I have the following two querydefs. Here is the SQL;
qry1
SELECT [dtFind], tblData.dtReading, tblData.dblValue
FROM tblData
WHERE DateDiff("n",[dtReading],[dtFind]) Between 1 And CInt([intMins]);
qry2
SELECT [dtFind], tblData.dtReading, tblData.dblValue
FROM tblData
WHERE dtReading Between...