Do I need a recursive CTE to update a table that relies on itself?

Question

I need to apologize for the title. I thought a lot about it, but did not go too far.

I have a table that looks like this:

+--------------------------------------+--------------------------------------+--------------------------------------+--------------------------------------+--------+
|              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 |
+--------------------------------------+--------------------------------------+--------------------------------------+--------------------------------------+--------+

It is sorted ascending .

I would like to update pricexxxxids, which are 00000000-0000-0000-0000-000000000000 with their corresponding pricelevelid.

For example, for accountid = 36B077D4-E765-4C70-BE18-2ECA871420D3 I would like pricexxxxid to be F43C47CE-28C6-42E2-8399-92C58ED4BA9D.

After that, I would like all entries to FOLLOW this where accountid = 36B077D4-E765-4C70-BE18-2ECA871420D3 was deleted .

xxxxid, pricelevelid.

.

Answer 1

!

update table
set pricexxxxids=pricelevelid.

: ( / )?

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


--select distinct * from table

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

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