Question

I have two tables. One (Widgets) has a list of widgets (ID, widget_name, color, etc…) and data about them.
The other one (Tests) has a list of tests run on the widgets (ID, date, info1, info2, etc…).

What I want to do is display the most recent TWO tests. I dont think i really need to use the table Widgets for this but i described it so you would know where im coming from.

I have constructed a “Totals” query that uses the MAX() function and displays the single most recent Date for each ID. I then can use this query to construct another query that displays useful information about the test that happened on that date for that widget. What i really need, though is to have the most recent two test dates for each widget.

Answer 1

If you need the two most recent tests overall, then

Select * From Tests T
Where (Select Count(*) From tests
       Where testDate > T.TestDate) < 2

If you need the two most recent tests for each Widget, then

Select * From Tests T
Where (Select Count(*) From tests
       Where WidgetId = T.WidgetId 
           And testDate > T.TestDate) < 2