multiple MySQL queries to a single insert - mysql

Question

I'm trying to perform a number of MySQL queries and to write the results as a single line to a different database and table.
So this works
INSERT INTO bridgedb.stats (longestcall, totalmins, totalconfs)
SELECT
(SELECT MAX(duration) AS longestcall FROM bridgedb.log WHERE `start` >= NOW() - INTERVAL 1 DAY),
(SELECT SUM(duration) AS totalmins FROM bridgedb.log WHERE `start` >= NOW() - INTERVAL 1 DAY),
(SELECT COUNT(*) FROM bridgedb.log WHERE `start` >= NOW() - INTERVAL 1 DAY);
and this works
INSERT INTO bridgedb.stats (date, peakchan)
SELECT
`calldate`,
MAX(concurrent)+1 AS peakcount
FROM (
SELECT
DATE(a.calldate) as calldate,
COUNT(b.uniqueid) AS concurrent
FROM asteriskcdr.cdr AS a, asteriskcdr.cdr AS b
WHERE
a.calldate >= NOW() - INTERVAL 4 DAY
AND (
(a.calldate<=b.calldate AND (UNIX_TIMESTAMP(a.calldate)+a.duration)>=UNIX_TIMESTAMP(b.calldate))
OR (b.calldate<=a.calldate AND (UNIX_TIMESTAMP(b.calldate)+b.duration)>=UNIX_TIMESTAMP(a.calldate))
)
AND a.uniqueid>b.uniqueid
GROUP BY a.uniqueid
) AS baseview
GROUP BY calldate;
But this doesn't work
INSERT INTO bridgedb.stats (date, peakchan, longestcall, totalmins, totalconfs)
SELECT
(SELECT
`calldate`,
MAX(concurrent)+1 AS peakcount
FROM (
SELECT
DATE(a.calldate) as calldate,
COUNT(b.uniqueid) AS concurrent
FROM asteriskcdr.cdr AS a, asteriskcdr.cdr AS b
WHERE
a.calldate >= NOW() - INTERVAL 1 DAY
AND (
(a.calldate<=b.calldate AND (UNIX_TIMESTAMP(a.calldate)+a.duration)>=UNIX_TIMESTAMP(b.calldate))
OR (b.calldate<=a.calldate AND (UNIX_TIMESTAMP(b.calldate)+b.duration)>=UNIX_TIMESTAMP(a.calldate))
)
AND a.uniqueid>b.uniqueid
GROUP BY a.uniqueid
) AS baseview
GROUP BY calldate),
(SELECT MAX(duration) AS longestcall FROM bridgedb.log WHERE `start` >= NOW() - INTERVAL 1 DAY),
(SELECT SUM(duration) AS totalmins FROM bridgedb.log WHERE `start` >= NOW() - INTERVAL 1 DAY),
(SELECT COUNT(*) FROM bridgedb.log WHERE `start` >= NOW() - INTERVAL 1 DAY);
I get an error #1241 - Operand should contain 1 column(s)
Does anyone know how I can make this work for all the queries?

