Want to protect your cyber security and still get fast solutions? Ask a secure question today.Go Premium

x
  • Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 424
  • Last Modified:

Parse DateTime and half hourly period into single DateTime

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
wint100
Asked:
wint100
1 Solution
 
Dale BurrellDirectorCommented:
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
 
wint100Author Commented:
Great, simple but exactly what I needed.
0

Featured Post

Concerto Cloud for Software Providers & ISVs

Can Concerto Cloud Services help you focus on evolving your application offerings, while delivering the best cloud experience to your customers? From DevOps to revenue models and customer support, the answer is yes!

Learn how Concerto can help you.

Tackle projects and never again get stuck behind a technical roadblock.
Join Now