I have the following value in an XML data type column of a SQL Server table:
<feed>
<schedule>
<arrivalSla dayOfWeek="monday" addDays="1" time="02:00:00"/>
<arrivalSla dayOfWeek="tuesday" addDays="1" time="02:00:00"/>
<arrivalSla dayOfWeek="wednesday" addDays="1" time="02:00:00"/>
<arrivalSla dayOfWeek="thursday" addDays="1" time="02:00:00"/>
<arrivalSla dayOfWeek="friday" addDays="3" time="12:45:00"/>
</schedule>
<assetCode value="FI" />
</feed>
I want to update the time attribute where dayOfWeek="friday" to "11:00:00". I have tried various ways, including the following, but get an error of
XQuery [learnTheXML.xnlColumn.modify()]: The target of 'replace' must be at most one node, found 'element(arrivalSla,xdt:untyped) *'
UPDATE learnTheXML
SET xmlColumn.modify('replace value of (/feed/schedule/arrivalSla[#dayOfWeek="friday"]) with "11:00:00"')
WHERE id = 1
What am I doing wrong?
You still need to provide a singleton value to update and also you need to tell it you want to update (presumably) the value of time:
UPDATE learnTheXML
SET xmlColumn.modify('replace value of (/feed/schedule/arrivalSla[#dayOfWeek="friday"]/#time)[1] with "11:00:00"')
WHERE id = 1;
Related
I have read dozens of posts and have tried numerous SQL queries to try and get this figured out. Sadly, I'm not a SQL expert (not even a novice) nor am I an XML expert. I understand basic queries from SQL, and understand XML tags, mostly.
I'm trying to query a database table, and have the data show a list of values from a column that contains XML. I'll give you an example of the data. I won't burden you with everything I have tried.
Here is an example of field inside of the column I need. So this is just one row, I would need to query the whole table to get all of the data I need.
When I select * from [table name] it returns hundreds of rows and when I double click in the column name of 'Document' on one row, I get the information I need.
It looks like this:
<code_set xmlns="">
<name>ExampleCodeTable</name>
<last_updated>2010-08-30T17:49:58.7919453Z</last_updated>
<code id="1" last_updated="2010-01-20T17:46:35.1658253-07:00"
start_date="1998-12-31T17:00:00-07:00"
end_date="9999-12-31T16:59:59.9999999-07:00">
<entry locale="en-US" name="T" description="Test1" />
</code>
<code id="2" last_updated="2010-01-20T17:46:35.1658253-07:00"
start_date="1998-12-31T17:00:00-07:00"
end_date="9999-12-31T16:59:59.9999999-07:00">
<entry locale="en-US" name="Z" description="Test2" />
</code>
<displayExpression>[Code] + ' - ' + [Description]</displayExpression>
<sortColumn>[Description]</sortColumn>
</code_set>
Ideally I would write it so it runs the query on the table and produces results like this:
Code Description
--------------------
(Data) (Data)
Any ideas? Is it even possible? The dozens of things I have tried that are always posted in stack, either return Nulls or fail.
Thanks for your help
Try something like this:
SELECT
CodeSetId = xc.value('#id', 'int'),
Description = xc.value('(entry/#description)[1]', 'varchar(50)')
FROM
dbo.YourTableNameHere
CROSS APPLY
YourXmlColumn.nodes('/code_set/code') AS XT(XC)
This basically uses the built-in XQuery to get an "in-memory" table (XT) with a single column (XC), each containing an XML fragment that represents each <code> node inside your <code_set> root node.
Once you have each of these XML fragments, you can use the .value() XQuery operator to "reach in" and grab some pieces of information from it, e.g. it's #id (attribute by the name of id), or the #description attribute on the contained <entry> subelement.
The following query will read the xml field in every row, then shred certain values into a tabular result set.
SELECT
-- get attribute [attribute name] from the parent node
parent.value('./#attribute name','varchar(max)') as ParentAttributeValue,
-- get the text value of the first child node
child.value('./text()', 'varchar(max)') as ChildNodeValueFromFirstChild,
-- get attribute attribute [attribute name] from the first child node
child.value('./#attribute name', 'varchar(max)') as ChildAttributeValueFromFirstChild
FROM
[table name]
CROSS APPLY
-- create a handle named parent that references that <parent node> in each row
[xml field name].nodes('//xpath to parent name') AS ParentName(parent)
CROSS APPLY
-- create a handle named child that references first <child node> in each row
parent.nodes('(xpath from parent/to child)[0]') AS FirstChildNode(child)
GO
Please provide the exact values you want to shred from the XML for a more precise answer.
