一尘不染

我是否需要递归CTE来更新依赖于自身的表?

sql

我需要为这个标题道歉。我花了很多心思,但没有走太远。

我有一个看起来像这样的表:

+--------------------------------------+--------------------------------------+--------------------------------------+--------------------------------------+--------+
|              accountid               |             pricexxxxxid             |              accountid               |             pricelevelid             | counts |
+--------------------------------------+--------------------------------------+--------------------------------------+--------------------------------------+--------+
| 36B077D4-E765-4C70-BE18-2ECA871420D3 | 00000000-0000-0000-0000-000000000000 | 36B077D4-E765-4C70-BE18-2ECA871420D3 | F43C47CE-28C6-42E2-8399-92C58ED4BA9D |      1 |
| EBC18CBC-2D2E-44CB-B36A-0ADE9E2BDE9F | 00000000-0000-0000-0000-000000000000 | EBC18CBC-2D2E-44CB-B36A-0ADE9E2BDE9F | 3BEEA9D3-F26B-47E4-88FA-A2AA366980ED |      1 |
| 8DC8D0FC-3138-425A-A922-2F0CAC57E887 | 00000000-0000-0000-0000-000000000000 | 8DC8D0FC-3138-425A-A922-2F0CAC57E887 | F1B8AD5D-B008-4C3F-94A0-AD3F90C777D7 |      1 |
| 8F908A92-1327-4655-BAE4-C890D971A554 | 00000000-0000-0000-0000-000000000000 | 8F908A92-1327-4655-BAE4-C890D971A554 | 2E0EC67E-5F8F-4305-932E-BBF8DF83DBEC |      1 |
| 37221AAC-B885-4002-B7D9-591F8C14D019 | 00000000-0000-0000-0000-000000000000 | 37221AAC-B885-4002-B7D9-591F8C14D019 | F4A2A0CA-FDFF-4C21-AE92-D4583DC18DED |      1 |
| 66F406B4-0D9B-40B8-9A23-119EE74B00B7 | 00000000-0000-0000-0000-000000000000 | 66F406B4-0D9B-40B8-9A23-119EE74B00B7 | 204B8570-CEBA-4C72-9B72-8B9B14AF625E |      2 |
| D0168CE3-479E-439E-967C-4FF0D701291A | 00000000-0000-0000-0000-000000000000 | D0168CE3-479E-439E-967C-4FF0D701291A | 204B8570-CEBA-4C72-9B72-8B9B14AF625E |      2 |
| 57E5F6E5-0A8A-4E54-B793-2F6493DC1EA3 | 00000000-0000-0000-0000-000000000000 | 57E5F6E5-0A8A-4E54-B793-2F6493DC1EA3 | 893F9FD2-43C9-4355-AEFC-08A62BF2B066 |      3 |
+--------------------------------------+--------------------------------------+--------------------------------------+--------------------------------------+--------+

按升序排序

我想用其对应的pricelevelid更新全部为00000000-0000-0000-0000-0000-000000000000的pricexxxxid。

例如,对于accountid = 36B077D4-E765-4C70-BE18-2ECA871420D3, 我希望pricexxxxid为
F43C47CE-28C6-42E2-8399-92C58ED4BA9D。

完成此操作后,我希望删除此帐户之后的所有记录,其中accountid = 36B077D4-E765-4C70-BE18-2ECA871420D3

换句话说,我将得到一个唯一的价格为pricexxxxid的帐户ID列表,并为其分配来自pricelevelid的相应值。

非常感谢您的指导。


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2021-05-30

共1个答案

一尘不染

对于您的第一种情况!

update table
set pricexxxxids=pricelevelid.

如果我正确理解您的第二种情况:(删除重复项/选择不重复项)?

delete from
(
select *,rn=row_number()over(partition by accountid order by accountid) from table
)x
where rn>1


--select distinct * from table

已编辑

select * from
(
select *,rn=row_number()over(partition by accountid order by accountid) from table
)x
where x.rn=1

更新

  SELECT accountid,pricelevelid FROM  
    (
    (SELECT *,
    Row_number() OVER ( partition BY accountid ORDER BY counts, pricelevelid ) AS Recency 
    FROM table
    )x 
   WHERE x.Recency = 1
2021-05-30