Answer 1

Try using session variables or abstract it away into a stored procedure, something like -
First:
SELECT
#calldate:=`calldate`,
#peakchan:=MAX(concurrent)+1
FROM (
...
) AS baseview
GROUP BY calldate
Second:
SELECT #longestcall:=MAX(duration) FROM bridgedb.log WHERE `start` >= NOW() - INTERVAL 1 DAY
Third:
SELECT #totalmins:=SUM(duration) FROM bridgedb.log WHERE `start` >= NOW() - INTERVAL 1 DAY
Fourth:
SELECT #totalconfs:=COUNT(*) FROM bridgedb.log WHERE `start` >= NOW() - INTERVAL 1 DAY;
And finally
INSERT INTO bridgedb.stats (date, peakchan, longestcall, totalmins, totalconfs)
VALUES (#calldate, #peakchan, #longestcall, #totalmins, #totalconfs)
BTW: It is not a good idea to call a column date.
EDIT
Ofcourse you need to make sure, those queries run in the same session to use session variables. This is the default when run with a single DB connection in PHP
EDIT 2
To handle periods without activity, you can
either prefix this with SELECT #calldate:=DATE(NOW() - INTERVAL 1 DAY), #peakchan:=0, #longestcall:=0, #totalmins:=0, #totalconfs:=0; (record with defaults created)
or stop after the first query, if #calldate is NULL (no record created)
EDIT 3
This works for me:
DELIMITER //
CREATE PROCEDURE ReportYesterday()
BEGIN
DECLARE calldate DATE;
DECLARE peakchan, longestcall, totalmins, totalconfs INT;
SELECT
#calldate:=`calldate`,
#peakchan:=MAX(concurrent)+1
FROM (
SELECT
DATE(a.calldate) as calldate,
COUNT(b.uniqueid) AS concurrent
FROM asteriskcdr.cdr AS a, asteriskcdr.cdr AS b
WHERE
a.calldate >= NOW() - INTERVAL 1 DAY
AND (
(a.calldate<=b.calldate AND (UNIX_TIMESTAMP(a.calldate)+a.duration)>=UNIX_TIMESTAMP(b.calldate))
OR (b.calldate<=a.calldate AND (UNIX_TIMESTAMP(b.calldate)+b.duration)>=UNIX_TIMESTAMP(a.calldate))
)
AND a.uniqueid>b.uniqueid
GROUP BY a.uniqueid) AS baseview
GROUP BY calldate
;
-- EDIT 4 IS THE FOLLOWING LINE
IF #calldate IS NOT NULL THEN
SELECT #longestcall:=MAX(duration) FROM bridgedb.log WHERE `start` >= NOW() - INTERVAL 1 DAY
;
SELECT #totalmins:=SUM(duration) FROM bridgedb.log WHERE `start` >= NOW() - INTERVAL 1 DAY
;
SELECT #totalconfs:=COUNT(*) FROM bridgedb.log WHERE `start` >= NOW() - INTERVAL 1 DAY
;
INSERT INTO bridgedb.stats (date, peakchan, longestcall, totalmins, totalconfs)
VALUES (#calldate, #peakchan, #longestcall, #totalmins, #totalconfs)
;
END IF;
END
;
//
DELIMITER ;
followed by
CALL ReportYesterday();

Answer 2

You must build a (valid) SELECT query which returns all rows. Your former SELECT was not valid. This one should work:
INSERT INTO bridgedb.stats (date, peakchan, longestcall, totalmins, totalconfs)
SELECT
`calldate`,
MAX(concurrent)+1 AS peakcount,
(SELECT MAX(duration) AS longestcall FROM bridgedb.log WHERE `start` >= NOW() - INTERVAL 1 DAY),
(SELECT SUM(duration) AS totalmins FROM bridgedb.log WHERE `start` >= NOW() - INTERVAL 1 DAY),
(SELECT COUNT(*) FROM bridgedb.log WHERE `start` >= NOW() - INTERVAL 1 DAY)
FROM (
SELECT
DATE(a.calldate) as calldate,
COUNT(b.uniqueid) AS concurrent
FROM asteriskcdr.cdr AS a, asteriskcdr.cdr AS b
WHERE
a.calldate >= NOW() - INTERVAL 1 DAY
AND (
(a.calldate<=b.calldate AND (UNIX_TIMESTAMP(a.calldate)+a.duration)>=UNIX_TIMESTAMP(b.calldate))
OR (b.calldate<=a.calldate AND (UNIX_TIMESTAMP(b.calldate)+b.duration)>=UNIX_TIMESTAMP(a.calldate))
)
AND a.uniqueid>b.uniqueid
GROUP BY a.uniqueid
) AS baseview
GROUP BY calldate;