Question

尝试从另一个具有最高日期的表中更新一列。

Table 1示例：

PartNumber | Cost 
1000       | .10
1001       | .20

Table 2示例：

PartNumber | Cost | Date
1000       | .10  | 2017-01-01
1000       | .50  | 2017-02-01
1001       | .20  | 2017-01-01
1002       | .50  | 2017-02-02

我想用table2中的最新值更新表1，每个值为.50 ...我用来更新这个的查询工作得很好，直到我意识到我没有抓住正确的成本，因为有倍数......我现在想要获得最高版本的修订。

我的查询：

  UPDATE dex_mfgx..insp_master
  SET dex_mfgx..insp_master.costperpart = t2.sct_cst_tot
  FROM dex_mfgx..insp_master AS t1
  INNER JOIN qad_repl..sct_det_sql AS t2
  ON t1.partnum = t2.sct_part
  WHERE t1.partnum = t2.sct_part and t2.sct_cst_date = MAX(t2.sct_cst_date) ;

我的错误：

Msg 147, Level 15, State 1, Line 6
An aggregate may not appear in the WHERE clause unless it is in a subquery contained in a HAVING clause or a select list, and the column being aggregated is an outer reference.

HAVING或GROUPING没有太多运气，虽然我没有多用它们。

任何想法都有帮助吗？

Answer 1

我想我明白你现在要解决的问题。感谢Lamak让我直截了当，因为我最初离开了基地。

我想这就是你想要的东西。

with TotalCosts as
(
    SELECT t2.sct_cst_tot
        , t1.partnum
        , RowNum = ROW_NUMBER() over(partition by t1.partnun order by t2.sct_cst_date desc)
    FROM dex_mfgx..insp_master AS t1
    INNER JOIN qad_repl..sct_det_sql AS t2 ON t1.partnum = t2.sct_part
)

update t1
set costperpart = tc.sct_cst_tot
from dex_mfgx..insp_master AS t1
join TotalCosts tc on tc.partnum = t1.partnum
where tc.RowNum = 1

使用wheres从另一个表更新1个表

1 个答案: