我知道我可以将上一行/下一行与/^'|'$|'(?=,)|(?<=,)'/ # regex used for removing single quote
^' # quote found at start
'$ # quote found at end
'(?=,) # lookahead, quote followed by a comma
(?<=,)' # lookbehind, quote preceded by a comma
和LAG进行比较，但在我正在进行的比较中;我需要能够偶尔跳过行（但仍需要确认它们）
具体细节：我正在尝试跟踪咨询，以及呼叫环境中的冷热转移。每个呼叫都有一个唯一的密钥，每个阶段都有一个递增的员工编号。它还包含每个呼叫段的开始和结束时间 咨询被定义为在前一个非咨询段结束之前开始和结束的呼叫 热转印是指前一个分段的末尾在前一个分段开始之后，在前一个分段结束之后结束的转移。 冷转移是在上一个分段结束后开始的分段。
示例数据：
topcallid e_created e_terminated empnum EG995GIFM 16:22:40.933 16:29:51.010 1 EG995GIFM 16:25:59.827 16:27:49.027 2 EG995GIFM 16:30:07.453 16:37:44.500 3 EG995GIFM 16:38:01.677 16:59:30.777 4 EG995GIFM 16:59:46.737 17:16:48.397 5 EG995GIFM 17:04:51.243 17:29:21.620 6
期望的输出：
LEAD当前代码，它将每个阶段与以下所有阶段进行比较：
topcallid.......TransStatus
EG995GIFM Consult (Stage 1 To 2)
EG995GIFM Cold Transfer (Stage 1 To 3)
EG995GIFM Cold Transfer (Stage 3 To 4)
EG995GIFM Cold Transfer (Stage 4 To 5)
EG995GIFM Warm Transfer (Stage 5 To 6)
答案 0 :(得分：4)
您似乎需要一个子查询来与之前终止的呼叫进行比较。该逻辑假定终止时间对于每个呼叫id是唯一的。
select
t3.topcallid,
case when t3.e_created < t4.e_created and t3.e_terminated > t4.e_terminated then 'Consult (Stage ' + cast(t3.EmpNum as varchar(3)) + ' To ' + cast(t4.EmpNum as varchar(3)) + ')'
when t3.e_terminated < t4.e_created then 'Cold Transfer (Stage ' + cast(t3.EmpNum as varchar(3)) + ' To ' + cast(t4.EmpNum as varchar(3)) + ')'
when t3.e_terminated > t4.e_created then 'Warm Transfer (Stage ' + cast(t3.EmpNum as varchar(3)) + ' To ' + cast(t4.EmpNum as varchar(3)) + ')'
end TransStatus
from
[TransferTypeAnalysis] t3
INNER JOIN
(
select
t1.topcallid, t1.empnum, t1.e_created, t1.e_terminated, max(t2.e_terminated) previous_term_dt
FROM
[TransferTypeAnalysis] t1
left join [TransferTypeAnalysis] t2
on t1.topcallid=t2.topcallid and t1.empnum>t2.empnum
GROUP BY t1.topcallid, t1.empnum, t1.e_created, t1.e_terminated
) as t4 on t3.topcallid = t4.topcallid and t3.e_terminated = t4.previous_term_dt
答案 1 :(得分：2)
您还可以将MAX与OVER和ROWS BETWEEN UNBOUNDED PRECEDING AND 1 PRECEDING一起使用，以获取每行前任条目的最长终止时间。
如果您拥有每个条目的最大上次终止时间，则可以按照与当前代码相同的方式进行自我加入。
示例数据
DECLARE @TransferTypeAnalysis TABLE ( topcallid VARCHAR(20),e_created TIME,e_terminated TIME,empnum INT)
insert into @TransferTypeAnalysis
VALUES('EG995GIFM', '16:22:40.933', '16:29:51.010', 1),
('EG995GIFM', '16:25:59.827', '16:27:49.027', 2),
('EG995GIFM', '16:30:07.453', '16:37:44.500', 3),
('EG995GIFM', '16:38:01.677', '16:59:30.777', 4),
('EG995GIFM', '16:59:46.737', '17:16:48.397', 5),
('EG995GIFM', '17:04:51.243', '17:29:21.620', 6);
<强>查询
SELECT ta.topcallid,
CASE WHEN TA_Prev.e_created<TA.e_created and TA_Prev.e_terminated>TA.e_terminated THEN 'Consult'
WHEN TA_Prev.e_terminated<TA.e_created THEN 'Cold Transfer'
WHEN TA_Prev.e_terminated>TA.e_created THEN 'Warm Transfer'
END + ' (Stage '+ cast(TA_Prev.EmpNum AS VARCHAR(3)) + ' To ' + cast(TA.EmpNum AS VARCHAR(3)) + ')'TransStatus
FROM
(
SELECT *,MAX(e_terminated)OVER(PARTITION BY topcallid ORDER BY empnum ROWS BETWEEN UNBOUNDED PRECEDING AND 1 PRECEDING) as max_term
FROM @TransferTypeAnalysis
)TA
INNER JOIN @TransferTypeAnalysis TA_Prev
