来自 2 个不同表的 DISTINCT 列

Question

I have 2 tables with similar information. Let's call them DAILYROWDATA and SUMMARYDATA .

Table DAILYROWDATA

NIP  NAME   DEPARTMENT
A1   ARIA   BB
A2   CHLOE  BB
A3   RYAN   BB
A4   STEVE  BB

Table SUMMARYDATA

NIP  NAME   DEPARTMENT  STATUSIN                STATUSOUT
A1   ARIA   BB          1/21/2020  8:06:23 AM   1/21/2020  8:07:53 AM
A2   CHLOE  BB          1/21/2020  8:16:07 AM   1/21/2020  9:51:21 AM
A1   ARIA   BB          1/22/2020  9:06:23 AM   1/22/2020  10:07:53 AM
A2   CHLOE  BB          1/22/2020  9:16:07 AM   1/22/2020  10:51:21 AM
A3   RYAN   BB          1/22/2020  8:15:03 AM   1/22/2020  9:12:03 AM

And I need to combine these two tables and show all data in table DAILYROWDATA and set the value if STATUSIN = NULL and STATUSOUT = Null then write 'NA'. This is the output that I meant:

NIP  NAME   DEPARTMENT  STATUSIN                STATUSOUT
A1   ARIA   BB          1/21/2020  8:06:23 AM   1/21/2020  8:07:53 AM
A2   CHLOE  BB          1/21/2020  8:16:07 AM   1/21/2020  9:51:21 AM
A3   RYAN   BB          NA                      NA
A4   STEVE  BB          NA                      NA
A1   ARIA   BB          1/22/2020  9:06:23 AM   1/22/2020  10:07:53 AM
A2   CHLOE  BB          1/22/2020  9:16:07 AM   1/22/2020  10:51:21 AM
A3   RYAN   BB          1/22/2020  8:15:03 AM   1/22/2020  9:12:03 AM
A4   STEVE  BB          NA                      NA

I need to add some condition, so, i wanna set the value STATUSIN = NULL just when there is no NIP,NAME,DEPARTMENT,STATUSIN,STATUSOUT in one date.. so, that's can be multiple

Answer 1

You want a left join to bring the two tables together. The trickier part is that you need strings in order to represent the 'NA' :

select drd.*,
       coalesce(cast(statusin as varchar(255)), 'NA') as statusin,
       coalesce(cast(statusout as varchar(255)), 'NA') as statusout
from DAILYROWDATA drd left join
     SUMMARYDATA sd
     on drd.nip = sd.nip;