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Editorial Team
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Asked: 2026-06-13T21:12:36+00:00

I have Table below. I like to Update ID according to date and then

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I have Table below.

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I like to Update ID according to date and then by User.

For Example

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Thanks

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1 Answer

  1. Editorial Team

    SQL Fiddle

    MS SQL Server 2008 Schema Setup:

    create table YourTable
(
  MYUser char(3),
  Date date,
  ID int
)

insert into YourTable(MYUser, Date) values
('U55', '2012-10-05'),
('U55', '2012-10-10'),
('U22', '2012-10-06'),
('U55', '2012-10-01'),
('U55', '2012-10-07'),
('U22', '2012-10-04'),
('U55', '2012-10-09'),
('U22', '2012-10-02'),
('U22', '2012-10-03'),
('U55', '2012-10-08')

    Query 1:

    update T 
set ID = rn
from
  (
    select ID,
           row_number() over(partition by MYUser order by Date) as rn
    from YourTable
  ) as T


select *
from YourTable

    Results:

    | MYUSER |       DATE | ID |
----------------------------
|    U55 | 2012-10-05 |  2 |
|    U55 | 2012-10-10 |  6 |
|    U22 | 2012-10-06 |  4 |
|    U55 | 2012-10-01 |  1 |
|    U55 | 2012-10-07 |  3 |
|    U22 | 2012-10-04 |  3 |
|    U55 | 2012-10-09 |  5 |
|    U22 | 2012-10-02 |  1 |
|    U22 | 2012-10-03 |  2 |
|    U55 | 2012-10-08 |  4 |
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