Sql server 这个问题的解决方案？是的。首先检查彼得的答案。参数嗅探与加速光标无关。索引确实如此。防止全表扫描，这意味着避免对字段进行任何操作。感谢您的回复。您的查询似乎有点快，但没有给我预期的输出。如果是上一次（开始时间）当前时间的差值小于20秒，则我要删除当前时间，
Sql server 这个问题的解决方案？是的。首先检查彼得的答案。参数嗅探与加速光标无关。索引确实如此。防止全表扫描，这意味着避免对字段进行任何操作。感谢您的回复。您的查询似乎有点快，但没有给我预期的输出。如果是上一次（开始时间）当前时间的差值小于20秒，则我要删除当前时间，,sql-server,tsql,sql-server-2012,Sql Server,Tsql,Sql Server 2012,这个问题的解决方案？是的。首先检查彼得的答案。参数嗅探与加速光标无关。索引确实如此。防止全表扫描，这意味着避免对字段进行任何操作。感谢您的回复。您的查询似乎有点快，但没有给我预期的输出。如果是上一次（开始时间）当前时间的差值小于20秒，则我要删除当前时间，然后我将检查开始时间和新当前时间之间的差值，如果差值小于20秒，则再次删除当前时间，如果差值大于20秒，则我的当前时间将变为开始时间，然后我要检查开始时间和下一个当前时间的差异等。。。因此，以前的时间将永远不会被删除。有关更多信息，请查看我的商
这个问题的解决方案？是的。首先检查彼得的答案。参数嗅探与加速光标无关。索引确实如此。防止全表扫描，这意味着避免对字段进行任何操作。感谢您的回复。您的查询似乎有点快，但没有给我预期的输出。如果是上一次（开始时间）当前时间的差值小于20秒，则我要删除当前时间，然后我将检查开始时间和新当前时间之间的差值，如果差值小于20秒，则再次删除当前时间，如果差值大于20秒，则我的当前时间将变为开始时间，然后我要检查开始时间和下一个当前时间的差异等。。。因此，以前的时间将永远不会被删除。有关更多信息，请查看我的商店procedure@user2928116它似乎适用于您的示例数据。你能举一个这个查询不能正常工作的例子吗？@user2928116你的存储过程有点。。。晦涩难懂的解释你想做什么，不要强迫人们对你的尝试进行反向工程。你的尝试不会有30秒的差异，可能是5秒到60秒之间的任何差异。直到
NTILEVehId Trackdt
1 2017-05-20 00:00:30.000
2 2017-05-20 00:00:32.000
2 2017-05-20 00:00:42.000
1 2017-05-20 00:00:40.000
2 2017-05-20 00:00:52.000
1 2017-05-20 00:00:50.000
1 2017-05-20 00:01:00.000
2 2017-05-20 00:01:02.000
1 2017-05-20 00:01:10.000
1 2017-05-20 00:01:20.000
2 2017-05-20 00:01:12.000
1 2017-05-20 00:01:30.000
2 2017-05-20 00:01:22.000
2 2017-05-20 00:01:32.000
VehId TRackdt
1 2017-05-20 00:00:30.000
2 2017-05-20 00:00:32.000
1 2017-05-20 00:01:00.000
2 2017-05-20 00:01:02.000
1 2017-05-20 00:01:30.000
2 2017-05-20 00:01:32.000
ALTER PROCEDURE [dbo].[DELETEINTERVALDATA]
@FROMDATE DATETIME,
@TODATE DATETIME,
@INTERVAL INT,
@FLAG INT
AS
BEGIN
SET NOCOUNT ON;
DECLARE @TRACKDT DATETIME
DECLARE @I INT =1
DECLARE @V INT =1
DECLARE @COUNT INT
DECLARE @VCOUNT INT
DECLARE @STARTDATE DATETIME = ''
DECLARE @VEHID INT
DECLARE @TIMEDIFF INT
CREATE TABLE #TEMPVEHICLE
(
SNO INT IDENTITY(1,1),
VEHID INT
)
CREATE TABLE #TEMPLOG
(
SNO INT IDENTITY(1,1),
TRACKDT DATETIME
)
IF (@FLAG = 1 )
BEGIN
INSERT INTO #TEMPVEHICLE (VEHID) SELECT VEHID FROM VEHICLEMASTER ORDER BY VEHID
SELECT @VCOUNT = COUNT(SNO) FROM #TEMPVEHICLE
WHILE (@V <= @VCOUNT)
BEGIN
SELECT @VEHID = VEHID FROM #TEMPVEHICLE WHERE SNO = @V
INSERT INTO #TEMPLOG(TRACKDT) SELECT TRACKDT
FROM TRACKINGLOG WITH(NOLOCK)
WHERE TRACKDT BETWEEN @FROMDATE AND @TODATE AND VEHID = @VEHID
ORDER BY TRACKDT ASC
SELECT @COUNT = COUNT(SNO) FROM #TEMPLOG
WHILE (@I <= @COUNT)
BEGIN
SELECT @TRACKDT=TRACKDT FROM #TEMPLOG WHERE SNO = @I
IF (@I = 1)
BEGIN
SELECT @STARTDATE = @TRACKDT
END
ELSE
BEGIN
SELECT @TIMEDIFF = DATEDIFF(SECOND,@STARTDATE,@TRACKDT)
IF @TIMEDIFF <= 20
BEGIN
DELETE FROM TRACKINGLOG WHERE TRACKDT = @TRACKDT AND VEHID = @VEHID
END
ELSE
BEGIN
SELECT @STARTDATE = @TRACKDT
END
END
SELECT @I = @I + 1
END
TRUNCATE TABLE #TEMPLOG
SELECT @V = @V + 1,@STARTDATE= '',@I=1
END
DROP TABLE #TEMPLOG
DROP TABLE #TEMPVEHICLE
END
END
ALTER PROCEDURE [dbo].[DELETEINTERVALDATA]
@FROMDATE1 DATETIME,
@TODATE1 DATETIME,
@INTERVAL1 INT,
@FLAG1 INT
AS
BEGIN
SET NOCOUNT ON;
DECLARE @TRACKDT DATETIME
DECLARE @I INT =1
DECLARE @V INT =1
DECLARE @COUNT INT
DECLARE @VCOUNT INT
DECLARE @STARTDATE DATETIME = ''
DECLARE @VEHID INT
DECLARE @TIMEDIFF INT
DECLARE @FROMDATE DATETIME = @FROMDATE1
DECLARE @TODATE DATETIME = @TODATE1
DECLARE @INTERVAL INT = @INTERVAL1
DECLARE @FLAG INT = @FLAG1
CREATE TABLE #TEMPVEHICLE
(
SNO INT IDENTITY(1,1),
VEHID INT
)
CREATE TABLE #TEMPLOG
(
SNO INT IDENTITY(1,1),
TRACKDT DATETIME
)
IF (@FLAG = 1 )
BEGIN
INSERT INTO #TEMPVEHICLE (VEHID) SELECT VEHID FROM VEHICLEMASTER ORDER BY VEHID
SELECT @VCOUNT = COUNT(SNO) FROM #TEMPVEHICLE
WHILE (@V <= @VCOUNT)
BEGIN
SELECT @VEHID = VEHID FROM #TEMPVEHICLE WHERE SNO = @V
INSERT INTO #TEMPLOG(TRACKDT) SELECT TRACKDT
FROM TRACKINGLOG WITH(NOLOCK)
WHERE TRACKDT BETWEEN @FROMDATE AND @TODATE AND VEHID = @VEHID
ORDER BY TRACKDT ASC
SELECT @COUNT = COUNT(SNO) FROM #TEMPLOG
WHILE (@I <= @COUNT)
BEGIN
SELECT @TRACKDT=TRACKDT FROM #TEMPLOG WHERE SNO = @I
IF (@I = 1)
BEGIN
SELECT @STARTDATE = @TRACKDT
END
ELSE
BEGIN
SELECT @TIMEDIFF = DATEDIFF(SECOND,@STARTDATE,@TRACKDT)
IF @TIMEDIFF <= 20
BEGIN
DELETE FROM TRACKINGLOG WHERE TRACKDT = @TRACKDT AND VEHID = @VEHID
END
ELSE
BEGIN
SELECT @STARTDATE = @TRACKDT
END
END
SELECT @I = @I + 1
END
TRUNCATE TABLE #TEMPLOG
SELECT @V = @V + 1,@STARTDATE= '',@I=1
END
DROP TABLE #TEMPLOG
DROP TABLE #TEMPVEHICLE
END
END
Declare @myTable table (vehid int, trackdt datetime)
insert into @mytable values
(1, '2017-05-20 00:00:30.000'),
(2, '2017-05-20 00:00:32.000'),
(2, '2017-05-20 00:00:42.000'),
(1, '2017-05-20 00:00:40.000'),
(2, '2017-05-20 00:00:52.000'),
(1, '2017-05-20 00:00:50.000'),
(1, '2017-05-20 00:01:00.000'),
(2, '2017-05-20 00:01:02.000'),
(1, '2017-05-20 00:01:10.000'),
(1, '2017-05-20 00:01:20.000'),
(2, '2017-05-20 00:01:12.000'),
(1, '2017-05-20 00:01:30.000'),
(2, '2017-05-20 00:01:22.000'),
(2, '2017-05-20 00:01:32.000')
--set @@rowcount to 1
select 1
while @@ROWCOUNT > 0
begin
DELETE T1
