XML columns compare in SQL Server - sql

Question

I have got 3 columns:
[OldContent] [xml] NULL
[NewContent] [xml] NULL
[OldContent] [xml] NULL
I want to compare the data in two columns. I want to write the results into the third column ([OldContent])
How can I do it in SQL Server?
[OldContent] [xml] NULL, in
Value
<row GUEST_ID="13" GUEST_NAME="VEDAT" GUEST_SURNAME="PALA" ADRESS="IZMIR" />
[NewContent] [xml] NULL, in value
<row GUEST_ID="13" GUEST_NAME="VEDAT35" GUEST_SURNAME="PALA" ADRESS="IZMIR" CITY="DR" CITY_CODE="35" />
I want to write the value in it.
[UpdateContent] [xml] NULL
<row GUEST_NAME="VEDAT35 CITY="DR" CITY_CODE="35" />
I need a procedure to compare XML column values.

Answer 1

It is quite easy to get the data out of XML. Then you may compare your data "as ever". The result you can write out into a new XML with "FOR XML".
Try it like this:
DECLARE #myXML XML=
'<rows>
<row GUEST_ID="13" GUEST_NAME="VEDAT35" GUEST_SURNAME="PALA" ADRESS="IZMIR" CITY="DR" CITY_CODE="35" />
<row GUEST_ID="14" GUEST_NAME="TestGuestName" GUEST_SURNAME="TestSurname" ADRESS="TestAddr" CITY="TestCity" CITY_CODE="11" />
</rows>';
--This is how you retrieve the data
SELECT x.y.value('#GUEST_ID','int')
,x.y.value('#GUEST_NAME','varchar(max)')
,x.y.value('#GUEST_SURNAME','varchar(max)')
,x.y.value('#ADRESS','varchar(max)')
,x.y.value('#CITY','varchar(max)')
,x.y.value('#CITY_CODE','int')
FROM #myXML.nodes('/rows/row') AS x(y)
--This is how you create a new XML with your data
SELECT 13 AS [#GUEST_ID]
,'NewName' AS [#GUEST_NAME]
,'NewSurname' AS [#GUEST_SURNAME]
,'NewAddr' AS [#GUEST_ADRESS]
,'NewCity' AS [#CITY]
,12 AS [#CITY_CODE]
FOR XML PATH('row'),ROOT('rows')

Answer 2

samples table
USE [DENEME]
GO
/****** Object: Table [dbo].[GUESTS] Script Date: 17.07.2015 22:19:35 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
SET ANSI_PADDING ON
GO
CREATE TABLE [dbo].[GUESTS](
[GUEST_ID] [int] IDENTITY(1,1) NOT NULL,
[GUEST_NAME] [varchar](50) NULL,
[GUEST_SURNAME] [varchar](50) NULL,
[ADRESS] [varchar](100) NULL,
[CITY] [varchar](50) NULL,
[CITY_CODE] [varchar](10) NULL,
[COUNTRY] [varchar](50) NULL,
[STATUS] [varchar](20) NULL,
[COMMENT] [nvarchar](max) NULL,
PRIMARY KEY CLUSTERED
(
[GUEST_ID] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY] TEXTIMAGE_ON [PRIMARY]
GO
SET ANSI_PADDING OFF
GO
USE [DENEME]
GO
/****** Object: Trigger [dbo].[iudt_AutoAuditChanges] Script Date: 17.07.2015 22:20:11 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
ALTER TRIGGER [dbo].[iudt_AutoAuditChanges]
ON [dbo].[GUESTS]
AFTER INSERT,DELETE,UPDATE
AS
BEGIN
SET NOCOUNT ON;
declare #AuditType char(1) /* BEN EKELEDM*/
Declare #v_AuditID bigint
/******************************/
if exists (select * from inserted)
if exists (select * from deleted)
SET #AuditType = 'U'
else
SET #AuditType = 'I'
else
SET #AuditType = 'D'
/******************************/
IF OBJECT_ID('dbo.AutoAudit','U') IS NULL BEGIN
CREATE TABLE [dbo].[AutoAudit]
( [AuditID] bigint identity,
[AuditType] Char(1),
[AuditDate] DateTime,
[AuditUserName] varchar(128),
[TableName] varchar(128) NULL,
[OldContent] XML NULL,
[NewContent] XML NULL,
[Updatedcontent] XML NULL
)
ALTER TABLE dbo.AutoAudit ADD CONSTRAINT
PK_AutoAudit PRIMARY KEY CLUSTERED
(
[AuditID]
) WITH( STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
CREATE NONCLUSTERED INDEX [idx_AutoAudit_TableName_AuditDate] ON [dbo]. [AutoAudit]
( [TableName] ASC,
[AuditDate] ASC
)WITH (STATISTICS_NORECOMPUTE = OFF, SORT_IN_TEMPDB = OFF, IGNORE_DUP_KEY = OFF, DROP_EXISTING = OFF, ONLINE = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
END
Select * Into #AuditDeleted from deleted
Select * Into #AuditInserted from inserted
While (Select COUNT(*) from #AuditDeleted) > 0 OR (Select COUNT(*) from #AuditInserted) > 0
Begin
INSERT INTO [dbo].[AutoAudit]
( [AuditDate],[AuditType], [AuditUserName], [TableName], [OldContent], [NewContent])
SELECT
GETDATE(),
#AuditType,
SUSER_NAME(),
[TableName]=object_name([parent_obj]),
[OldContent]=CAST((SELECT TOP 1 * FROM #AuditDeleted D FOR XML RAW) AS xml),
[NewContent]=CAST((SELECT TOP 1 * FROM #AuditInserted I FOR XML RAW) AS xml)
FROM sysobjects
WHERE
[xtype] = 'tr'
and [name] = OBJECT_NAME(##PROCID)
Set #v_AuditID = SCOPE_IDENTITY()
Delete from AutoAudit
Where AuditID = #v_AuditID
AND Convert(varchar(max),oldContent) = Convert(varchar(max),NewContent)
Delete top(1) from #AuditDeleted
Delete top(1) from #AuditInserted
End
END
I am writing log program.
OldContent:
<row GUEST_ID="19" GUEST_NAME="VEDAT" GUEST_SURNAME="PALA" ADRESS="TURKEY" CITY="TOKAT" CITY_CODE="60" />
newcontent:
<row GUEST_ID="19" GUEST_NAME="VEDAT60" GUEST_SURNAME="PALA" ADRESS="TURKEY" CITY="TOKAT" CITY_CODE="60" STATUS="other" COMMENT="uptaded fields" />
Expected results:
UptadedContent:
<row GUEST_NAME="VEDAT60" STATUS="other" COMMENT="uptaded fields" />
I want compare procedure..
Look this picture
IMG]http://i59.tinypic.com/24nfibl.png[/IMG]