From my ASP.Net application I am generating XML and pass it as input data to stored procedure as below,
<Aprroval>
<Approve>
<is_nb_approved>false</is_nb_approved>
<is_approved>true</is_approved>
<is_submitted>true</is_submitted>
<UserId>35</UserId>
<ClientId>405</ClientId>
<taskDate>2015-05-23T00:00:00</taskDate>
</Approve>
<Approve>
<is_nb_approved>false</is_nb_approved>
<is_approved>true</is_approved>
<is_submitted>true</is_submitted>
<UserId>35</UserId>
<ClientId>405</ClientId>
<taskDate>2015-05-24T00:00:00</taskDate>
</Approve>
</Approval>
And below is my stored procedure,
create procedure UpdateTaskStatus(#XMLdata XML)
AS
UPDATE [TT_TaskDetail]
SET
is_approved=Row.t.value('(is_approved/text())[1]','bit'),
is_nb_approved=Row.t.value('(is_nb_approved/text())[1]','bit'),
is_submitted=Row.t.value('(is_submitted/text())[1]','bit')
FROM #XMLdata.nodes('/Aprroval/Aprrove') as Row(t)
WHERE user_id = Row.t.value('(UserId/text())[1]','int')
AND client_id = Row.t.value('(ClientId/text())[1]','int')
AND taskdate = Row.t.value('(taskDate/text())[1]','date')
But when I execute this stored procedure, I am getting return value as 0 and no record is getting updated. Any suggestions welcome.
You have 2 errors in your xml:
First is nonmatching root tags.
Second, more important, you are quering nodes('/Aprroval/Aprrove'), but inner tag is Approve not Aprrove.
Fiddle http://sqlfiddle.com/#!3/66b08/3
Your outer tags do not match. Your opening tag says, "Aprroval" instead of "Approval". Once I corrected that, I was able to select from the XML without issue.
I am attempting to add an attribute to a node in an XML column in SQL Server.
UPDATE
TableName
SET Metadata.modify('
insert attribute MyAttribute{"01b9cd0b-bfed-436f-bc58-57d2fddd9211"}
into (Root/Collection/Item[#No="360"][1])
')
WHERE
TableName.Id = 1
I get the following error...
Msg 2226, Level 16, State 1, Line 4 XQuery
[TableName.Metadata.modify()]: The target of 'insert' must be a single
node, found 'element(Item,xdt:untyped) *'
But I thought my selection would return a single item, given the [1]
Stupid XQuery! (Or possibly me).
You need to place the [1] outside of the brackets:
into (Root/Collection/Item[#No="360"][1])
Should be
into (Root/Collection/Item[#No="360"])[1]
I am trying to use XQuery in SQL Server 2005 to update xml saved in a column. Here is a sample of the data I need to update.
<Length>3</Length>
<Width>5</Width>
<Depth>6</Depth>
<Area xsi:nil="true" />
<Volume xsi:nil="true" />
I need to set the area and volume to values from a different table. I am creating a CTE for the update. There is other logic that I have omitted, but I have verified that the CTE contains the correct data for the update:
;with Volume (DocumentID, Volume) As
(
Select DocumentID, Volume from tbl
)
and I am using the following XQuery SQL statement to try to update the table.
UPDATE tbl_Archive
SET XML.modify(' declare namespace x="http://www.redacted.com";
replace value of (/x:Document/x:Volume/text())[1]
with sql:column("Volume.Volume")')
From Volume where volume.documentID = tbl_Archive.DocumentID
I get 1 row affected, but when I look at the XML it hasn't changed, and I can't figure out what needs to be fixed to make it work. The node is untyped, if that makes any difference.
Update wont work if there's no text to replace.. the XPath /x:Document/x:Volume/text())[1] will return an empty set.
Try insert...
UPDATE tbl_Archive
SET XML.modify(' declare namespace x="http://www.redacted.com";
insert text {sql:column("Volume.Volume")}
as first into (/x:Document/x:Volume)[1]')
From Volume where volume.documentID = tbl_Archive.DocumentID
..you'll then need to remove the nil="true" attribute..
Something like this maybe..
update tbl_Archive set XML.modify('delete /*:Document/*:Volume[text()]/#xsi:nil')
I have something like the following XML in a column of a table:
<?xml version="1.0" encoding="utf-8"?>
<container>
<param name="paramA" value="valueA" />
<param name="paramB" value="valueB" />
...
</container>
I am trying to get the valueB part out of the XML via TSQL
So far I am getting the right node, but now I can not figure out how to get the attribute.
select xmlCol.query('/container/param[#name="paramB"]') from LogTable
I figure I could just add /#value to the end, but then SQL tells me attributes have to be part of a node. I can find a lot of examples for selecting the child nodes attributes, but nothing on the sibling atributes (if that is the right term).
Any help would be appreciated.
Try using the .value function instead of .query:
SELECT
xmlCol.value('(/container/param[#name="paramB"]/#value)[1]', 'varchar(50)')
FROM
LogTable
The XPath expression could potentially return a list of nodes, therefore you need to add a [1] to that potential list to tell SQL Server to use the first of those entries (and yes - that list is 1-based - not 0-based). As second parameter, you need to specify what type the value should be converted to - just guessing here.
Marc
Depending on the the actual structure of your xml, it may be useful to put a view over it to make it easier to consume using 'regular' sql eg
CREATE VIEW vwLogTable
AS
SELECT
c.p.value('#name', 'varchar(10)') name,
c.p.value('#value', 'varchar(10)') value
FROM
LogTable
CROSS APPLY x.nodes('/container/param') c(p)
GO
-- now you can get all values for paramB as...
SELECT value FROM vwLogTable WHERE name = 'paramB'