Editor Lookup nearest date

[Analitika]

I need in editor add column which must found currency value at operation date, if currency value not exists on operation date, then take last nearest date value

Table1

Date | AddColumn

2020-01-01 | 

2020-01-05 |

Table2
Date | Currency | Value

2020-01-01 | USD | 0.8124545
2020-01-03 | USD | 0.8524545
2020-01-06 | USD | 0.8924545

expected result

Table1

Date | AddColumn

2020-01-01 | 0.8124545

2020-01-05 | 0.8524545

[amitchandak · Accepted solution]

@Analitika , Try a new column table 1

New column =
var _excat = maxx(filter(Table2, Table1[Date] = Table2[Date] ),Table2[Value])
var _min = datediff(Table1[Date], maxx(filter(Table2, Table1[Date] < Table2[Date] ),Table1[Date]),day)
var _max = datediff(Table1[Date],minx(filter(Table2, Table1[Date] > Table2[Date] ),Table1[Date]),day)
return
if(not(isblank(_excat)),_excat, if(abs(_min) <abs(_max),maxx(filter(Table2, Table2[Date] =_min ),Table2[Value]),,maxx(filter(Table2, Table2[Date] =_max ),Table2[Value])))

[Analitika]

TY, it works with some addition correction, as you in  return use _max but need date