ON TA.topcallid = TA_Prev.topcallid AND TA.max_term = TA_Prev.e_terminated AND TA.empnum > TA_Prev.empnum
答案 2 :(得分：1)
好吧，我想我已经退缩了。
在您的加入条件中，将and ta.empnum<Trans.empnum更改为and ta.empnum+1=Trans.empnum
：d
我用来测试这个代码：
--CREATE TABLE #TMP (topcallid varchar(15), e_created time, e_terminated time, empnum int)
--INSERT INTO #TMP VALUES ('EG995GIFM', '16:22:40.933', '16:29:51.010', 1)
--INSERT INTO #TMP VALUES ('EG995GIFM', '16:25:59.827', '16:27:49.027', 2)
--INSERT INTO #TMP VALUES ('EG995GIFM', '16:30:07.453', '16:37:44.500', 3)
--INSERT INTO #TMP VALUES ('EG995GIFM', '16:38:01.677', '16:59:30.777', 4)
--INSERT INTO #TMP VALUES ('EG995GIFM', '16:59:46.737', '17:16:48.397', 5)
--INSERT INTO #TMP VALUES ('EG995GIFM', '17:04:51.243', '17:29:21.620', 6)
select ta.topcallid,
case when ta.e_created<Trans.e_created and ta.e_terminated>Trans.e_terminated then 'Consult (Stage ' + cast(TA.EmpNum as varchar(3)) + ' To ' + cast(Trans.EmpNum as varchar(3)) + ')'
when ta.e_terminated<Trans.e_created then 'Cold Transfer (Stage ' + cast(TA.EmpNum as varchar(3)) + ' To ' + cast(Trans.EmpNum as varchar(3)) + ')'
when ta.e_terminated>Trans.e_created then 'Warm Transfer (Stage ' + cast(TA.EmpNum as varchar(3)) + ' To ' + cast(Trans.EmpNum as varchar(3)) + ')'
end TransStatus
FROM #TMP TA
join #TMP Trans
on TA.topcallid=Trans.topcallid
and ta.empnum+1=Trans.empnum
order by TA.topcallid,ta.empnum
答案 3 :(得分：1)
试试这个。它基本上做了一次滞后来获得咨询，然后放弃它们并再次进行以获得转移，然后组合表格。
SELECT *
,CASE
WHEN lag(e_terminated) OVER (
PARTITION BY topcallID ORDER BY e_created
) IS NULL
THEN NULL
WHEN lag(e_terminated) OVER (
PARTITION BY topcallID ORDER BY e_created
) > e_terminated
THEN 'Consult ' + cast(lag(EmpNum) OVER (
PARTITION BY topcallID ORDER BY e_created
) AS VARCHAR) + ' to ' + cast(empnum AS VARCHAR)
WHEN lag(e_terminated) OVER (
PARTITION BY topcallID ORDER BY e_created
) < e_created
THEN 'Cold Transfer ' + cast(lag(EmpNum) OVER (
PARTITION BY topcallID ORDER BY e_created
) AS VARCHAR) + ' to ' + cast(empnum AS VARCHAR)
ELSE 'Warm Transfer ' + cast(lag(EmpNum) OVER (
PARTITION BY topcallID ORDER BY e_created
) AS VARCHAR) + ' to ' + cast(empnum AS VARCHAR)
END AS StatusTemp
INTO #temp1
FROM MyTable
SELECT a.topcallID
,coalesce(b.StatusTemp2, a.StatusTemp) AS TransStatus
FROM #temp1 a
LEFT JOIN (
SELECT *
,CASE
WHEN lag(e_terminated) OVER (
PARTITION BY topcallID ORDER BY e_created
) IS NULL
THEN NULL
WHEN lag(e_terminated) OVER (
PARTITION BY topcallID ORDER BY e_created
) > e_terminated
THEN 'Consult ' + cast(lag(EmpNum) OVER (
PARTITION BY topcallID ORDER BY e_created
) AS VARCHAR) + ' to ' + cast(empnum AS VARCHAR)
WHEN lag(e_terminated) OVER (
PARTITION BY topcallID ORDER BY e_created
) < e_created
THEN 'Cold Transfer ' + cast(lag(EmpNum) OVER (
PARTITION BY topcallID ORDER BY e_created
) AS VARCHAR) + ' to ' + cast(empnum AS VARCHAR)
ELSE 'Warm Transfer ' + cast(lag(EmpNum) OVER (
PARTITION BY topcallID ORDER BY e_created
) AS VARCHAR) + ' to ' + cast(empnum AS VARCHAR)
END AS StatusTemp2
FROM #temp1
WHERE StatusTemp NOT LIKE 'Consult%'
OR StatusTemp IS NULL
) b
ON a.empNum = b.empnum
AND a.topcallID = b.topCallID
where coalesce(b.StatusTemp2, a.StatusTemp) is not null