Power BI：最近24小时和7天的切片器

Question

Gone through various forums and other similar questions but none has worked for me!

I got Timestamp column in this format: DD:MM:YYY HH:MM:SS PM/AM

So how do I create a calculated column that dynamically evaluates the last 24 hours from the refresh time of 8:00 AM daily morning (ie, it should consider the last 24 hours from previous day 8:00 AM to refresh time 8:00 AM today.

Likewise, the last 7 days too?

I have tried following (for last 24 hours) which I got from https://community.powerbi.com/t5/Desktop/Only-show-last-24-hours-from-6am/td-p/109226
Power bi forum question.

Measure:

minTime = 
var temp= NOW()
return
if(HOUR(temp)>=8,temp,DATE(YEAR(temp),MONTH(temp),DAY(temp)-1)+TIME(8,MINUTE(temp),SECOND(temp)))

Table column:

New Table= FILTER(ALL(TABLE),[Date]>=[minTime]&&[Date]<=Now())

But it is giving me an error as

The expression refers to multiple columns. Multiple columns cannot be converted to a scalar value.

Any help is much appreciated.

Answer 1

Try this - In my case I imported IIS logs after converting them to CSV files.

For me I think there was about 100 log files from 1/2 dz servers in the farm

1. Import your data
2. The columns available were LogFilename RowNumber date time s-ip cs-method cs-uri-stem cs-uri-query s-port cs-username c-ip cs(User-Agent) sc-status sc-substatus sc-win32-status time-taken

3. My Time value looked like this hh:mm:ss - but I wanted to get how many per hour

4. Add a new column "PerHour = Hour(Teams[time])" - Teams is the table name and time is the column name and PerHour is the NEW column name Ref: https://msdn.microsoft.com/en-us/query-bi/dax/hour-function-dax

Now I have a column and I can do a count for how may time the occurrence happened in that hour