Mysql sum 2表得到了循环sql

这是我售出的桌子：

SELECT brg_laku.id_brg, SUM( brg_laku.dibeli ) AS sold, SUM( stok_brg.stok ) AS stock
FROM brg_laku, stok_brg
WHERE stok_brg.id_brg = brg_laku.id_brg
GROUP BY stok_brg.id_brg, brg_laku.id_brg 

这是使用上面代码的视图：

SELECT brg_laku.id_brg, SUM( brg_laku.dibeli ) AS sold, SUM( stok_brg.stok ) AS stock
FROM brg_laku, stok_brg
WHERE stok_brg.id_brg = brg_laku.id_brg
GROUP BY stok_brg.id_brg, brg_laku.id_brg 

这是我的stok表：

SELECT brg_laku.id_brg, SUM( brg_laku.dibeli ) AS sold, SUM( stok_brg.stok ) AS stock
FROM brg_laku, stok_brg
WHERE stok_brg.id_brg = brg_laku.id_brg
GROUP BY stok_brg.id_brg, brg_laku.id_brg 

---

如何在SQL中正确求和？

您应该加入结果和

id_bl id_brg     dibeli harga_laku tgl        jam 
   10 BRG-000001      2      30000 2018-03-16 10:48:35
   11 BRG-000001      1      35000 2018-03-16 10:48:38
   12 BRG-000003      5      30000 2018-03-16 10:48:41
   13 BRG-000003      4      35000 2018-03-16 10:47:13 

---

编辑您的问题，并在问题中以文本形式提供示例数据和所需结果。这里的人怎么知道“正确的总和”应该是什么？你能解释一下t.sum\u stock列吗？因为我的表“t on t”中没有这个列。它是什么mean@ViviNovitaSari .. t是一个表名别名add，用于在内部联接子查询中分配表名。sum_stock是一个列名别名，用于在建立内部联接后使子选择sum结果易于访问。。希望这是清楚的。。让我知道