您可以row_number()用来做基本上相同的事情：
WITH DataToInsert AS
(
Select AgentID, Surveys, LOB,(case when day(getdate())<4 then 3 else (day(getdate())) - (Surveys*3) end) SampleSize from Current_Agent_SurveyCount_HSI Where surveys<8
)
Insert Into Survey_Source_New (LOB, CenterName, CallDate, AgentZid, TN, Ticket, RecordingID, Cycle, [TimeStamp])
select LOB, CenterName, CallDate, AgentZid, TN, Ticket, RecordingID, Cycle, [TimeStamp]
from (Select ss.LOB, CenterName, CallDate, AgentZid, TN, Ticket, RecordingID, Cycle, [TimeStamp],
row_number() over (order by newid()) as seqnum
From Survey_source_Level1 ss inner join
DataToInsert du on ss.AgentZID=du.agentID
where flag is null and du.samplesize<7
) t
where seqnum <= du.sample_size
您也许可以简化一下，但是我不知道它是否flag来自du或ss。
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