sql server - SQL Query Logic -


i have 2 table

1)activitymaster

activityid ,activitydesc,registereddate

2)approvalconfig

approvalid,userid,activityid,approvaldate

both table have activityid in common .

once activity registered in activitymaster re-occurs after 30 days

1)activity should visible user after 30 days , after approval should not appear until next approval date comes (i.e 30 days)

i using below query logic not working expected.

select  case   when  dateadd(dd,datediff(month, registereddate,getdate()) *30,registereddate) < (select isnull(max(approvaldate),0) approvalconfig c c.activityid= activityid)  0 -- hide approval link else 1 -- show approval link end linkshow  activitymaster

e.g user register activity on 5 jan 2017 , visible next user approval after every 30 days .

1)activity visible next user on 6 feb 2017 , 6 march 2017 respectively

2)once activity approved not shown in dashboard.i.e if user approved on 7 feb 2017 activity not visible until next approval date comes i.e 6 march 2017


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