mysql retrieve data from a range of time from table [closed] - mysql

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-this is the table of picture i want to retrieve datas from
I need two queries.
the first one is to get the actionNo of the latest stopTime before the current time.
the second query is to get the actionNo if the latest actionTime before the current time.
Example:
If the current time was: 00:46:20
the first query is to get actionNo 9 (stoptime: 00:45:00)
the second query is to get actionNo 8 (actiontime: 00:41:30)
-this is eg of range to get data picture

Answer 1

SELECT MAX(id) FROM timestuff WHERE `actionTime` < CURTIME();
SELECT MAX(id) FROM timestuff WHERE `stopTime` < CURTIME();
This gets you the latest id of the action/stoptime before the current time, will work if your table always is in the order as you have shown (that means, ids display the chronology of your time values - which isn't the case in your data as I just noticed).
For your case: you can take another step and add a inner join on the time closest to the current time and then look up the id of that data.
First query: For the latest stopTime before the current time:
SELECT
timestuff.id
FROM
(
SELECT
MAX(stopTime) AS maxTime
FROM
timestuff
WHERE
`stopTime` < CURTIME()
) AS time
INNER JOIN timestuff ON timestuff.`stopTime` = time.maxTime;
Second query: For the first actionTime after the current time:
SELECT
timestuff.id
FROM
(
SELECT
MIN(actionTime) AS minTime
FROM
timestuff
WHERE
`actionTime` > CURTIME()
) AS time
INNER JOIN timestuff ON timestuff.`actionTime` = time.minTime;