Find value from one csv in another one (like vlookup) in bash (Linux)

Question

I have already tried all options that I found online to solve my issue but without good result.

Basically I have two csv files (pipe separated):

file1.

Answer 1

You can use Miller (https://github.com/johnkerl/miller).

Starting from input01.txt

123|21|0452|IE|IE|1|MAYOBAN|BRIN|OFFICE|STREET|MAIN STREET|MAYOBAN|
123|21|0453|IE|IE|1|CORKKIN|ROBERT|SURNAME|CORK|APTS|CORKKIN|
123|21|0452|IE|IE|1|CORKCOR|NAME|HARRINGTON|DUBLIN|STREET|CORKCOR|

and input02.txt

MAYOBAN|BANGOR|2400
MAYOBEL|BELLAVARY|2400
CORKKIN|KINSALE|2200
CORKCOR|CORK|2200
DUBLD11|DUBLIN 11|2100

and running

mlr --csv -N --ifs "|" join  -j 7 -l 7 -r 1 -f input01.txt then cut -f 3 input02.txt

you will have

2400
2200
2200

Some notes:

• -N to set input and output without header;
• --ifs "|" to set the input fields separator;
• -l 7 -r 1 to set the join fields of the input files;
• cut -f 3 to extract the field named 3 from the join output