两个 Table 返回相似数据

Question

我已经尝试了所有我能想到的连接，但无法解决:(

我有两张桌子

Table X 和 Table Y

两个表都包含项目代码和数量

我正在寻找的是可以帮助我进行比较的东西

理想情况下，我想看到这样的东西，这可能吗？

示例数据 TableX

+-----------+-----+
| Item Code | QTY |
+-----------+-----+
| A         | 1   |
+-----------+-----+
| B         | 2   |
+-----------+-----+
| C         | 3   |
+-----------+-----+

Table Y

+-----------+-----+
| Item Code | QTY |
+-----------+-----+
| A         | 1   |
+-----------+-----+
| D         | 2   |
+-----------+-----+
| E         | 3   |
+-----------+-----+

最终结果我想看到这样的东西：

+-----------+-------------+-------------+
| Item Code | TABLE X QTY | Table Y QTY |
+-----------+-------------+-------------+
| A         | 1           | 1           |
+-----------+-------------+-------------+
| B         | 2           | 0           |
+-----------+-------------+-------------+
| C         | 3           | 0           |
+-----------+-------------+-------------+
| D         | 0           | 2           |
+-----------+-------------+-------------+
| E         | 0           | 3           |
+-----------+-------------+-------------+

这是否可行请帮助

Answer 1

这看起来像 full join

select coalesce(x.item, y.item) as item, 
       coalesce(x.qty, 0) as x_qty, coalesce(y.qty, 0) as y_qty
from x full join
     y
     on x.item = y.item

Answer 2

尝试使用 full outer join...

SELECT
    ISNULL(X.[Item Code],Y.[Item Code]) AS [Item Code],
    ISNULL(X.QTY,0) AS [TABLE X QTY],
    ISNULL(Y.QTY,0) AS [TABLE Y QTY]
FROM X
    FULL OUTER JOIN Y
        ON X.[Item Code] = Y.[Item Code]

两个 Table 返回相似数据

Two Table Returning Similar Data

sql

sql-server-2014