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can this sql statement be improved, it has highest avage CPU time

Posted By:      Posted Date: October 25, 2010    Points: 0   Category :Sql Server

insert into #APIMPORT_Transbatch(sort_key, subsys_bat, desc1, source)   select distinct sort_key, subsys_bat, desc1, 'AP' from apimport as I with (nolock)   where yrprd>= right('0'+cast(cast(left(@yrprd,2) as integer)-1 as varchar(2)),2)     AND (@FUTUREPOST=1 or yrprd<=@yrprd) --do not import future dated    AND fact_code<>'100'    and not exists(select a.sort_key from apexport_audit as a with (nolock)      where a.exportdatetime is not null and ltrim(a.sort_key)=ltrim(i.sort_key) and ltrim(a.subsys_bat)=ltrim(i.subsys_bat)      and ltrim(a.desc1)=ltrim(i.desc1))    

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