Hiya guys! I'm querying a boat load of historical data and I've noticed that the fetching rows pop up counts up to about 3x the number of rows that load (number of rows that load is approx. correct). I'm getting data 1 month at a time (it breaks if I ask for more) and the data logger runs just over 1Hz which means I should get around 2.5e6 rows at a time but the system says it fetches 7.5e6 rows
Here is the snippet of code that does the query
Open Database(
"driver={SQL Server}; Server=XXXXXXXXXX; database=Runtime; trusted_connection=yes;",
"SET NOCOUNT ON
DECLARE @StartDate DateTime
DECLARE @EndDate DateTime
SET @StartDate = '2023-5-1 00:00:00'
SET @EndDate = '2023-5-31 23:59:59'
SELECT temp.TagName, DateTime = convert(varchar, DateTime, 126), vValue From (
SELECT * FROM History WHERE History.TagName IN (" || tagnamelist || ")
AND vValue IS NOT NULL
AND wwRetrievalMode = 'Delta'
AND wwVersion = 'Latest'
AND DateTime >= @StartDate
AND DateTime <= @EndDate) temp
LEFT JOIN AnalogTag ON AnalogTag.TagName = temp.TagName
LEFT JOIN EngineeringUnit ON AnalogTag.EUKey = EngineeringUnit.EUKey
LEFT JOIN QualityMap ON QualityMap.QualityDetail = temp.QualityDetail
WHERE temp.StartDateTime >= @StartDate"
);And the screen capture of the pop up near the end of the query
Cheers,
Zach
