时间间隔内的SQL

Question

I have the below query which will query from a date range and fixed timing on the appointed devices. How could I modify the query so that the time within a + - 10minutes. For example if user chosen 4:00pm and the query shall cater for 3:50pm until 4:10pm on every single day within the date range.

SELECT Timestamp, AVG(Value) 
FROM STATIC_SENSOR_READINGS 
WHERE 
Node_ID IN ($sdNodeList) AND  
Modality = 'Temperature' AND 
Timestamp BETWEEN ? AND ? AND  // This will be the date range.
date_format(`Timestamp`, '%H:%i') = '$time'  // Specific time here
GROUP BY Timestamp

Answer 1

To check timestamps are "approximately" equal in mysql, you can use the TIMESTAMPDIFF() function.

In your example, you need something like:

SELECT Timestamp, AVG(Value) 
FROM STATIC_SENSOR_READINGS 
WHERE 
Node_ID IN ($sdNodeList) AND  
Modality = 'Temperature' AND 
Timestamp BETWEEN ? AND ? AND  // This will be the date range.
ABS(TIMESTAMPDIFF(MINUTES, Timestamp, '$time')) < 10 
GROUP BY Timestamp

You may have to adjust time/timestamp formats to suit your needs.