sql server - SQL: Trying to understand IF/ELSE -

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select case r.sourceid                         when '1' 'itunes'                          when '2' 'sfr'                         when '3' 'orange'                          else 'others'                         end source  , cast(sum (r.salesvolume) decimal(14, 4) ) volume , cast(sum (r.salesvolume * r.customerprice) decimal(14, 4) ) value  rawdata r      inner join product p         on p.productid = r.productid     inner join calendar c          on r.dayid = c.dayid         c.weekid between (20145227) , (20155230)         , p.contentflavor in ('sd', 'hd')         , p.vodest in ('vod','est')         , p.distributor in ('m6snd')         group  case r.sourceid             when '1' 'itunes'              when '2' 'sfr'             when '3' 'orange'              else 'others'             end

the result of above query is:

source  volume      value itunes  48316.0000  506067.2600

this result ok since source table rawdata doesnt contain values sourceid 2 or 3. want result is:

source  volume      value itunes  48316.0000  506067.2600 sfr     0           0 orange  0           0 others  0           0

if there no value corresponding column parameter need 0 assume done using if/else not sure how?

with of cte way it. (replace first query more dynamic if want)

with mychoices (choices) (     select         choices     (         values         ('itunes'),         ('sfr'),         ('orange'),         ('others')     ) [ ] (choices) ), myquery ([source],[volume],[value]) (     select case r.sourceid                         when '1' 'itunes'                          when '2' 'sfr'                         when '3' 'orange'                          else 'others'                         end source      , cast(sum (r.salesvolume) decimal(14, 4) ) volume     , cast(sum (r.salesvolume * r.customerprice) decimal(14, 4) ) value      rawdata r      inner join product p         on p.productid = r.productid     inner join calendar c          on r.dayid = c.dayid         c.weekid between (20145227) , (20155230)         , p.contentflavor in ('sd', 'hd')         , p.vodest in ('vod','est')         , p.distributor in ('m6snd')         group  case r.sourceid             when '1' 'itunes'              when '2' 'sfr'             when '3' 'orange'              else 'others'             end ) select     c.choices,     isnull(q.volume,0)volume,     isnull(q.value,0)value mychoices c  left join myquery q on     c.choices = q.[source]

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