db在java中使用SQLite更新问题

Question

我在使用以下代码更新sqlite数据库时遇到问题。任何想法，这里可能有什么问题？

    SQLiteDatabase db = openOrCreateDatabase("MyDB2", MODE_PRIVATE, null);
        db.execSQL("CREATE TABLE IF NOT EXISTS MyTable (Id VARCHAR, BetSum VARCHAR, Bet VARCHAR, Bank VARCHAR, Previous VARCHAR);");

            Cursor cursor = db.rawQuery("SELECT COUNT(*) FROM MyTable;", null);
            cursor.moveToFirst();
            int count = cursor.getInt(0);
            if (cursor.getInt(0)==0)
            {
                ContentValues newValues = new ContentValues();
                newValues.put("Previous","717");
                db.update("MyTable", newValues, "id=1", null)  
            }
       }