长时间列表，第一次来电。我正在使用Crystal Reports 2010。
如果音量没有变化，我有每日交易信息需要组合在一起。这是数据的样子。
1 1/1/2012 1/2/2012 500
1 1/2/2012 1/3/2012 500
1 1/3/2012 1/4/2012 1000
1 1/4/2012 1/5/2012 750
1 1/5/2012 1/6/2012 750
1 1/6/2012 1/7/2012 500
1 1/7/2012 1/8/2012 500
1 1/8/2012 1/9/2012 500
我需要它看起来像这样。
1 1/1/2012 - 1/3/2012 500
1 1/3/2012 - 1/4/2012 1000
1 1/4/2012 - 1/6/2012 750
1 1/6/2012 - 1/9/2012 500
我需要按派生日期范围进行分组，但我不确定如何使用Crystal完成此操作。任何想法??
答案 0 :(得分：4)
with w as (
select 1 id, to_date('1/1/2012', 'mm/dd/yyyy') start_date, to_date('1/2/2012', 'mm/dd/yyyy') end_date, 500 sales_volume from dual
union all
select 1, to_date('1/2/2012', 'mm/dd/yyyy'), to_date('1/3/2012', 'mm/dd/yyyy'), 500 from dual
union all
select 1, to_date('1/3/2012', 'mm/dd/yyyy'), to_date('1/4/2012', 'mm/dd/yyyy'), 1000 from dual
union all
select 1, to_date('1/4/2012', 'mm/dd/yyyy'), to_date('1/5/2012', 'mm/dd/yyyy'), 750 from dual
union all
select 1, to_date('1/5/2012', 'mm/dd/yyyy'), to_date('1/6/2012', 'mm/dd/yyyy'), 750 from dual
union all
select 1, to_date('1/6/2012', 'mm/dd/yyyy'), to_date('1/7/2012', 'mm/dd/yyyy'), 500 from dual
union all
select 1, to_date('1/7/2012', 'mm/dd/yyyy'), to_date('1/8/2012', 'mm/dd/yyyy'), 500 from dual
union all
select 1, to_date('1/8/2012', 'mm/dd/yyyy'), to_date('1/9/2012', 'mm/dd/yyyy'), 500 from dual
)
,t as (select sales_volume
,start_date
,end_date
,lag (sales_volume,1) over (order by start_date) prev_sales_volume
from w
order by start_date)
,u as (select *
from t
where nvl(prev_sales_volume,-1) != sales_volume
order by start_date)
select start_date
,nvl(lead (start_date,1) over (order by start_date),(select max(end_date) from w)) end_date
,sales_volume
from u
order by start_date
答案 1 :(得分：1)
我使用“X-2”抑制功能来隐藏除每行之外的所有行，而使用Previous（）和Next（）来查找端点。
BegDate集团;抑制细节和组页脚部分。
在组标题
中的某处创建一个{@UpdateCurrentBegDate}函数WhilePrintingRecords;
Global DateVar CurrentBegDate;
If PreviousIsNull({table.Volume}) or Previous({table.Volume}) <> {table.Volume}
Then ( //We found a new range
CurrentBegDate = {table.BegDate};
);
""; //Display nothing on screen
还有一个{@DisplayBegDate}函数，您当前正在显示BegDate
EvaluateAfter({@UpdateCurrentBegDate});
Global DateVar CurrentBegDate;
转到Section Expert并单击Suppress选项旁边的“X-2”（对于组标题部分）。这是那里的公式
Not(NextIsNull({table.Volume}) or Next({table.Volume}) <> {table.Volume})
如果您需要进行总计或其他计算，您可以在{@UpdateCurrentBegDate}函数中执行此操作（并且您希望将名称更改为{@UpdateCurrentValues}或类似的名称）。如果您只想在组更改时更改内容，您还可以创建一个检查Next（）信息的新函数 - 使用默认的总计函数将包含隐藏值。
答案 2 :(得分：0)
with w as (
select 1 id, to_date('1/1/2012', 'mm/dd/yyyy') db, to_date('1/2/2012', 'mm/dd/yyyy') de, 500 s from dual
union all
select 1, to_date('1/2/2012', 'mm/dd/yyyy'), to_date('1/3/2012', 'mm/dd/yyyy'), 500 from dual
union all
select 1, to_date('1/3/2012', 'mm/dd/yyyy'), to_date('1/4/2012', 'mm/dd/yyyy'), 1000 from dual
union all
select 1, to_date('1/4/2012', 'mm/dd/yyyy'), to_date('1/5/2012', 'mm/dd/yyyy'), 750 from dual
union all
select 1, to_date('1/5/2012', 'mm/dd/yyyy'), to_date('1/6/2012', 'mm/dd/yyyy'), 750 from dual
union all
select 1, to_date('1/6/2012', 'mm/dd/yyyy'), to_date('1/7/2012', 'mm/dd/yyyy'), 500 from dual
union all
select 1, to_date('1/7/2012', 'mm/dd/yyyy'), to_date('1/8/2012', 'mm/dd/yyyy'), 500 from dual
union all
select 1, to_date('1/8/2012', 'mm/dd/yyyy'), to_date('1/9/2012', 'mm/dd/yyyy'), 510 from dual
)
select tmin.db, tmax.de, tmin.s
from
(
select
row_number() over (order by db) id,
db,
s
from
(
select
db,
s,
case
when ps is null
then 1
when ps != s
then row_number() over (order by db)
else 0 end num
from (
select
(db)
, (de)
, lag (s,1) over (ORDER BY db) ps
, s
from w
) t
) t1
where num != 0
) tmin,
(select
row_number() over (order by db) id,
de,
s
from
(
select
db,
de,
s,
case
when ps is null
then 1
when ps != s
then row_number() over (order by de desc)
else 0 end num
from (
select
db
,(de)
, lag (s,1) over (ORDER BY de desc) ps
, s
from w
order by db
) t
) t1
where num != 0) tmax
where tmin.id = tmax.id
答案 3 :(得分：0)
这是我能提出的最优雅的解决方案
WITH DirectTrades(tradeid, SourceDate, EndDate, Volume, Row, KillRow, Depth) AS
(
SELECT tradeid
BegDate AS SourceDate,
EndDate,
Volume,
ROW_NUMBER() over (partition by Table# order by BegDate) AS Row,
ROW_NUMBER() over (partition by Table# order by BegDate) AS KillRow,
0 AS Depth
FROM Trade
UNION ALL
SELECT t1.Tradeid
dt.SourceDate,
t1.EndDate,
t1.Volume,
dt.Row,
dt.Row + dt.Depth + 1,
dt.Depth + 1
FROM Trade AS t1
INNER JOIN
DirectTrades AS dt ON
t1.BegDate=dt.EndDate AND
t1.Volume=dt.Volume AND
t1.tradeid=dt.Tradeid
)
SELECT dt1.Tradeid
dt1.SourceDate,
dt1.EndDate,
dt1.Volume
FROM DirectTrades dt1
INNER JOIN
(
SELECT dt2.Row,
MAX(dt2.KillRow) AS KillRow
FROM DirectTrades dt2
WHERE dt2.Row NOT IN
(
SELECT dt3.KillRow
FROM DirectTrades dt3
WHERE dt3.Depth <> 0
)
GROUP BY dt2.Row
) dt4 ON dt1.Row=dt4.Row AND dt1.KillRow=dt4.KillRow
ORDER BY SourceDate