Курсовая работа: Информационная система военного округа

where t.[tip_i_nomer_obedinenia] = d.[tip_i_nomer_obedinenia] and

t.[Nomer_podrazdelenia] = d.[Nomer_podrazdelenia] and

t.[nazvanie_armii] = d.[nazvanie_armii])

begin

raiserror 50001 'Children still exist in table ''Chast''. Cannot update parent table ''Obedinenie''.'

rollback transaction

return

end

end

end

go

/* Update trigger "tu_armia" for table "armia" */

Create trigger [tu_armia]

on [armia] for update as

begin

declare @numrows int

select @numrows = @@rowcount

if @numrows = 0

return

/* Restrict child "Obedinenie" when parent "armia" updated */

if update([nazvanie_armii]) or

update([Nomer_podrazdelenia])

begin

if exists (select 1 from [Obedinenie] t, deleted d

where t.[nazvanie_armii] = d.[nazvanie_armii] and

t.[Nomer_podrazdelenia] = d.[Nomer_podrazdelenia])

begin

raiserror 50001 'Children still exist in table ''Obedinenie''. Cannot update parent table ''armia''.'

rollback transaction