copy specific row from multiple table into another table in sql - mysql

Question

I want to copy a specific row from tables temperature, rules and schedule to stats table.
In temperature table, I want the latest temperature which is 18.6
mysql> SELECT * FROM currenttemp ORDER BY `timestamp` DESC limit 10 ;
+---------------------+-----------------+-------------+----------+----------+
| timestamp | sensor | currenttemp | humidity | pressure |
+---------------------+-----------------+-------------+----------+----------+
| 2017-03-25 15:28:03 | sensor-1stFloor | 18.6 | 49.85 | 1021.26 |
| 2017-03-25 15:27:03 | sensor-1stFloor | 18.7 | 49.81 | 1021.26 |
| 2017-03-25 15:26:03 | sensor-1stFloor | 18.8 | 49.82 | 1021.26 |
| 2017-03-25 15:25:03 | sensor-1stFloor | 18.9 | 49.85 | 1021.22 |
| 2017-03-25 15:24:03 | sensor-1stFloor | 18.99 | 49.83 | 1021.21 |
| 2017-03-25 15:23:03 | sensor-1stFloor | 18.61 | 49.85 | 1021.18 |
| 2017-03-25 15:22:02 | sensor-1stFloor | 18.62 | 49.8 | 1021.3 |
| 2017-03-25 15:21:02 | sensor-1stFloor | 18.63 | 49.82 | 1021.39 |
| 2017-03-25 15:20:03 | sensor-1stFloor | 18.61 | 49.82 | 1021.28 |
| 2017-03-25 15:19:03 | sensor-1stFloor | 18.62 | 49.82 | 1021.37 |
+---------------------+-----------------+-------------+----------+----------+
In rules table, I want the targettemp for schedule 4 which is 40
mysql> SELECT * FROM rules limit 10 ;
+----+----------+--------+------------+
| id | schedule | sensor | targettemp |
+----+----------+--------+------------+
| 1 | 4 | 1 | 40 |
| 2 | 5 | 1 | 5 |
+----+----------+--------+------------+
In schedule table, I want the endtime for id 4 which is 10:00:00
mysql> SELECT * FROM schedules limit 10 ;
+----+--------------+-----------+--------------+-----------+----------+---------+------------+--------+
| id | friendlyname | dayofweek | pretimestart | timestart | endtime | enabled | targettemp | sensor |
+----+--------------+-----------+--------------+-----------+----------+---------+------------+--------+
| 4 | test | 1111110 | 00:00:00 | 00:00:00 | 10:00:00 | 1 | 30 | 1 |
| 5 | sun | 0000001 | 00:00:00 | 00:00:00 | 20:00:00 | 0 | 0 | |
+----+--------------+-----------+--------------+-----------+----------+---------+------------+--------+
I then want to insert these data to the stats table
currenttemp which is 18.6
targettemp for schedule 4 which is 40
endtime for id 4 which is 10:00:00
the timestamp is done automatically
state will be between ON and OFF
please look at the 1st row in stats table as example from the data copied from the above tables.
mysql> SELECT * FROM stats limit 10 ;
+---------------------+-------------+------------+----------+-------+
| timestamp | currenttemp | targettemp | endtime | state |
+---------------------+-------------+------------+----------+-------+
| 2017-03-25 15:41:46 | 18.6 | 40 | 10:00:00 | OFF |
| 2017-03-19 16:53:05 | 16.83 | 5 | 00:00:00 | OFF |
| 2017-03-19 16:54:14 | 16.83 | 40 | 00:00:00 | ON |
| 2017-03-19 20:04:07 | 16.58 | 40 | 00:00:00 | ON |
| 2017-03-19 20:04:15 | 16.58 | 5 | 00:00:00 | OFF |
| 2017-03-19 20:06:29 | 16.58 | 5 | 00:00:00 | OFF |
| 2017-03-19 20:34:28 | 16.54 | 5 | 00:00:00 | OFF |
| 2017-03-19 20:34:56 | 16.54 | 5 | 00:00:00 | OFF |
| 2017-03-19 20:35:26 | 16.54 | 40 | 00:00:00 | ON |
| 2017-03-19 20:38:05 | 16.54 | 40 | 00:00:00 | ON |
+---------------------+-------------+------------+----------+-------+
I will have 2 queries. One with the state OFF and one with the state ON.

Answer 1

Your question is unclear because the relationship between temperature and the other tables is unclear. Let me assume that there is a join key to schedules. If so, the query you want would look something like this:
INSERT INTO stats (currenttemp, targettemp, endtime)
SELECT t.temperature, r.targettemp, s.timeend
FROM schedules s INNER JOIN
rules r
ON s.id = r.schedule INNER JOIN
temperature t
ON t.schedule = s.id
WHERE s.id = 4 AND
t.timestamp = (SELECT MAX(t2.timestamp)
FROM temperature t2
WHERE t2.schedule = t.schedule
);

Answer 2

this seems to work
INSERT INTO stats (currenttemp,targettemp,endtime,state)
SELECT
temperature,r.targettemp,s.timeend,'OFF'
FROM
schedules s
INNER JOIN rules r
ON s.id = r.schedule
INNER JOIN temperature
WHERE timestamp = (SELECT MAX(timestamp) FROM temperature)
AND s.id = 4
i can see now in my stats table
mysql> SELECT * FROM stats limit 10 ;
+---------------------+-------------+------------+----------+-------+
| timestamp | currenttemp | targettemp | endtime | state |
+---------------------+-------------+------------+----------+-------+
| 2017-04-06 17:58:05 | 19.53 | 40 | 10:00:00 | OFF |
+---------------------+-------------+------------+----------+-------+