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Editorial Team
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Asked: 2026-06-12T00:53:09+00:00

How would I select c_user_id who have made back to back entries in a

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How would I select c_user_id who have made back to back entries in a SQL Server 2008 database ?

Preferably people who have made more than 3 back to back entries like pras.chla@gmail.com below (sorting by c_id desc and c_id is an identity column)

c_id    c_user_id             c_entry
1427    xermadr.asdf@me.com   155575
1426    pras.chla@gmail.com   155829
1425    pras.chla@gmail.com   155826
1424    pras.chla@gmail.com   155828
1423    pras.chla@gmail.com   155830
1422    sdfe.qqol@gmail.com   155559

thanks again ?

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1 Answer

  1. Editorial Team
    ;WITH someUserTableWithOrderNumber as
(
SELECT ROW_NUMBER ( )  OVER (order by c_id) OrderNumber, 
    c_id, 
    c_user_id, 
    c_entry 
FROM someUserTable
)
SELECT DISTINCT a.c_user_id
FROM someUserTableWithOrderNumber a
JOIN someUserTableWithOrderNumber b on a.OrderNumber = b.OrderNumber + 1 AND a.c_user_id = b.c_user_id 
JOIN someUserTableWithOrderNumber c on b.OrderNumber = c.OrderNumber + 1 AND b.c_user_id = c.c_user_id 
JOIN someUserTableWithOrderNumber d on c.OrderNumber = d.OrderNumber + 1 AND c.c_user_id = d.c_user_id
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