Question

我创建库存报告主要是为了显示当前数量，客户保留的数量和可用的总数量。

由于我使用LEFT JOIN和RIGHT JOIN但它无法工作，所以我在考虑UNION功能，但我无法使其工作。请你帮助我好吗。非常感谢你。

tbl_inventory
inv_id | pd_id | inv_qty_act |  inv_date | inv_note
 1     |  001  |  120        |  20-Sep-12| 
 2     |  003  |  387        |  1-Oct-12 |

tbl_reserve
res_id | cust_id | res_date | res_duedate | pd_id | res_qty | if_sent | res_note
 3     |  10     | 01-Oct-12|   17-Oct-12 |  001  |  135    |         | 
 4     |  9      | 01-Oct-12|   24-Oct-12 |  001  |  253    |         |
 5     |  22     | 01-Oct-12|   17-Oct-12 |  001  |  132    |         | 
 6     |  2      | 01-Oct-12|   24-Oct-12 |  002  |  446    |         | 


tbl_product
pd_id  | pd_name 
  001  |  des1
  002  |  des2
  003  |  des3

tbl_pdtn_startup
pdtn_st_id | pd_id | pdtn_qty_est
2         |  002  |  200
3         |  003  |  100

我想要的输出：

 pd_id| pd_name| inv_qty_act|pdtn_qty_est| Sum(res_qty)| Total[(inv_qty_est) - Sum(res_qty)]
  001 | des1   |    120     |   0        |   520       |     -400 -->(120-520)
  002 | des2   |     0      |   200      |   446       |     -446 -->(0-446)
  003 | des3   |    387     |   100      |     0       |      387

Answer 1

这是怎么回事？

SELECT
    tbl_product.pd_id,
    tbl_product.pd_name,
    ( SELECT Sum(inv_qty_act) FROM tbl_inventory AS t1
      WHERE t1.pd_id=tbl_product.pd_id) AS SumOfinv_qty_act,
    ( SELECT Sum(pdtn_qty_est) FROM tbl_pdtn_startup AS t2
      WHERE t2.pd_id =tbl_product.pd_id) AS SumOfpdtn_qty_est,
    ( SELECT Sum(res_qty) FROM tbl_reserve AS t3
      WHERE t3.pd_id=tbl_product.pd_id) AS SumOfres_qty,
    IIF(ISNULL([SumOfinv_qty_act]),0,[SumOfinv_qty_act])-
      IIF(ISNULL([SumOfres_qty]),0,[SumOfres_qty]) AS Total
FROM
    tbl_product;

Access SQL：如何从2个表中检索所有记录（无论它们在另一个表中没有记录）

1 个答案: