colonne XML comparer au serveur SQL Server 2005

Question

Je veux comparer deux colonnes XML avec plusieurs lignes dans SQL Server 2005.

structure de tableau est comme ci-dessous

CREATE TABLE [dbo].[UpdationLog](
    [LogID] [int] IDENTITY(1,1) NOT FOR REPLICATION NOT NULL, 
    [CustID] [int] NOT NULL, 
    [OldValue] [xml] NOT NULL, 
    [NewValue] [xml] NOT NULL, 
CONSTRAINT [PK_UpdationLog] PRIMARY KEY CLUSTERED 
(
    [LogID] ASC 
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY] 
) ON [PRIMARY] 
GO 

INSERT INTO [dbo].[UpdationLog] VALUES 
(1526,'<ccm CustID="1526" CustName="Teja" Address="Bangalore"/>','<ccm CustID="1526" CustName="Tejas" Address="Bengaluru"/>'), 
(1245,'<ccm CustID="1245" CustName="Abhi" Address="Andhra"/>','<ccm CustID="1245" CustName="Abhilash" Address="Andra Pradesh"/>'), 
(1145,'<ccm CustID="1145" CustName="Abhi" Address="Assam"/>','<ccm CustID="1145" CustName="Abhinandan" Address="Assam"/>') 

Je veux comparer la colonne XML OldValue et NewValue et afficher les enregistrements mis à jour.

désiré Sortie

|-------|-------------|---------------|------------ 
|CustID | Attribute |  OldValue | NewValue 
|-------|-------------|---------------|--------- 
|1526 | CustName | Teja   | Tejas 
|1526 | Address  | Bangalore  | Bengaluru 
|1245 | CustName | Abhi   | Abhilash 
|1245 | Address  | Andhra  | Andra Pradesh 
|1145 | CustName | Abhi   | Abhinandan 

http://sqlfiddle.com/#!3/cb0b3/1

Answer 1

est une façon ici. Je ne sais pas si c'est la méthode idéale, mais devrait obtenir ce que vous cherchez

SELECT CustID, 
     Attribute, 
     Max(CASE WHEN iden = 'old' THEN val END) AS OldValue, 
     Max(CASE WHEN iden = 'new' THEN val END) AS NewValue 
FROM (SELECT o.value('@CustID', 'int')   AS CustID, 
       o.value('@CustName', 'varchar(50)') AS CustName, 
       o.value('@Address', 'varchar(500)') AS Address, 
       'old'        AS iden 
     FROM UpdationLog 
       CROSS apply [OldValue].nodes('ccm') a(o) 
     UNION ALL 
     SELECT n.value('@CustID', 'int')   AS CustID, 
       n.value('@CustName', 'varchar(50)') AS CustName, 
       n.value('@Address', 'varchar(500)') AS Address, 
       'new'        AS iden 
     FROM UpdationLog 
       CROSS apply [NewValue].nodes('ccm') b(n)) a 
     CROSS apply (SELECT CustName, 'CustName' 
        UNION ALL 
        SELECT Address, 'Address') tc (val, Attribute) 
GROUP BY CustID, 
      Attribute 

Answer 2

Utilisez la requête ci-dessous.

with cte_1 
AS 
(SELECT UL.U.value('@CustID','nvarchar(100)') as CustID, 
     UL.U.value('@CustName','nvarchar(100)') as Customer, 
     UL.U.value('@Address','nvarchar(100)') as [Address], 
     NV.U.value('@CustName','nvarchar(100)') as NewCustomer, 
     NV.U.value('@Address','nvarchar(100)') as [NewAddress] 
FROM UpdationLog 
CROSS APPLY OldValue.nodes('/ccm') as UL(U) 
CROSS APPLY NewValue.nodes('/ccm') as NV(U)) 

SELECT CustID,'CustName' as Attribute,Customer OldValue,NewCustomer NewValue 
FROM cte_1 
UNION ALL 
SELECT CustID,'Address' as Attribute,[Address] OldValue,[NewAddress] NewValue 
FROM cte_1 
ORDER BY CustID 

Answer 3

Une autre façon avec l'utilisation de local-namefunction pour obtenir le nom d'attribut:

SELECT CustID, 
     CAST(t.c.query('local-name(.)') as nvarchar(max)) Attribute, 
     t.c.value('.','nvarchar(max)') OldValue, 
     u.d.value('.','nvarchar(max)') NewValue 
FROM UpdationLog 
CROSS APPLY OldValue.nodes('//@*') as t(c) 
CROSS APPLY NewValue.nodes('//@*') as u(d) 
WHERE 
    CAST(t.c.query('local-name(.)') as nvarchar(max)) = CAST(u.d.query('local-name(.)') as nvarchar(max)) 
    AND CAST(t.c.query('local-name(.)') as nvarchar(max)) != 'CustID' 
    AND t.c.value('.','nvarchar(max)') != u.d.value('.','nvarchar(max)') 

Sortie:

CustID Attribute OldValue NewValue 
1526 CustName Teja  Tejas 
1526 Address  Bangalore Bengaluru 
1245 CustName Abhi  Abhilash 
1245 Address  Andhra  Andra Pradesh 
1145 CustName Abhi  Abhinandan