Question

我有4个不同列的表。但是在4个表中我有两个常见的列。一个Vendor_id和Stock.This Vendor_id可以在所有4个表中重复。现在ny要求是我要在所有4个表中汇总与所有供应商ID相关的所有股票。例如：

表一

+----------+-------------+
|vendor_id | stoclk      | 
+----------+-------------+
| 1234    | 75.00        | 
+----------+-------------+
| 1234    | 75.00        | 
+----------+-------------+
| 789      | 75.00       | 
+----------+-------------+

表二

+----------+-------------+
|vendor_id | stoclk      | 
+----------+-------------+
| 1234     | 5.00        | 
+----------+-------------+
| 2389     | 15.00       | 
+----------+-------------+
| 789      | 15.00       | 
+----------+-------------+

我的deisred out put将

+----------+-------------+
|vendor_id | stoclk      | 
+----------+-------------+
| 1234     | 155.00      | 
+----------+-------------+
| 2389     | 15.00       | 
+----------+-------------+
| 789      | 90.00       | 
+----------+-------------+

对于我使用以下查询。

    SELECT vendor_id,SUM(stock) FROM (
          SELECT vendor_id, stock FROM hs_tab1
          UNION ALL
          SELECT vendor_id, stock FROM hs_tab2
          UNION ALL
     )a

但我只获得一个供应商ID和总数或这样的股票

   +----------+-------------+
   |vendor_id | stoclk      | 
   +----------+-------------+
   | 1234     | 260.00      | 
   +----------+-------------+

请告诉我一些我做错的事情？

Answer 1

试试这个： -

SELECT vendor_id,SUM(stock) 
FROM ( SELECT vendor_id, stock FROM hs_tab1
       UNION ALL
       SELECT vendor_id, stock FROM hs_tab2
     )a
GROUP BY vendor_id;

我想在4个不同的表mysql中总结相同的列

1 个答案: