Solved

Parse DateTime and half hourly period into single DateTime

Posted on 2014-02-10
2
388 Views
Last Modified: 2014-02-10
Hi,

I have a View that returns half hourly data samples and a column called ReadingDate which is the sanple days date (i.e. 2011-11-09 00:00:00) and a 'Period' column which returns the half hourly period (i.e. 1-48). I need to combine these 2 values within a Stored procedure to give the sample DateTime.

Attached is the sample data from the table and also part of my SP where I need to use the parsed out DateTime. Currently I'm using the ReadingDate directly, but I need to be inserting the parsed DateTime instead throughout this query instead of ReadingDate or timestamp (timestamp is no longer in use, but could be the name of the parsed DateTime).

INSERT INTO #ReportData (Timestamp, Hundredths, Data, Datestamp, CalendarDate, BaseloadData,Occupancy, OAT, SpaceTemp, Widgets,ManualRead,BaseloadManualRead,ManualConsumption)
SELECT ReadingDate, 0, Readingkwh
       ,case when @reportselection = 'Y' then convert(char(6),timestamp,112)+'01' else convert(char(8),timestamp,112) end
       ,convert(char(8),timestamp,112)
       ,0
       ,case when @occtl = 0 then NULL else (SELECT top 1 convert(int,data) 
                 FROM HistorianDB.dbo.TLData O
                 WHERE O.TLInstance = @Occtl
                 AND O.timestamp <= M.timestamp
                 AND O.Type=0 
                 AND isnumeric(O.data) = 1
                 ORDER BY O.timestamp desc) end
       ,case when @oattl = 0 then 0 else (SELECT top 1 convert(real,data) 
         FROM HistorianDB.dbo.TLData O
         WHERE O.TLInstance = @OatTl
         AND O.timestamp between @sdate_trimmed and M.timestamp
         AND O.Type=0 
         AND isnumeric(O.data) = 1
         ORDER BY O.timestamp desc) end
       ,case when @Spacetl = 0 then 0 else (SELECT top 1 convert(real,data) 
         FROM HistorianDB.dbo.TLData O
         WHERE O.TLInstance = @SpaceTl
         AND O.timestamp between @sdate_trimmed and M.timestamp
         AND O.Type=0 
         AND isnumeric(O.data) = 1
         ORDER BY O.timestamp desc) end
		 ,0,
         MeterReading
         ,0,Consumption

FROM ERM.dbo.EnergyDisplayValues M
WHERE MeterID = @MeterID
AND ((m.ReadingDate between @sdate_trimmed and @edate) or(m.ReadingDate between @sdate2 and @edate2))
ORDER BY m.ReadingDate,m.Period

Open in new window


SampleData.txt
0
Comment
Question by:wint100
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
2 Comments
 
LVL 21

Accepted Solution

by:
Dale Burrell earned 500 total points
ID: 39846878
Sorry, a quick answer which will hopefully set you on the right track.

Now it depends whether you want the first minute of the half hour or the last, I am assuming the first would would be

dateadd(minute, (Period-1)*30, ReadingDate)

but if you need the last it would be

dateadd(minute, Period*30, ReadingDate)

HTH
0
 
LVL 1

Author Comment

by:wint100
ID: 39846900
Great, simple but exactly what I needed.
0

Featured Post

Microsoft Certification Exam 74-409

Veeam® is happy to provide the Microsoft community with a study guide prepared by MVP and MCT, Orin Thomas. This guide will take you through each of the exam objectives, helping you to prepare for and pass the examination.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Confronted with some SQL you don't know can be a daunting task. It can be even more daunting if that SQL carries some of the old secret codes used in the Ye Olde query syntax, such as: (+)     as used in Oracle;     *=     =*    as used in Sybase …
If you have heard of RFC822 date formats, they can be quite a challenge in SQL Server. RFC822 is an Internet standard format for email message headers, including all dates within those headers. The RFC822 protocols are available in detail at:   ht…
There's a multitude of different network monitoring solutions out there, and you're probably wondering what makes NetCrunch so special. It's completely agentless, but does let you create an agent, if you desire. It offers powerful scalability …
In this brief tutorial Pawel from AdRem Software explains how you can quickly find out which services are running on your network, or what are the IP addresses of servers responsible for each service. Software used is freeware NetCrunch Tools (https…

719 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question