How to check if Date A is X days before Date B?

[stan255]

I have two date columns - Date A and Date B.

How can I check if Date A is within 7 days before any of Date B?

[Omid_Motamedise · Accepted solution]

Copy the below code and paste it into the advance editor.

let
    TableA = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("fY9LDoAgDETv0rUJ7YCCZ2m4/zXEFZ2auHzJfN3FatFRoGgyDxdchIvuTbawbxwktVZMA3a2DrKCWw08wj7iGFWpKC1+vUGMzlEnYVrFh6r+PkjBYHE4NB8=", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable date) meta [Serialized.Text = true]) in type table [Date = _t]),
    TableAChangedType = Table.TransformColumnTypes(TableA,{{"Date", type date}}),
    TableB = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WMtc3sNQ3MjAyUYrViVYyNEbhmqHwTPQNDRA8CxQ5I6A5FriUGhugqDVHkTSyROiMBQA=", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable date) meta [Serialized.Text = true]) in type table [Date = _t]),
    TableBChangedType = Table.TransformColumnTypes(TableB,{{"Date", type date}}),
    Custom1 = Table.AddColumn(TableAChangedType, "Flag", each not Table.IsEmpty(Table.SelectRows(TableBChangedType, (x)=> x[Date]>=[Date] and Date.AddDays(x[Date],-7)<=[Date])))
in
    Custom1

I have added a new column into Table A with true value for the rows which are with in the 7 days of at least a date in Table B

[Omid_Motamedise · Accepted solution]

Copy the below code and paste it into the advance editor.

let
    TableA = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("fY9LDoAgDETv0rUJ7YCCZ2m4/zXEFZ2auHzJfN3FatFRoGgyDxdchIvuTbawbxwktVZMA3a2DrKCWw08wj7iGFWpKC1+vUGMzlEnYVrFh6r+PkjBYHE4NB8=", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable date) meta [Serialized.Text = true]) in type table [Date = _t]),
    TableAChangedType = Table.TransformColumnTypes(TableA,{{"Date", type date}}),
    TableB = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WMtc3sNQ3MjAyUYrViVYyNEbhmqHwTPQNDRA8CxQ5I6A5FriUGhugqDVHkTSyROiMBQA=", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable date) meta [Serialized.Text = true]) in type table [Date = _t]),
    TableBChangedType = Table.TransformColumnTypes(TableB,{{"Date", type date}}),
    Custom1 = Table.AddColumn(TableAChangedType, "Flag", each not Table.IsEmpty(Table.SelectRows(TableBChangedType, (x)=> x[Date]>=[Date] and Date.AddDays(x[Date],-7)<=[Date])))
in
    Custom1

I have added a new column into Table A with true value for the rows which are with in the 7 days of at least a date in Table B

[jgeddes]

Something like this might work for you...

[stan255]

Thanks for this solution. I'm getting this error

"DataFormat.Error: We couldn't convert to Date.
Details:
[List]"

[Anonymous · Accepted solution]

Hi,

Thanks for the solutions @Omid_Motamedise  and @jgeddes  offered, and i want to offer some more information for user to refer to.

hello @stan255 , baded on your picture, your two date columns come from different tables, in table A , you can create a cusotm column.

let a=Query2[reportedDate],
b=[Open],
c=List.Count(List.Select(a,each b>=Date.AddDays(_,-7) and b<=_))
in if c>0 then "Y" else "N"

Output

You can refer to the attachment.

Best Regards!

Yolo Zhu

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