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A Power Query M query for use with Power BI incremental refresh that gets a list of top stories from the BBC News RSS feed
let
//Connect to the BBC News Top Stories RSS feed
//and create a nicely formatted table
Source = Xml.Tables(Web.Contents("http://feeds.bbci.co.uk/news/rss.xml")),
#"Changed Type" = Table.TransformColumnTypes(Source,{{"Attribute:version", Int64.Type}}),
channel = #"Changed Type"{0}[channel],
#"Changed Type1" = Table.TransformColumnTypes(channel,{{"title", type text}, {"description", type text}, {"link", type text}, {"generator", type text}, {"lastBuildDate", type datetime}, {"copyright", type text}, {"language", type text}, {"ttl", Int64.Type}}),
item = #"Changed Type1"{0}[item],
#"Changed Type2" = Table.TransformColumnTypes(item,{{"title", type text}, {"description", type text}, {"link", type text}, {"pubDate", type datetime}}),
#"Removed Columns" = Table.RemoveColumns(#"Changed Type2",{"guid"}),
#"Renamed Columns" = Table.RenameColumns(#"Removed Columns",{{"title", "Title"}, {"description", "Description"}, {"link", "Link"}, {"pubDate", "Publication Date"}}),
//Find the current date and time when this query runs
CurrentDateTime = DateTimeZone.FixedUtcNow(),
//Find yesterday's date
PreviousDay = Date.AddDays(DateTime.Date(CurrentDateTime),-1),
//Put the current date and time in a new column in the table
#"Added Custom" = Table.AddColumn(#"Renamed Columns", "UTC Data Load Date", each CurrentDateTime),
#"Changed Type3" = Table.TransformColumnTypes(#"Added Custom",{{"UTC Data Load Date", type datetimezone}}),
//Add the filter required for incremental refresh
//Only return rows in this table if:
//a) The RangeStart parameter equals yesterday's date, and
//b) RangeEnd is not null (which should never be true)
#"Filtered Rows" = Table.SelectRows(#"Changed Type3", each DateTime.Date(RangeStart)=PreviousDay and RangeEnd<>null)
in
#"Filtered Rows"
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