sql server - SQL UPDATE statement combining multiple rows into one column -

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i'm working airline data, have query this

select invoices.pnr, segments.depart, segments.arrival, segments.departdatetime invoices inner join segments s on i.invoice_id = s.invoice_id` pnr = 'aaaaaa'

this returns

pnr    depart arrival departdatetime aaaaaa dfw    mci     7/2/2012 7:30 aaaaaa mci    lax     7/2/2012 11:30 aaaaaa lax    dfw     7/4/2012 2:30 pm

i have column in invoices called routing want show 'dfw-mci-lax-dfw' possible using sql method ? segments listed in order, dfw-mci first mci-lax lax-dfw.

edit: if update database dfw-mci-mci-lax-lax-dfw acceptable. can strip out duplicate entries on view layer.

i can write in coldfusion, looping , thousands of database updates takes forever. mass update every 100 records, i'd avoid using other sql altogether

here's how can value. agree @automatic whether should update database data. since have recalculate every time of rows change.

;with x  (   select i.pnr, i.invoice_id, s.depart, s.arrival, s.departdatetime,      rn = row_number() on (partition i.pnr order s.departdatetime)   dbo.invoices    inner join dbo.segments s   on i.invoice_id = s.invoice_id   i.pnr = 'aaaaaa' ) select x.pnr, x.invoice_id, routing = (select      case when rn1 = 1 depart else '' end      + '-' + arrival      x x2     x.pnr = x2.pnr     , x.invoice_id = x2.invoice_id     order x2.departdatetime     xml path('') ) x group x.pnr, x.invoice_id;

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