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declare @MaxRun_Times_flu int
select @MaxRun_Times_flu = 5
declare @cur_flu cursor for select top (@MaxRun_Times_flu) fname from #tmp_file
declare @MaxRun_Times_flu int
select @MaxRun_Times_flu = 5
declare @cur_flu cursor for
EXEC('select top '+LTRIM(@MaxRun_Times_flu )+' fname from #tmp_file ')