Search a copied value MACRO - excel

Question

I have two sheets:
Database
Macro sheet: It has a row with dates that will be the headings of a table after the macro.
Objective: In the macro sheet take the value of the first date and look for its position in the database sheet. Then, in the database sheet, copy the entire column corresponding to the previously copied date.
I understand that the code should look something like this:
Sheets("Macro").Select
Range("K3").Select
Selection.Copy
Sheets("Database").Select
Cells.Find(What:=Selection.PasteSpecial xlValues, After:=ActiveCell, LookIn:=xlFormulas, _
LookAt:=xlPart, SearchOrder:=xlByRows, SearchDirection:=xlNext, _
MatchCase:=False, SearchFormat:=False).Activate
Range(Selection, Selection.End(xlDown)).Select
Selection.Copy
Sheets("Macro").Select
ActiveSheet.Paste
This code does not work, because the search part is not done well, I will appreciate some correction

Answer 1

Something along these lines.
Read this to learn the advantages of not using Select or Activate.
When using Find, always check first that your search term is found to avoid an error. For example, you cannot activate a cell that does not exist.
Sub x()
Dim r As Range
With Sheets("Database")
Set r = .Cells.Find(What:=Sheets("Macro").Range("K3").Value, lookAt:=xlPart, _
SearchOrder:=xlByRows, SearchDirection:=xlNext, _
MatchCase:=False, SearchFormat:=False)
If Not r Is Nothing Then
Range(r, r.End(xlDown)).Copy Sheets("Macro").Range("A1")
End If
End With
End Sub

Answer 2

Loop through he header dates in the Macro worksheet. If any can be found in the header row of the Database worksheet, copy that column to the Macro worksheet under the header.
sub getDateData()
dim h as long, wsdb as worksheet, m as variant, arr as variant
set wsdb = worksheets("database")
with worksheets("macro")
for h=1 to .cells(1, .columns.count).end(xltoleft).column
m = application.match(.cells(1, h).value2, wsdb.rows(1), 0)
if not iserror(m) then
arr = wsdb.range(wsdb.cells(2, m), wsdb.cells(rows.count, m).end(xlup)).value
.cells(2, h).resize(ubound(arr, 1), ubound(arr, 2)) = arr
end if
next h
end with
end sub