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[英]SQL: Column Must Appear in the GROUP BY Clause Or Be Used in an Aggregate Function
[英]Invalid operation: column “[column_name]” must appear in the GROUP BY clause or be used in an aggregate function;
我已經閱讀了近 10 多個與我相關的問題,但沒有人在我的情況下工作。 因為我的數據庫中有 3 張表,我正在嘗試根據時間計算它們的銷售額(年度銷售額)。 我需要按date_added
對我的查詢進行GROUP BY
。 在MYSQL
,它工作得很好並且給了我很好的結果,但是在紅移中我被卡住了。
MYSQL 查詢:
SELECT
MONTHNAME(o.date_added) AS MONTH,
YEAR(o.date_added) AS YEAR,
COUNT(o.order_id) AS orders,
FROM
order o
LEFT JOIN(
SELECT
op.order_id,
SUM(op.quantity) AS op_qty,
SUM(op.total) AS total,
SUM(op.cost) AS cost
FROM
order_product op
GROUP BY
op.order_id
) op
ON
op.order_id = o.order_id
LEFT JOIN(
SELECT
order_id,
SUM(IF(CODE = 'coupon', VALUE, 0)) AS coupon
FROM
order_total
WHERE
1
GROUP BY
order_id
) ot
ON
ot.order_id = o.order_id
WHERE
(
DATE(o.date_added) >= DATE_ADD(NOW(), INTERVAL - 24 MONTH) AND DATE(o.date_added) <=
DATE(NOW())) AND(o.order_status_id = '22' OR o.order_status_id = '23')
GROUP BY
MONTH(o.date_added),
YEAR(o.date_added)
ORDER BY
date_added ASC
LIMIT 0, 25
這個 MYSQL 查詢工作得很好,但是當我將它轉換為 RedShift 的 POSTGRE 格式時,它給了我Invalid operation: column "o.date_added" must appear in the GROUP BY clause or be used in an aggregate function;
POSTGRES 查詢:
SELECT
EXTRACT(MONTH FROM o.date_added) AS month,
EXTRACT(YEAR FROM o.date_added) AS year,
COUNT(o.order_id) AS orders
FROM
orders o
LEFT JOIN
(
SELECT
op.order_id,
SUM(op.quantity) AS op_qty,
SUM(op.total) AS total,
SUM(op.cost) AS cost
FROM
order_product op
GROUP BY
op.order_id
) op
ON op.order_id = o.order_id
LEFT JOIN
(
SELECT
order_id,
SUM(CASE
WHEN CODE = 'coupon' THEN VALUE
ELSE 0
END) AS coupon
FROM
order_total
WHERE
1
GROUP BY
order_id
) ot
ON ot.order_id = o.order_id
WHERE
(
DATE(o.date_added) >= now() + interval '-24 month'
AND DATE(o.date_added) <= DATE(NOW())
)
AND (
o.order_status_id = '22'
OR o.order_status_id = '23'
)
GROUP BY
(EXTRACT(MONTH FROM o.date_added), EXTRACT(YEAR FROM o.date_added))
ORDER BY
o.date_added ASC LIMIT 25
postgre 查詢中是否有任何語法錯誤以及為什么我需要在GROUP BY
中添加o.date_added
包含GROUP BY
的查詢中的ORDER BY
子句中的列的工作方式與SELECT
子句中提到的一樣。
你有
SELECT
MONTHNAME(o.date_added) AS MONTH,
YEAR(o.date_added) AS YEAR,
COUNT(o.order_id) AS orders,
FROM
order o
...
GROUP BY
MONTH(o.date_added),
YEAR(o.date_added)
ORDER BY
date_added ASC
LIMIT 0, 25
In MySQL this takes advantage of its notorious nonstandard handling of GROUP BY
(read this. https://dev.mysql.com/doc/refman/8.0/en/group-by-handling.html )
你想要的是得到一個在多個 DBMS 中工作的查詢,而不是這個。
ORDER BY
MONTH(o.date_added) ASC,
YEAR(o.date_added) ASC
將o.date_added
添加到您的GROUP BY
子句是不正確的,因為您不是按整個日期分組,而是按日期的月份和年份分組。
我發現了錯誤。我使用了 SQL 工作台並得到關於我在POSTGRE
查詢中使用的NOW()
function 的錯誤。
簡單地說,我用CURRENT_DATE
替換了NOW()
並且事情對我有用。 另外,我得到LIMIT 0, 25
的錯誤,但在 POSTGRE 中,它們允許LIMIT 25 [OFFSET n]
。
現在我的查詢看起來像:
SELECT
EXTRACT(MONTH FROM o.date_added) AS month,
EXTRACT(YEAR FROM o.date_added) AS year,
COUNT(o.order_id) AS orders
FROM
orders o
LEFT JOIN
(
SELECT
op.order_id,
SUM(op.quantity) AS op_qty,
SUM(op.total) AS total,
SUM(op.cost) AS cost
FROM
order_product op
GROUP BY
op.order_id
) op
ON op.order_id = o.order_id
LEFT JOIN
(
SELECT
order_id
FROM
order_total
WHERE
1
GROUP BY
order_id
) ot
ON ot.order_id = o.order_id
WHERE
(
DATE(o.date_added) >= CURRENT_DATE + interval '-24 month'
AND DATE(o.date_added) <= DATE(CURRENT_DATE)
)
GROUP BY EXTRACT(MONTH FROM o.date_added), EXTRACT(YEAR FROM o.date_added)
ORDER BY year ASC, month ASC LIMIT 25
注意:如果您正在使用 REDSHIFT。 它不相信錯誤。 我建議使用 SQL 工作台。 它解釋了錯誤。
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