I am trying to join two tables tblN1
and tblN2
to get the number of total access for user and update the third table tblNCC
without success because I have error:
[Err] 1054 - Unknown column 't.UserN1' in 'on clause'
I don't understand this error ... the column t.UserN1
is in Select sql query.
Maybe the problem is the Union All
syntax ?
My code below, please help me.
Thank you so much in advance.
UPDATE tblNCC AS CC
JOIN (
SELECT
sum(total) AS Total
FROM
(
SELECT
COUNT(*) AS Total,
UserN1
FROM
`tblN1`
WHERE
UserN1 IN ('7047505')
AND dateN1 BETWEEN MAKEDATE(YEAR(CURDATE()), 1)
AND CURDATE()
UNION ALL
SELECT
COUNT(*) AS Total,
UserN2
FROM
`tblN2`
WHERE
UserN2 ('7047505')
AND dateN2 BETWEEN MAKEDATE(YEAR(CURDATE()), 1)
AND CURDATE()
) AS t
) AS q ON t.UserN1 = CC.UserNcc
SET CC.Total = t.Total;
[Err] 1054 - Unknown column 't.UserN1' in 'on clause'
t
is not in the scope. it's inside q
.
You probably mean something like this:
UPDATE tblNCC AS CC
JOIN (
SELECT
username,
sum(total) AS Total
FROM
(
SELECT
COUNT(*) AS Total,
UserN1 as username
FROM
`tblN1`
WHERE
UserN1 IN ('7047505')
AND dateN1 BETWEEN MAKEDATE(YEAR(CURDATE()), 1)
AND CURDATE()
UNION ALL
SELECT
COUNT(*) AS Total,
UserN2 as username
FROM
`tblN2`
WHERE
UserN2 ('7047505')
AND dateN2 BETWEEN MAKEDATE(YEAR(CURDATE()), 1)
AND CURDATE()
) AS t
) AS q ON q.username = CC.UserNcc
SET CC.Total = q.Total;
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