c# - How can i update header table Status as Closed comparing with detail table Status in SQL -


header table:

headeid   status ---------------- 1          open

detail table:

detailid headerid status ------------------------- 1            1      close 2            1      close

sql server allows use of triggers. in simple terms, trigger stored procedure executes on update of table. typically use triggers enforce business rules/logic.

therefore apply situation place trigger on details table, check if rows current headerid have been set closed update header table.

create trigger detail_update_header on detail after insert, update begin set nocount on;  declare @currentheaderid int;  select @currentheaderid = i.headeid inserted i;  if((select count(*) detail headerid = @currentheaderid) > (select count(*) detail headerid = @currentheaderid , status = 'closed')) begin     update header      set status = 'closed'; end end go

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