如何比较 SQL 中没有唯一标识符的两个表

Question

我有两个结构相同但没有唯一标识符的表。如何比较这两个表

我尝试使用行号来比较它们。代码如下

WITH source AS  
(  
     SELECT 
         ROW_NUMBER() OVER(ORDER BY Customer Account    address) AS RowN,   
         Customer Account address
     FROM 
         old
)  

WITH target AS  
(  
     SELECT 
         ROW_NUMBER() OVER(ORDER BY Customer Account    address) AS RowN,   
         Customer Account address
     FROM 
         New
)  

SELECT 
    s.address, t.address 
FROM
    source s
JOIN
    traget t ON s.RowN = t.RowN
WHERE
    s.Customer != t.Customer
    OR s.Account != t.Account
    OR s.address != t.address

例外结果：

s.address   t.address
---------------------
BB1         BB2

但是我得到一个错误

Incorrect syntax near the keyword 'WITH'

微软SQL服务器版本：微软SQL服务器2017

Answer 1

实际上，您可以使用 EXCEPT table 运算符：喜欢这里：

WITH 
old_table(cust,accnt,addr) AS (
            SELECT 'AAAA',101,'AA1'
  UNION ALL SELECT 'BBBB',102,'BB1'
  UNION ALL SELECT 'CCCC',102,'BB1'
)
,
new_table AS (
            SELECT 'AAAA',101,'AA1'
  UNION ALL SELECT 'BBBB',102,'BB1'
  UNION ALL SELECT 'CCCC',102,'BB2'
)
(
SELECT * FROM old_table
EXCEPT
SELECT * FROM new_table
)
UNION ALL 
(
SELECT * FROM new_table
EXCEPT
SELECT * FROM old_table
)
;
-- out  cust | accnt | addr 
-- out ------+-------+------
-- out  CCCC |   102 | BB1
-- out  CCCC |   102 | BB2

Answer 2

你漏掉了很多逗号 ;)

WITH source AS  
(  
     SELECT ROW_NUMBER() OVER(ORDER BY Customer ,Account, address) AS RowN,   
    Customer,    Account ,address
FROM old
)  
, target AS  
(  
     SELECT ROW_NUMBER() OVER(ORDER BY Customer, Account ,address) AS RowN,   
    Customer,    Account, address
FROM New
)  

Select s.address , t.address 
from source s
join traget t on s.RowN =t.RowN
where s.Customer <> t.Customer
or s.Account <> t.Account
or s.address <> t.address

如何比较 SQL 中没有唯一标识符的两个表

How to compare two tables without unique identifier in SQL

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sql-server

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