SELECT DC_GRP.dc_grp, DC_GRPX.reqt_id,
AVG(RESULTS.[var]) AS Average, STDEV(RESULTS.[var]) AS StdDev
FROM RESULTS INNER JOIN...
目前我正在从 RESULTS 中提取所有var字段,但我只需要获取最近的 100 个。我怎样才能只调用该 AVG( ) 调用中最近的 100 个?
SELECT DC_GRP.dc_grp, DC_GRPX.reqt_id,
AVG(RESULTS.[var]) AS Average, STDEV(RESULTS.[var]) AS StdDev
FROM RESULTS INNER JOIN...
目前我正在从 RESULTS 中提取所有var字段,但我只需要获取最近的 100 个。我怎样才能只调用该 AVG( ) 调用中最近的 100 个?