How to use CASE statement when having multiple hierarchy picks - forum topic by ASOORI15

Hello Experts,
I am  fairly new to Teradata and need help  to sort my issue.
I have a scenario where one line item has multiple status_codes. there is a hierarchy  preference set for these  status_codes to pick just one.
I have to use a Case statement(i think) to pick the appropriate Status_code for a given line item
Current situation:  there is a one to many relationship between LINE ITEM and STATUS CODE
FIX: I  have to get a ONE to ONE relationship between LINE_ITEM and STATUS_CODE. i.e if one line_item is assigned to multiple codes then pick the highest rank code in hierarchy.
EXAMPLE:
LINE_ITEM          STATUS_CODE
1234                          A
1234                          U
456                            G
1234                           F
567                             A
 
HIERARCHY given by business:
  Rank          Status_code

1.             A
2.             U
3.             1
4.             G
5.             F
6.             E
7.             L
8.             C

I would greatly appreciate for a quick solution.
Thanks,
AM