How to combine 2 sql custom queries into single query

Version 1

    Hello all ,I want combine 2 sql custom queries into 1 query

     

    1)select C1.CostSheetID,C2.ParentCostSheetID ,c1.StyleNo,c2.StyleNo as BuyerStyleNo from CostSheet c1 left join CostSheet c2

    on c1.CostSheetID=c2.ParentCostSheetID

     

    2)Select styleNo,CASE  WHEN [Approved]=1 then 'Approved' END as[status] from CostSheet

    UNION

    Select styleNo, CASE WHEN [SubmitforApproval]=1 then 'submitforApproval' END as[status] from CostSheet

     

    How to solve this problem???????