql = new StringBuilder("");
sql.append("UPDATE Cast ");
sql.append("SET gender = ?, ");
sql.append("castBirthDate = ?, ");
sql.append("castBirthPlace = ? ");
sql.append("WHERE actor_id = ?"); //Assuming...

PreparedStatement preparedStmt = conn.prepareStatement(query);
preparedStmt.setString (1, gender);
preparedStmt.setString (2, dateOfBirth);
preparedStmt.setString (3, placeOfBirth);
preparedStmt.executeUpdate();

Answer 2

Do you want to set those fields values to the existing records? Then you might want to UPDATE them.

As the name implies, an INSERT statement will add new rows at the end of the table.

UPDATE will modify the row or rows you specify, changing the values on the fields you specify.

UPDATE table SET column1='value1', column4='value2' WHERE column2='thisValue'

In your case, let's say you want to set 'Female' to "Halle Berry"

UPDATE Cast SET gender='Female' WHERE CastName='Halle Berry'

You should of course use IDs and references like F for 'female' and not the whole word.