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3#

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发表于 2007-3-21 19:53:00
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2的意思就是在窗体里只显示结果但不存储到表,是在窗体的设计视图中的recordsource里加计算公式快还是在查询纪录时在sql语句里用公式那个快如meas_sql = "SELECT round(Avg([Ul_V]),2) & iif(IsNull(StDev([Ul_V])),'','±' & round(StDev([Ul_V]),2)) as Meas_ul, " _
' & " round(Avg([P_W]),2) & iif(IsNull(StDev([P_W])),'','±' & round(StDev([P_W]),2)) AS Meas_P, " _
' & " round(Avg([Phi_lm]),2) & iif(IsNull(StDev([Phi_lm])),'','±' & round(StDev([Phi_lm]),2)) AS Meas_phi, " _
' & " round(Avg([phi_lm]/[P_W]),2) & iif(IsNull(StDev([phi_lm]/[P_W])),'','±' & round(StDev([phi_lm]/[P_W]),2)) AS [Meas_eta], " _
' & " round(Avg([x]),4) & iif(IsNull(StDev([x])),'','±' & round(StDev([x]),4)) AS Meas_x, " _
' & " round(Avg([y]),4) & iif(IsNull(StDev([y])),'','±' & round(StDev([y]),4)) AS Meas_y, " _
' & " round(Avg([T_K]),2) & iif(IsNull(StDev([T_K])),'','±' & round(StDev([T_K]),2)) AS [Meas_T], " _
' & " First(tdtaBenchHaloDaten.Calc_EKn) AS Ekn, " _
' & " round(Avg([Reflektor_Halbwertswinkel]),2) & iif(IsNull(StDev([Reflektor_Halbwertswinkel])),'','±' & round(StDev([Reflektor_Halbwertswinkel]),2)) AS Meas_HW, " _
' & " round(Avg([Reflektor_MaxLichtstaerke]),2) & iif(IsNull(StDev([Reflektor_MaxLichtstaerke])),'','±' & round(StDev([Reflektor_MaxLichtstaerke]),2)) AS Meas_Imax, " _
' & "fctEstimatedLD([tdtaBenchHaloDaten].[idBenchDaten]) AS Estim_LD, " _
' & " Count([tdtaBenchHaloMesswert].[Ul_V]) AS [Anzahl von LpNr], [tdtaBenchHaloMesswert].[Alter_h] FROM tkeyBench " _
' & "LEFT JOIN ((tdtaBenchHaloDaten LEFT JOIN tkeyBenchHaloLampe ON [tdtaBenchHaloDaten].[idBenchDaten]=[tkeyBenchHaloLampe].[idBenchDaten]) LEFT JOIN tdtaBenchHaloMesswert " _
' & "ON [tkeyBenchHaloLampe].[idLp]=[tdtaBenchHaloMesswert].[idLp]) ON [tkeyBench].[idBench]=[tdtaBenchHaloDaten].[idBench] " _
' & " where tdtaBenchHaloDaten.idBenchDaten=" + Str$(rs_clone!idBenchDaten) + " AND (tdtaBenchHaloMesswert.Ul_V)>0 GROUP BY [tdtaBenchHaloMesswert].[Alter_h],tdtaBenchHaloMesswert.Alter_h, fctEstimatedLD([tdtaBenchHaloDaten].[idBenchDaten]) " _
' & "ORDER BY [tdtaBenchHaloMesswert].[Alter_h] "
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