在WHERE内的FROM内的SELECT里面，SELECT
field_one,
field_two,
field_three,
field_one-field_three AS field_five,
field_six
FROM (
SELECT
IFNULL(
(
SELECT
SUM(us.field_seven) AS field_one
FROM
table_one us
WHERE
us.rto_id = rto.relevant_field_one
AND
us.created >= (
SELECT
IF(
selected_date IS NULL,
MIN(created),
selected_date
)
FROM (
SELECT
IF(
latest_date < DATE_SUB(CURDATE(), INTERVAL rtt.relevant_field_two DAY),
CURDATE(),
MAX(prevdate)
) AS selected_date,
created
FROM (
SELECT
created,
@calc_prevdate as prevdate,
DATEDIFF(@calc_prevdate, created) AS diff,
@calc_prevdate := created
FROM (
SELECT
sto.created
FROM
table_one sto
WHERE
sto.rto_id = rto.relevant_field_one
UNION ALL
SELECT
stt.created
FROM
table_two stt
WHERE
stt.rto_id = rto.relevant_field_one
ORDER BY
created DESC
) AS x
CROSS JOIN (
SELECT
@calc_prevdate := NULL
) as vars
) AS z
CROSS JOIN (
SELECT
MAX(created) AS latest_date
FROM(
SELECT
sto.created
FROM
table_one sto
WHERE
sto.rto_id = rto.relevant_field_one
UNION ALL
SELECT
stt.created
FROM
table_two stt
WHERE
stt.rto_id = rto.relevant_field_one
ORDER BY
created DESC
) as z
) AS y
WHERE
diff > rtt.relevant_field_two
) as w
)
GROUP BY us.rto_id
),0
) AS field_one,
IFNULL(
(
SELECT
SUM(tt.field_seven) AS field_three
FROM
table_two tt
WHERE
tt.rto_id = rto.relevant_field_one
AND
tt.created >= (
SELECT
IF(
selected_date IS NULL,
MIN(created),
selected_date
)
FROM (
SELECT
IF(
latest_date < DATE_SUB(CURDATE(), INTERVAL rtt.relevant_field_two DAY),
CURDATE(),
MAX(prevdate)
) AS selected_date,
created
FROM (
SELECT
created,
@calc_prevdate as prevdate,
DATEDIFF(@calc_prevdate, created) AS diff,
@calc_prevdate := created
FROM (
SELECT
sto.created
FROM
table_one sto
WHERE
sto.rto_id = rto.relevant_field_one
UNION ALL
SELECT
stt.created
FROM
table_two stt
WHERE
stt.rto_id = rto.relevant_field_one
ORDER BY
created DESC
) AS x
CROSS JOIN (
SELECT
@calc_prevdate := NULL
) as vars
) AS z
CROSS JOIN (
SELECT
MAX(created) AS latest_date
FROM(
SELECT
sto.created
FROM
table_one sto
WHERE
sto.rto_id = rto.relevant_field_one
UNION ALL
SELECT
stt.created
FROM
table_two stt
WHERE
stt.rto_id = rto.relevant_field_one
ORDER BY
created DESC
) as z
) AS y
WHERE
diff > rtt.relevant_field_two
) as w
)
GROUP BY tt.rto_id
), 0
) AS field_three,
IFNULL(
(
SELECT
COUNT(*) AS field_two
FROM
table_two tt
WHERE
tt.rto_id = rto.relevant_field_one
GROUP BY tt.rto_id
), 0
) AS field_two,
IFNULL(
(
SELECT
GREATEST(
IFNULL(MAX(us.created), 0), IFNULL(MAX(tt.created), 0)
) AS field_six
FROM
table_one us
LEFT JOIN
table_two tt ON us.rto_id = tt.rto_id
WHERE
us.rto_id = rto.relevant_field_one
GROUP BY us.rto_id
), 0
) AS field_six
FROM
relevant_table_one rto
LEFT JOIN
relevant_table_two rtt ON rto.rtt_id = rtt.id
WHERE
rto.rtt_id = ?
GROUP BY rto.relevant_field_one
) v
ORDER BY id ASC;
内的另一个子查询内部加入另一个表，我需要从该连接表中访问一列。
编辑以添加更完整的示例：
relevant_table_one.relevant_field_one鉴于该查询，我需要从子查询中访问relevant_table_two.relevant_field_two和FROM，但restrictions on subqueries表示您无法访问{{1}内的子查询中的父表}}
答案 0 :(得分：0)
我设法解决了这个问题（到目前为止我认为），在可访问的select中添加@rfo := relevant_field_one和@rft := relevant_field_two，然后引用创建的变量而不是嵌套中的列在相关的地方查询。
我可能只是得到误报，但到目前为止，解决方案似乎正在发挥作用。