sql server 2008 - Multi- part identifier "" could not be bound -


i hope can new sql server pleaes patient. i'm trying set variable case statement hitting mulit-identifier error. code trying parse value variable depending on date variables being within date ranges of 2 date fields.

use kssdb  declare @datefrom   datetime,     @dateto     datetime,     @resint     int,     @progid     int,     @persid     int   set @datefrom = '2010/11/01' set @dateto = '2013/11/01' set @progid = 63 set @persid = 4492  --select pt.prog_id,  --      pt.pers_id,  --      p.prog_name, --      format(pt.prog_trai_sd, 'dd/mm/yyyy') prog_trai_sd,  --      format(pt.prog_trai_ed, 'dd/mm/yyyy')as prog_trai_ed,  set @resint =   case when (@datefrom > pt.prog_trai_sd , @dateto < pt.prog_trai_ed) 1     when (@datefrom > pt.prog_trai_ed , @dateto > pt.prog_trai_ed) 2      when (@datefrom < pt.prog_trai_sd , @dateto > pt.prog_trai_ed) 3      else  0     end  select @resint     prog p     join prog_trai pt on p.prog_id = pt.prog_id    pt.prog_id = @progid ,      pt.pers_id = @persid

the problem case statement separate select ... from , attempting set @resint using data in table.

try using this:

select @resint    = case when (@datefrom > pt.prog_trai_sd , @dateto < pt.prog_trai_ed) 1          when (@datefrom > pt.prog_trai_ed , @dateto > pt.prog_trai_ed) 2           when (@datefrom < pt.prog_trai_sd , @dateto > pt.prog_trai_ed) 3           else  0     end prog p join prog_trai pt    on p.prog_id = pt.prog_id pt.prog_id = @progid ,      pt.pers_id = @persid

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