excel - How to return multiple values using index/match? -

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i have below simple table:

a   1 b   2 c   2 d   1

using index/match formula, have set looks @ 1 row @ time.

however, when drag formula down , ask return second column 2. receive n/a @ top , bottom of lookup.

is there way me ask skip when there na or return multiple rows?

here code:

=index(b2,match(1,c2))

which returns:

a   1       b   2       #n/a c   2       #n/a d   1       d

i return:

a   1       b   2       d c   2        d   1

so skiiping rows there no match.

the easiest way have skip value na either put if statement 

=if(a1 = "na","",index(match))

or if na because not finding match

=iferror(index(match),"")

one of 2 should it. if not please post code.


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