sql - 需要找出表之间的差异

Question

我的表结构如下:

我需要找到表之间的差异，因为哪些数据在另一个表中不可用(反之亦然)。 我可以找到不同之处如下:

使用的 SQL 查询:

select * 
from (select input_name_id, count(1) as cnt
      from Table1
      group by input_name_id
     ) a join 
     (select input_name_id, count(1) as cnt
      from Table2
      group by input_name_id
     ) b
     on (a.input_name_id = b.input_name_id)
where a.cnt <> b.cnt

预期结果:

我尝试了多种方法来提取数据，但我做不到! 非常感谢您的帮助。谢谢

Answer 1

两件事:(1)全外连接； (2) 枚举具有相同值的行:

select * 
from (select input_name_id, match_id, name, 
             row_number() over (partition by input_name_id, match_id, name order by name) as seqnum
      from Table1
     ) a full join 
     (select input_name_id, match_id, name, 
             row_number() over (partition by input_name_id, match_id, name order by name) as seqnum
      from Table2
     ) b
     on a.input_name_id = b.input_name_id and
        a.match_id = b.match_id and
        a.name = b.name and
        a.seqnum = b.seqnum
where a.seqnum is null or b.seqnum is null;