Sql 比较两个表，找出它们之间的差异

我有两张桌子：桌子A和桌子B

我需要比较两个表中的两个特定列（AnsId和Content），并得到它们的差异。 如果没有发现差异，则我应返回“流程成功”，否则返回“失败”

表a

+--------+-----------+---------+-------------+
|   Id   |  RSCId    | AnsId   |  Content    |
+--------+-----------+---------+-------------+
|    1   |   12      |  1      | Test data.  |
|    2   |   12      |  0      | Sample Test.|
|    3   |   12      |  5      | Test data.  |
|    4   |   12      |  7      | Test Data.  |
|    5   |   12      |  46     | Test datas. |
+--------+-----------+---------+-------------+

表B

    +--------+-----------+---------+-------------+
    |   Id   |  RSCId    | AnsId   |  Content    |
    +--------+-----------+---------+-------------+
    |    1   |   35      |  2      | Test .      |
    |    2   |   35      |  0      | Sample Test.|
    |    3   |   35      |  5      | Test data.  |
    |    4   |   35      |  7      | Test Data.  |
    |    5   |   35      |  46     | Test datas. |
    +--------+-----------+---------+-------------+

---

请帮助我。

我尝试了您的查询。但我需要一个输出，说明“两个表不匹配”

select case when sum(case when a.ansid is null or b.ansid is null 
                          then 1
                     end) > 0 
            then 'mismatch'
            else 'ok'
       end as result
from tableA a
full outer join tableB b on a.ansid = b.ansid and a.content = b.content