Update Temp table to Insert node in XML data using SQL

debugcn 投稿 Dev

Rick

My question is related to this question. However I am writing a clean scenario on which I need help. I am a beginner in SQL and pardon me If I'm incorrect anywhere.

I have a procedure(huge on. replicating a small sample here) that spits out bunch of XMLs. On my second procedure, based on Parametric condition I have to insert a node in the XML for every CID and do a final select. I am adding a Rextester link below:

UPDATED LINK: http://rextester.com/EFGQB11125

Current output:

  <Main>
    <ID>1001</ID>
    <details>
        <name>John</name>
        <age>12</age>
    </details>
</Main>
<Main>
    <ID>1002</ID>
    <details>
        <name>Rick</name>
        <age>19</age>
    </details>
</Main>
<Main>
    <ID>1003</ID>
    <details>
        <name>Diane</name>
        <age>25</age>
    </details>
</Main>
<Main>
    <ID>1004</ID>
    <details>
        <name>Kippy</name>
        <age>26</age>
    </details>
</Main>

Desired output:

When @type = 'N'/'U' then

    <Main>
    <ID>1001</ID>
    <type>N</type>
    <details>
        <name>John</name>
        <age>12</age>
    </details>
</Main>
<Main>
    <ID>1002</ID>
    <type>U</type>
    <details>
        <name>Rick</name>
        <age>19</age>
    </details>
</Main>
<Main>
    <ID>1003</ID>
    <type>N</type>
    <details>
        <name>Diane</name>
        <age>25</age>
    </details>
</Main>
<Main>
    <ID>1004</ID>
    <type>N</type>
    <details>
        <name>Kippy</name>
        <age>26</age>
    </details>
</Main>

So, for every CID, based on @type values, a node should be inserted with that value. Any help?!

(Sorry for being redundant by any chance)

LukStorms

The trick used in the example below uses a bit of Dynamic Sql magic.

Basically building 1 big SQL with all the updates for each ID.

declare @Sql varchar(max); 

select @Sql = concat(@Sql,'UPDATE #final SET xml_data.modify(''insert <type>',ctype,'</type> after (/Main/ID)[text()="',cid,'"][1]'');',CHAR(13),CHAR(10))
from #tbl;

-- select @Sql as xml_modify_sqls;
exec(@Sql);

select * from #final;

And here's some SQL to setup the temporary tables with the sample data:

IF OBJECT_ID('tempdb..#tbl') IS NOT NULL DROP TABLE #tbl;
create table #tbl (cid int, ctype varchar(5));
IF OBJECT_ID('tempdb..#cdetails') IS NOT NULL DROP TABLE #cdetails;
create table #cdetails (cid int, name varchar(5), age int);
IF OBJECT_ID('tempdb..#final') IS NOT NULL DROP TABLE #final;
create table #final (xml_data xml);
insert into #tbl (cid, ctype) values
(1001,'N'), (1002,'U'), (1003,'N'), (1004,'N');
insert into #cdetails (cid, name, age) values
(1001,'John',12), (1002,'Rick',19), (1003,'Diane',25), (1004,'Kippy',26);
insert into #final (xml_data)
select xml_data
from (
    select 
    cd1.cid as ID,
    -- type = t.ctype as type,
    details =
    (
        select 
         cd.name,
         cd.age
        from #cdetails cd
        where cd.cid = cd1.cid
        For XML Path(''), Type
    )
    from #cdetails cd1
    join #tbl t on cd1.cid = t.cid
    For XML Path('Main')
) q(xml_data);
select * from #final;