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PostgreSQL SQL错误[42703]:错误:列“minute”不存在

postgresql sql

Matt · 技术社区 · 6 年前

我有以下查询,得到以下错误:

SQL错误[42703]:错误:列“minute”不存在

但是我没有引用任何名为 minute .

SELECT customer_id,
MAX(created_at) last_order_date,
MAX(created_at) + ((SELECT EXTRACT(MINUTE FROM MAX(created_at)-MIN(created_at)) 
FROM (SELECT customer_id, created_at
FROM (SELECT customer_id, created_at, rank() over (partition by customer_id order by created_at desc) lasttwo
FROM orders) sub
WHERE sub.lasttwo <= 2
AND SUM(DATEDIFF(MINUTE,MIN(created_at),MAX(created_at))) > 2) s2) ::text||' minute')::INTERVAL AS nextdate,
(SELECT AVG(total_price - total_tax) 
FROM (SELECT customer_id, created_at, total_price, total_tax
FROM (SELECT customer_id, created_at, total_price, total_tax, rank() over (partition by customer_id order by created_at desc) lasttwo
FROM orders) sub
WHERE sub.lasttwo <= 2
AND SUM(DATEDIFF(MINUTE,MIN(created_at),MAX(created_at))) > 2) s2) nextval 
FROM orders 
GROUP BY customer_id

0 回复 | 直到 6 年前

Matt 6 年前

需要使用 EXTRACT 而不是 DATEDIFF

SELECT customer_id,
MAX(created_at) last_order_date,
MAX(created_at) + ((SELECT EXTRACT(MINUTE FROM MAX(created_at)-MIN(created_at)) 
FROM (SELECT customer_id, created_at
FROM (SELECT customer_id, created_at, rank() over (partition by customer_id order by created_at desc) lasttwo
FROM orders) sub
WHERE sub.lasttwo <= 2
AND SUM(EXTRACT(MINUTE FROM MAX(created_at)-MIN(created_at))) > 2) s2) ::text||' minute')::INTERVAL AS nextdate,
(SELECT AVG(total_price - total_tax) 
FROM (SELECT customer_id, created_at, total_price, total_tax
FROM (SELECT customer_id, created_at, total_price, total_tax, rank() over (partition by customer_id order by created_at desc) lasttwo
FROM orders) sub
WHERE sub.lasttwo <= 2
AND SUM(EXTRACT(MINUTE FROM MAX(created_at)-MIN(created_at))) > 2) s2) nextval  
FROM orders 
GROUP BY customer_id

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