汇总重叠数据

我有一个名为dbo.StayData的表。在这个表中有4列GuestID，StayID，CheckIn，CheckOut。我正在尝试编写一个报告，该报告将返回3列GuestID，CheckIN，CheckOut。但是，如果某个客人的重叠状态如CheckOuton与在不同行中的CheckIn相同，或者一行中的CheckIn位于不同条目的CheckIn和CheckOut之间，我想将它们合并为一个条目，这样我就可以更好地了解何时发生全程旅行。下面我有一个左侧数据样本和右侧所需结果的样本。我愿意接受所有想法。我曾考虑尝试制作临时表，但我不确定如何到达我想要的位置。汇总重叠数据

我认为这个问题应该能够回答我的问题，但我不太了解代码。 SQL - Consolidate Overlapping Data

我在上面的问题中使用了答案中的代码，并且能够在临时表中查看1个访客时使其工作正常。不过，我试图修改该代码来查看整个dbo.StayData表，它具有100k行和10k的GuestID's。下面是我修改后想出来的。

with temp_positions as --Select all limits as a single column along with the start/end flag (s/e) 
(
    select GuestID,CheckIn as limit, 's' as pos from dbo.StayData 
    union 
    select GuestID,CheckOut as limit, 'e' as pos from dbo.StayData 
) 
, ordered_positions as --Rank all limits 
(
    select GuestID,limit, pos, RANK() OVER (ORDER BY GuestID,limit) AS Rank 
    from temp_positions 
) 
, collapsed_positions as --Collapse ranges (select the first limit, if s is preceded or followed by e, and the last limit) and rank limits again 
(
    select op1.*, RANK() OVER (ORDER BY Op1.GuestID,op1.Rank) AS New_Rank 
    from ordered_positions op1 
    inner join ordered_positions op2 
    on (op1.Rank = op2.Rank and op1.Rank = 1 and op1.pos = 's') 
    or (op2.Rank = op1.Rank-1 and op2.pos = 'e' and op1.pos = 's') 
    or (op2.Rank = op1.Rank+1 and op2.pos = 's' and op1.pos = 'e') 
    or (op2.Rank = op1.Rank and op1.pos = 'e' and op1.Rank = (select max(Rank) from ordered_positions)) 
) 
, final_positions as --Now each s is followed by e. So, select s limits and corresponding e limits. Rank ranges 
(
    select Cp1.GuestID,cp1.limit as cp1_limit, cp2.limit as cp2_limit, RANK() OVER (ORDER BY cp1.GuestID, cp1.limit) AS Final_Rank 
    from collapsed_positions cp1 
    inner join collapsed_positions cp2 
    on cp1.pos = 's' and cp2.New_Rank = cp1.New_Rank+1 
) 
--Finally, subtract 1 from Rank to start Range #'s from 0 
select fp.GuestID, fp.Final_Rank-1 seq_no, fp.cp1_limit as starty, fp.cp2_limit as endy 
from final_positions fp;

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2017-06-21 Chad Portman

所以下面是我现在使用的最终代码似乎工作。我将Subquery移动到了折叠位置部分的一个连接上，我还添加了与最终选择不同的部分。

with temp_positions as --Select all limits as a single column along with the start/end flag (s/e) 
(
    select GuestID,CheckIn as limit, 's' as pos from dbo.StayData 
    union 
    select GuestID,CheckOut as limit, 'e' as pos from dbo.StayData 
) 
, ordered_positions as --Rank all limits 
(
    select GuestID,limit, pos, RANK() OVER (ORDER BY GuestID,limit) AS Rank 
    from temp_positions 
) 
, collapsed_positions as --Collapse ranges (select the first limit, if s is preceded or followed by e, and the last limit) and rank limits again 
(
    select op1.*, RANK() OVER (ORDER BY Op1.GuestID,op1.Rank) AS New_Rank 
    from ordered_positions op1 
    Left Join (Select GuestID, Max(Rank) as Rank from Ordered_Positions Group by GuestID) as OP 
    on OP1.Rank = OP.Rank 

    inner join ordered_positions op2 
    on (op1.Rank = op2.Rank and op1.Rank = 1 and op1.pos = 's') 
    or (op2.Rank = op1.Rank-1 and op2.pos = 'e' and op1.pos = 's') 
    or (op2.Rank = op1.Rank+1 and op2.pos = 's' and op1.pos = 'e') 
    or (op2.Rank = op1.Rank and op1.pos = 'e' and op1.Rank = OP.Rank) 
) 
, final_positions as --Now each s is followed by e. So, select s limits and corresponding e limits. Rank ranges 
(
    select Cp1.GuestID,cp1.limit as cp1_limit, cp2.limit as cp2_limit, RANK() OVER (ORDER BY cp1.GuestID, cp1.limit) AS Final_Rank 
    from collapsed_positions cp1 
    inner join collapsed_positions cp2 
    on cp1.pos = 's' and cp2.New_Rank = cp1.New_Rank+1 
) 
--Finally, subtract 1 from Rank to start Range #'s from 0 
select distinct fp.GuestID, fp.Final_Rank-1 seq_no, fp.cp1_limit as starty, fp.cp2_limit as endy 
from final_positions fp;

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2017-06-21 19:52:18

汇总重叠数据

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