如何从结果查询中插入查询以在Java NetBeans上插入查询？

Question

I have a problems in java progamming, I want to add primary key from x table to insertion query

String sql = "(select id_transaksi from transaksi where id_transaksi in (SELECT MAX(id_transaksi) FROM transaksi))"

koneksi.stat.executeUpdate("insert into detail_transaksi values(null,'"+sql+"','"+produk.getText()+"','"+tgl+"','"+beli.getText()+"','"+bayar.getText()+"')");

anyone can help me? I want to add the result of query to insertion query? thanks.

thanks for the answer, but I mean, I want to add the first query for the second query, so I put id from table x to insert query to table y, I use it in java programming.

Answer 1

The things which u need to do are:

Step 1) Select your required value ( primary key) from the database, which can be done as follows

i) Establish a connection to database

eg: Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");             
    Connection con=DriverManager.getConnection("jdbc:odbc:kkk");

ii) Frame a suitable query

eg: String sql = "select id_transaksi from transaksi where id_transaksi in (SELECT      MAX(id_transaksi) FROM transaksi))"

iii) Prepare a Statement

 eg: PreparedStatement st=con.prepareStatement(sql);

iv) Execute your query and store the result in resultset object

eg: ResultSet  rs=st.executeQuery();

v) Retrieve the required value(primary key) from the result set Object to a variable of appropriate datatype.

eg: String my_rqd_value=rs.getString(“id_transaksi”);

Step 2) Now u have the value to be inserted in the variable my_rqd_value which can be inserted to any table as you prefer, follow these steps to insert.

i) Frame a suitable query.

eg: sql = ""insert into detail_transaksi values(null,'"+my_rqd_value+"','"+produk.getText()+"','"+tgl+"','"+beli.getText()+"','"+bayar.getText()+"')");

ii) Prepare a Statement.

eg: st=con.prepareStatement(sql);

iii) Execute your query.

rs=st.executeUpdate();