sql server - SQL TOP and Join challenge -

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i have problem top , join in sql.

i have 2 tables inventtable , ikmtechspecprod.

inventtable contains products have.

ikmtechspecprod contains technical specifications products.

there can many technical specifications single product. want export products , 12 first technical specs each product, , want listed on 1 line per product

example: 

itemid, itemname, spec1name, spec1value, spec2name, spec2value, spec3name, spec3 value.....

i have tried sql query below, gives me:

itemid, itemname, spec1name, spec2value itemid, itemname, spec2name, spec2value  itemid, itemname, spec3name, spec3value

query:

select      invent.itemid, itemname,      [techspec].name, [techspec].value      [inventtable] invent cross apply      (select top 12           [ikmtechspecprod].name, ikmtechspecprod.value      [ikmtechspecprod]      [ikmtechspecprod].itemid = invent.itemid) techspec

anyone know how solve this?

you can write query as:

 select distinct     t2.itemid,     stuff     (         (             select top 12 ',' + specifications             @ikmtechspecprod t1             t1.itemid = t2.itemid             order specifications             xml path('')         ), 1, 1, ''     ) specs     @inventtable t2

demo


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