Giving out several results in one row is not really supported by SQL, which we use to generate reports. If your database is running on SQL server Express or higher edition, you can accomplish this with a query like the following example:
Select
tParent.Assetname,
Stuff(( Select ', ' + tConnected.AssetName
From tblassetRelations
Inner Join tblAssets tConnected
On tblAssetRelations.ChildAssetID = tConnected.AssetID
Where tParent.AssetID = tblAssetRelations.ParentAssetID
Order By tConnected.AssetName
For xml path('')),1,1,'')
From tblassets tParent
Order By tParent.AssetName