sqlite将两个或多个行合并为同一个表中的一行

Question

问候语。我的问题是：我在表格中有一些值，如

SELECT * FROM items WHERE owner="Mark" AND object="apple";
+-------+-------+-------+-------+  
|  id   | owner | object|amount |  
+-------+-------+-------+-------+  
|  12   | Mark  | apple |   16  |  
+-------+-------+-------+-------+  
|  16   | Mark  | apple |    3  |  
+-------+-------+-------+-------+  
|  34   | Mark  | apple |    8  |  
+-------+-------+-------+-------+  
|  34   | Mark  | apple |    0  |  
+-------+-------+-------+-------+  

并且任务是抓住第一个，总结给所有其他金额，然后删除其余的所以最终所有将像

+-------+-------+-------+-------+  
|  id   | owner | object|amount |  
+-------+-------+-------+-------+  
|  12   | Mark  | apple |   27  |  
+-------+-------+-------+-------+