FineTune TSQL SQL Server -

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the below query takes lot of time, 80 minutes return 1400 results, recommendation how tune 

exec sp_executesql n'set arithignore on; select top (@solutionid)          b.[solutionid],max(b.title) title,         min(a.[status]) [status],         min(a.[audience]) audience,         max(b.productname) productname,          min(cast( datecreated datetime)) datecreated ,         min(cast( datelastmodified datetime)) datemodified,         [pc_pres_text]=replace(replace(replace((select [pc_pres_text] [data()]    [dbo.view]   a.[solutionid]=b.[solutionid] xml path('''')), ''&lt;'',''<''),''&gt;'',''>'') ,''&amp;'',''&''),          ''http://support/supp=''+b.[solutionid] primusurl    [view] b inner join [table] on b.solutionid=a.solutionid   ((@audience null , [audience] null) or [audience] @audience) , [datecreated] > @datecreated ,          ((@status null , [status] null) or [status] = @status) group b.[solutionid] order b.[solutionid]',n'@audience nvarchar(10),@datecreated datetime,@status nvarchar(9),@solutionid bigint', @audience=n'test%',@datecreated='2000-01-01 00:00:00',@status=n'test',@solutionid=500000

if passing parameter @audience , @status no need test null condition not going performance. if not output xml still have performance problem? include hint (nolock) or possibly (holdlock). not sure can (holdlock) on view - might need break down tables (holdlock). why cast on datecreated , datelastmodified - text fields in sql? if text , cast datetime why not store them datetime?


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