sql server - Query to transform unknown number of rows to unknown number of columns -


i'm been looking hours @ different options (pivot, cross join etc...) transform unknown number of rows unknown number of columns sql server 2008 , i'm more lost before started.

basically have 3 tables:

role

|id| name| | 1|role1| | 2|role2| | 3|role3|

action

|id|  name | | 1|action1| | 2|action2| | 3|action3|

roleaction

|roleid| actionid| |   1  |    1    | |   1  |    2    | |   2  |    1    | |   3  |    2    |

is there anyway build query or sp transform result of left join nice "pivot" table this:

|actionid|actionname|role1|role2|role3|.....|role n| |   1    | action1  |  1  |  1  |  0  |.....|   0  | |   2    | action2  |  1  |  0  |  1  |.....|   0  | |   3    | action3  |  0  |  0  |  0  |.....|   0  | |   .    |    .     |  .  |  .  |  .  |.....|   .  | |   .    |    .     |  .  |  .  |  .  |.....|   .  | |   n    | action n |  0  |  0  |  0  |.....|   0  |

many many help!

big thank aaron putting me on right track!

alter procedure dbo.roleactionspivot  set nocount on  declare @cols nvarchar(max), @query  nvarchar(max);  select  action.actionid, action.actionname , role.roleid, role.rolename    #tmproleaction    action left join roleactions on action.actionid = roleaction.actionid      left join role on roleaction.roleid = role.roleid  set @cols = stuff((select distinct ',' + quotename(rolename)              #tmproleaction             xml path(''), type             ).value('.', 'nvarchar(max)')          ,1,1,'')  set @query = 'select actionid, actionname, ' + @cols + '      (select * #tmproleaction) x      pivot  ( max(roleid) rolename in (' + @cols + ')) p '   execute(@query)

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