sql server - TSQL decision statement -


i have view select number of fields can see. main focus of query though xro_roles.start_page. field holds start page link stored procedure reference. have second table holds links (this table called branches). if dbo.people.role_id = 1 need use branches table start_page column. if role_id not 1 should reference xro_roles.start_page.

i not sure how use case statement in scenario. if not giving enough information let me know.

thanks

 select dbo.people.people_id, dbo.people.role_id, dbo.people.company_id,             dbo.xro_roles.start_page, dbo.areas.area_id, dbo.areas right outer join           dbo.divisions on dbo.areas.area_id = dbo.divisions.area_id right outer join           dbo.people left outer join           dbo.xro_roles on dbo.people.role_id = dbo.xro_roles.role_id on dbo.divisions.division_id = dbo.people.division_id left outer join           dbo.companies on dbo.people.company_id = dbo.companies.company_id left outer join           dbo.xro_time_zones on dbo.people.time_zone_id = dbo.xro_time_zones.time_zone_id           left outer join dbo.branches on dbo.branches.branch_id = dbo.people.division_id (dbo.people.status_id in (0, 1, 4))

put case when in select portion of query:

select  dbo.people.people_id         , dbo.people.role_id         , dbo.people.company_id         , case when dbo.people.role_id = 1                dbo.branches.start_page     -- assuming column name "start_page"             else    dbo.xro_roles.start_page           end some_field_name         , dbo.areas.area_id    dbo.areas         right outer join dbo.divisions             on  dbo.areas.area_id = dbo.divisions.area_id         right outer join dbo.people             on  dbo.divisions.division_id = dbo.people.division_id               left outer join dbo.xro_roles             on  dbo.people.role_id = dbo.xro_roles.role_id         left outer join dbo.companies             on  dbo.people.company_id = dbo.companies.company_id         left outer join dbo.xro_time_zones             on  dbo.people.time_zone_id = dbo.xro_time_zones.time_zone_id         left outer join dbo.branches             on  dbo.branches.branch_id = dbo.people.division_id   dbo.people.status_id in (0, 1, 4)

you use coalesce instead of case when depending on how set joins, although may not give desired results if dbo.people.status_id not 1 in other cases:

select  dbo.people.people_id         , dbo.people.role_id         , dbo.people.company_id         , coalesce(dbo.branches.start_page, dbo.xro_roles.start_page) some_field_name         , dbo.areas.area_id    dbo.areas         right outer join dbo.divisions             on  dbo.areas.area_id = dbo.divisions.area_id         right outer join dbo.people             on  dbo.divisions.division_id = dbo.people.division_id               left outer join dbo.xro_roles             on  dbo.people.role_id = dbo.xro_roles.role_id         left outer join dbo.companies             on  dbo.people.company_id = dbo.companies.company_id         left outer join dbo.xro_time_zones             on  dbo.people.time_zone_id = dbo.xro_time_zones.time_zone_id         left outer join dbo.branches             on  dbo.branches.branch_id = dbo.people.division_id             , dbo.people.status_id = 1    -- join may not want , included example.   dbo.people.status_id in (0, 1, 4)

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