sql-server - T-SQL クエリのパフォーマンス - SQL Server 2008 R2

Question

パフォーマンスの悪い SQL クエリがあります。結果セットを返すのに約 2 分かかります。

クエリを書き直すより良い方法はありますか? CTE については知っていますが、これまで使用したことはありません。

助けてください。

select 
    CustomerPK, 
    LocalID, 
    ExternalID, 
    EarnedDate, 
    QtyEarned, 
    QtyUsed, 
    Value, 
    ServerSerial, 
    LastLocationID,
    SVS.Description as Status, 
    SVS.PhraseID as StatusPhraseID,
    (select SUM(IsNull(QtyEarned,0)) - SUM(IsNull(QtyUsed,0)) 
     from SVHistory SVH2 with (NoLock) 
     where CustomerPK=18653237 and SVH2.LocalID = SVH.LocalID and SVH2.ServerSerial=SVH.ServerSerial
    ) as QtyAvail,
    AdminUserID, 
    ExpireDate, 
    PresentedCustomerID, 
    PresentedCardTypeID, 
    ResolvedCustomerID, 
    HHID, 
    Replayed, 
    ReplayedDate
from 
        SVHistory SVH with (NoLock) 
inner join 
        StoredValueStatus SVS with (NoLock) on SVS.StatusID=SVH.StatusFlag 
where 
    LastLocationID <> -8 
    and CustomerPK = 18653237 
    and SVProgramID = 112 
    and LastUpdate between '2013-05-27 00:00:00' and '2013-06-26 23:59:59' 
    and Deleted = 0 
order by 
    EarnedDate DESC, 
    LocalID, 
    ExternalID, 
    Status;