from @mytable t1
--previous time
outer apply (select top 1 trackdt from @mytable where vehid = t1.vehid and trackdt < t1.trackdt order by 1 desc)t2
--previous time before that
outer apply (select top 1 trackdt from @mytable where vehid = t1.vehid and trackdt < t2.trackdt order by 1 desc)t3
--previous time was less or equal to 20 seconds
where DATEDIFF(second,t2.trackdt,t1.trackdt)<=20
--previous time before that was more than 20 seconds or there is no time before
and (DATEDIFF(second,t3.trackdt,t2.trackdt)>20 or t3.trackdt is null)
end
select * from @mytable
select * ,
FIRST_VALUE(trackdt) over (partition by vehid order by trackdt) as t0
from @mytable
1 2017-05-20 00:00:30.000 2017-05-20 00:00:30.000
1 2017-05-20 00:00:40.000 2017-05-20 00:00:30.000
1 2017-05-20 00:00:50.000 2017-05-20 00:00:30.000
select * ,
FIRST_VALUE(trackdt) over (partition by vehid order by trackdt) as t0,
datediff(s,FIRST_VALUE(trackdt) over (partition by vehid order by trackdt),
trackdt) as interval
from @mytable
1 2017-05-20 00:01:10.000 2017-05-20 00:00:30.000 1
1 2017-05-20 00:01:20.000 2017-05-20 00:00:30.000 1
1 2017-05-20 00:01:30.000 2017-05-20 00:00:30.000 2
2 2017-05-20 00:00:32.000 2017-05-20 00:00:32.000 0
2 2017-05-20 00:00:42.000 2017-05-20 00:00:32.000 0
select * ,
FIRST_VALUE(trackdt) over (partition by vehid order by trackdt) as t0,
datediff(s,FIRST_VALUE(trackdt) over (partition by vehid order by trackdt),
trackdt) %30 as remainder
from @mytable
1 2017-05-20 00:01:00.000 2017-05-20 00:00:30.000 0
1 2017-05-20 00:01:10.000 2017-05-20 00:00:30.000 10
1 2017-05-20 00:01:20.000 2017-05-20 00:00:30.000 20
1 2017-05-20 00:01:30.000 2017-05-20 00:00:30.000 0
2 2017-05-20 00:00:32.000 2017-05-20 00:00:32.000 0
with start_times as
(
select * ,
FIRST_VALUE(trackdt) over (partition by vehid order by trackdt) as t0
from @mytable
),
intervals as
(
select * ,
datediff(s,t0,trackdt) %30 as rem
from start_times
)
delete
from intervals
where rem<>0
with start_times as
(
select * ,
FIRST_VALUE(trackdt) over (partition by vehid order by trackdt) as t0
from #mytable
),
intervals as
(
select * ,
datediff(s,t0,trackdt) /30 as interval
from start_times
),
ordered as
(
select *,
ROW_NUMBER() over(partition by vehid,interval order by trackdt) row_num
from intervals
)
select vehid,trackdt
from ordered
where row_num>1
DELETE HugeTable
From HugeTable
INNER JOIN TempTable on TempTable.ID=HugeTable.ID
select ID,NTILE(100) over(order by vehid,trackdt) as batch_number
from ordered
where row_num=1