主题：[求助]计算日期最小值问题

我现在希望计算不同列的日期最小值，这个如何处理呢下面的方式好像不行。

    Dim StartDate As Date = tbl.Compute("MIN(Math.min(min(计划开始),min(实际开始)))", "开始时间 IS NOT NULL")

嗯。是。

我后来改成这样，

但是在生成甘特图的时候会卡住

Dim Sd1 As Date = tbl.Compute("Min(计划开始)", "计划开始 IS NOT NULL")
Dim Sd2 As Date = tbl.Compute("Min(实际开始)", "实际开始 IS NOT NULL")
Dim SD3 As Date = tbl.Compute("Max(计划结束)","计划结束 IS NOT NULL")
Dim SD4 As Date = tbl.Compute("Max(实际结束)","实际结束 IS NOT NULL")
Dim StartDate As Date
Dim EndDate As Date
If sd1 <= SD2 Then
    StartDate= SD1
Else
    StartDate = SD2
End If

If sd3 >= SD4 Then
    EndDate= sd3
Else
    EndDate = sd4
End If