Question

我需要找到2个结构相似的sql表之间的差异每个表都从第3个paty工具上传到sqlserver数据库。

表结构是：

Issue ID-status-Who

问题ID不会在表中重复，但未明确定义为主键

任何两个表之间都可能有添加/删除/更新。

我需要什么

Number of rows added & their details
Number of rows deleted & their details
Number of rows updates & their details

我该怎么做

1）使用sql更好 2）或使用数据表

Answer 1

您可以使用两个左连接和常规连接来执行此更新。对于TableA，这将向您显示添加，删除和更新哪些行。请注意，这些可以连接成一个结果集。

select b.*, 'added'
from tableb b
   left outer join tablea a on b.IssueID = a.IssueID
where a.IssueID is null

select a.*, 'deleted'
from tablea a
    left outer join tableb b on a.IssueID = b.IssueID
where b.IssueID is null

select a.*, 'updated'
from tablea a
    join tableb b on a.IssueID = b.IssueID
where a.Status <> b.Status or a.Who <> b.Who

注意后者，如果你需要处理空值，我认为你需要调整where子句。

如果表很大并且这是一个持续的操作，您应该考虑在连接列上添加索引。

Answer 2

除非您想将每个表的全部内容复制到C＃中，否则请在数据库中执行。

这将找到所有缺少的TableA或TableB行，以及任何更改：

;WITH AllPKs AS
(
SELECT ID FROM TableA
UNION ID FROM TableB
)
SELECT
    z.ID,a.*, b.*
    FROM AllPKs                z
        LEFT OUTER JOIN TableA a ON z.ID=a.ID
        LEFT OUTER JOIN Tableb b ON z.ID=b.ID
    WHERE A.ID IS NULL OR B.ID IS NULL OR a.Col1!=b.Col1 OR a.Col2!=b.Col2 OR...

Answer 3

我听说过有关Redgate SQL Data Compare

的好消息

Answer 4

要查找更新，您需要将每列的值与另一个表进行比较。

select 'updated',
   a.IssueID as IssueID_A, b.IssueID as IssueID_B
   a.Status as Status_A, b.Status as Status_B,
   a.Who as Who_A, b.Who as Who_B
from tablea a
inner join tableb b 
   on a.IssueID = b.IssueID 
where a.Status <> b.Status or a.Who <> b.Who

Answer 5

一般情况下，我会推荐像Redgate SQL Data Compare这样的产品，但作为一个产品，你可以使用这样的脚本：

-- Create some tables and data for testing purposes
USE [tempdb]
SET NOCOUNT ON
GO

DROP TABLE [Issues1]
DROP TABLE [Issues2]
GO

CREATE TABLE [Issues1] ([IssueID] int, [Status] varchar(max), [Who] varchar(max))
CREATE TABLE [Issues2] ([IssueID] int, [Status] varchar(max), [Who] varchar(max))
GO

INSERT [Issues1] VALUES (1, 'aaa', 'bbb')
INSERT [Issues1] VALUES (2, 'ccc', 'ddd')
INSERT [Issues1] VALUES (3, 'eee', 'fff')
GO

INSERT [Issues2] VALUES (1, 'aaa', 'bbb')
INSERT [Issues2] VALUES (3, 'ggg', 'hhh')
INSERT [Issues2] VALUES (4, 'iii', 'iii')
GO

-- **** START OF ANSWER PROPER ****

-- Create some temporary variables to store the change details
DECLARE @Inserts TABLE ([IssueID] int, [Status] varchar(max), [Who] varchar(max))
DECLARE @Updates TABLE ([IssueID] int, [OldStatus] varchar(max), [NewStatus] varchar(max), [OldWho] varchar(max), [NewWho] varchar(max))
DECLARE @Deletes TABLE ([IssueID] int, [Status] varchar(max), [Who] varchar(max))

-- Find all rows that exist in Issues2 but do not exist in Issues1
-- (matching on ID)
INSERT @Inserts
SELECT *
FROM [Issues2]
WHERE [IssueID] NOT IN
(
    SELECT
        [IssueID]
    FROM [Issues1]
)

-- Find all rows existing in both Issues1 and Issues2 (matching on ID)
-- and where either Status or Who has changed
INSERT @Updates
SELECT
    [Issues1].[IssueID],
    [Issues1].[Status],
    [Issues2].[Status],
    [Issues1].[Who],
    [Issues2].[Who]
FROM [Issues1]
    INNER JOIN [Issues2] ON [Issues2].[IssueID] = [Issues1].[IssueID]
        AND
        (
            [Issues2].[Status] != [Issues1].[Status]
                OR [Issues2].[Who] != [Issues1].[Who]
        )

-- Find all rows that exist in Issues1 but do not exist in Issues2
-- (matching on ID)
INSERT @Deletes
SELECT *
FROM [Issues1]
WHERE [IssueID] NOT IN
(
    SELECT
        [IssueID]
    FROM [Issues2]
)

-- Output the results
SELECT
    (SELECT COUNT(*) FROM @Inserts) AS [Number Inserted],
    (SELECT COUNT(*) FROM @Updates) AS [Number Updated],
    (SELECT COUNT(*) FROM @Deletes) AS [Number Deleted]

SELECT 'INSERTED', * FROM @Inserts
SELECT 'UPDATED', * FROM @Updates
SELECT 'DELETED', * FROM @Deletes
GO

Answer 6

如果您想避免列出要比较的所有列以及是否要包含并输入相同的行，您可以执行以下操作：

--Data setup
d r o p table tableA;
d r o p table tableB;

create table tableA as (
   select rownum-1 ID, chr(rownum-1+70) bb, chr(rownum-1+100) cc 
      from dual connect by rownum<=4
);

create table tableB as (
   select rownum ID, chr(rownum+70) data1, chr(rownum+100) cc from dual
   UNION ALL
   select rownum+2 ID, chr(rownum+70) data1, chr(rownum+100) cc 
      from dual connect by rownum<=3
);

〜

--View Tables.
select * from tableA;
select * from tableB;

〜

--Solution.
with UnionedRows As
(
   select * from tableA 
   UNION 
   select * from tableB
)
select ID, sum(MyCount),  
   case 
      when sum(MyCount) = 12 then 'In Table A and Table B - Identical.'
      when sum(MyCount) =  2 then 'In Table A.'
      when sum(MyCount) = 13 then 'In Table A and Table B - Different.'
      when sum(MyCount) = 11 then 'In Table B.'
   end Status
from
(
   select ID, count(*) MyCount from UnionedRows group by ID
   UNION ALL
   select ID, 1 from tableA
   UNION ALL 
   select ID, 10 from tableB
) group by ID order by ID;

需要找到2个相同结构的sql表之间的差异

6 个答案: