I want to sum up each row of data in one column of database table. How do I do that?
Here's the pieces of code of my sqlite database

```
  private static final String DATABASE_CREATE_PENGELUARAN =
         "CREATE TABLE if not exists " + PENGELUARAN_TABLE + " (" +
                  KEY_RPI + " integer PRIMARY KEY autoincrement," +
                  KEY_RTP + "," +
                  KEY_RLP + "," +
                  KEY_RSK + "," +
                  KEY_RNP + ");";

```

I want to sum up the data in each row of KEY\_RNP column. I think it can be used by using array but can anyone give me the exact code? Sorry for my bad english. Thanks!