tsql - SQL Server SUM based on subsequent records -


microsoft sql server 2012 (sp1) - 11.0.3156.0 (x64)

i not sure of best way word , have tried few different searches different combinations of words without success.

i want sum sequence = 1 when there sequence > 1, in table below sequence = 1 lines marked *. don't care @ checking sequence 2,3,etc match same pattern because if exist @ need sum them.

i have data looks this:

| sequence | id | num | otherid | |----------|----|-----|---------| |        1 |  1 |  10 |       1 |* |        2 |  1 |  15 |       1 | |        3 |  1 |  20 |       1 | |        1 |  2 |  10 |       1 |* |        2 |  2 |  15 |       1 | |        1 |  3 |  10 |       1 | |        1 |  1 |  40 |       3 |

i need sum num column when there more 1 sequence. output this:

sequence    sum  otherid    1         20     1    2         30     1    3         20     1

i have tried grouping queries in bunch of different ways time sum, don't know how look ahead make sure there greater 1 sequences id.

my query @ moment looks this: 

select sequence, sum(num) [sum], otherid  tbl  id in (select id tbl sequence > 1) group sequence, otherid

tbl cte wrapped around query , partially works, not filter wanted.

if shouldn't done or can't done can handle that, if it's missing i'd fix query.

edit:

i can't give full query here started table/data (to above output). otherid there because data has same id/sequence combinations otherid helps separate them out rows not identical (multiple questions on form). 

create table #tmptable (id int, sequence int, num int, otherid int)    insert #tmptable (id, sequence, num, otherid) values (1, 1, 10, 1)   insert #tmptable (id, sequence, num, otherid) values (1, 2, 15, 1)   insert #tmptable (id, sequence, num, otherid) values (1, 3, 20, 1)   insert #tmptable (id, sequence, num, otherid) values (2, 1, 10, 1)   insert #tmptable (id, sequence, num, otherid) values (2, 2, 15, 1)   insert #tmptable (id, sequence, num, otherid) values (3, 1, 10, 1)   insert #tmptable (id, sequence, num, otherid) values (1, 1, 40, 3)

the following sum on sequence , otherid, when: either

  • sequence greater 1

or

  • there else same id , otherid, different sequence.

query: 

select sequence, sum(num) sumnum, otherid @tmptable sequence > 1        or exists (select * @tmptable b                   a.id = b.id                     , a.otherid = b.otherid                     , b.sequence <> a.sequence) group sequence, otherid;

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