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select * from todaytask where datediff("n",taskonlinetime,getdate()) <15 order by rank asc,addtasktime desc

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SQL code:
select
case rank when 0 then (select * from todaytask where datediff("n",taskonlinetime,getdate()) <15 order by rank asc,addtasktime desc)
else (select * from todaytask order by rank asc,addtasktime desc)
from
todaytask


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SQL codeselectcase rankwhen0then (select*from todaytaskwheredatediff("n",taskonlinetime,getdate()) <15orderby rankasc,addtasktimedesc)else (select*from todaytaskorderby rankasc,addtasktimedesc)from 
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