Comments on: SQL Puzzle: SQL Advance Query – Replace Previous Date if difference is only for One Day

By: Ram

Ram — Fri, 17 Aug 2018 19:19:16 +0000

select B1.Id,
B1.BillCode,
B1.EndBilllDate,
case when B2.EndBilllDate=DAteAdd(day,1,B1.EndBilllDate)
Then DateADD(day,1,B1.EndBilllDate)
else B1.EndBilllDate
end NewEndBilllDate
From BillDates b1 left outer join BillDates b2
on b1.Id +1 = B2.ID

By: Dinesh.IS

Dinesh.IS — Thu, 12 Oct 2017 07:53:51 +0000

—Above 2012 SQL Server Version
;
WITH CTE
As
(Select B.*,Lead(EndBilllDate)Over(Order By EndBilllDate) As NextEndBillDate From BillDates B )
Select ID,BillCode,EndBilllDate,(Case When DateDiff(Day,EndBilllDate,NextEndBillDate)=1 Then NextEndBillDate Else EndBillldate End) As NextEndBillDate
From CTE

By: Dinesh.IS

Dinesh.IS — Thu, 12 Oct 2017 07:53:13 +0000

—Method-1
;
WITH CTE
As
(Select *,(Select Top 1 Max(EndBilllDate) From BillDates B Where B.EndBilllDate>A.EndBilllDate Group By EndBilllDate Order By EndBilllDate ASC) As NextBillDate
From BillDates A )
Select ID,BillCode,EndBilllDate,(Case When DateDiff(Day,EndBilllDate,NextBillDate)=1 Then NextBillDate Else EndBilllDate End) As NextBillDate
From CTE