How to exclude records from results when ID from A table is in PID column of B table for the same PUID

问题

How to exclude records from results when ID from A table is in PID column of B table for the same PUIDenter image description here

Table A:

PUID      PID          SYSTEMCODE      ID

100000  701848421         A         3207479

Table B:

PUID    PID        SYSTEMCODE

100000  3207479     B

100000  6805875     B

回答1:

Use not exists:

select a.*
from tablea a 
where not exists (select 1 from tableb b where b.pid = a.id and b.puid = a.puid)

来源：https://stackoverflow.com/questions/64794523/how-to-exclude-records-from-results-when-id-from-a-table-is-in-pid-column-of-b-t