c# - How would I make an sql MVC query pertaining to 3 tables with if and @@ logic? -


i using entity framework , asp.net mvc 4. tables set this

computer table----- 

[key]   (int) computerid    (string) computername   (string) department

ticket table---- 

[key]   (int) ticketid [foreign key]   (int) computerid   (datetime) downtimestamp   (int) runningstatus

update ticket table--- 

[key]   (int) updateid   [foreign key]   (int) ticketid   (datetime) updatetimestamp

when ticket created, ticket running status set 1, computer down

i update tickets running status every time there update radio buttons, 2 computer restarted, 3 waiting parts , 4 maintenance on site.

i have index view of current tickets refreshes every minute, displaying computers down.

i have query joins 3 tables, question is, how make query includes of tickets have condition if running status set 2, keep ticket 2 minutes after update timestamp.

i think query need this:

var tickets = _db.tickets  .where(x => !(x.runningstatus == 2 &&                 datetime.now.subtract(t.downtimestamp).seconds >= 2 *60));

if isn't want, please give example or describe question in more detail.


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