Курсовая работа: Информационная система военного округа

begin

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

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

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

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

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

t.[Mesto] = d.[Mesto])

begin

raiserror 50001 'Children still exist in table ''Vzvod''. Cannot update parent table ''Rota''.'

rollback transaction

return

end

end

end

go

/* Update trigger "tu_Vzvod" for table "Vzvod" */

Create trigger [tu_Vzvod]

on [Vzvod] for update as

begin

declare @numrows int

select @numrows = @@rowcount

if @numrows = 0

return

/* Restrict child "Otdelenie" when parent "Vzvod" updated */

if update([Nazv_vzvoda]) or

update([Nomer_podrazdelenia]) or

update([nazvanie_armii]) or

update([tip_i_nomer_obedinenia]) or

update([Nazv_roti]) or