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我試圖使用這個SQL獲得每個賣家每年,每月和每天的所有訂單的總數。我仍然環繞我的頭周圍加入,但是從我知道我想這應該工作Mysql加入嵌套選擇
SELECT sellers.username, sellers.registerDate, sellers.sellerid,
orders.orderPrice, orders.orderDate, orders.sellerid,
count(orders.orderPrice) AS products, SUM(orders.orderPrice) AS total,
FROM `sellers`
JOIN
`orders`,
(SELECT SUM(orders.orderPrice) FROM `orders` WHERE YEAR(orderDate) = YEAR(CURDATE())) AS year,
(SELECT SUM(orders.orderPrice) FROM `orders` WHERE MONTH(orderDate) = MONTH(CURDATE())) AS month,
(SELECT SUM(orders.orderPrice) FROM `orders` WHERE orderDate = CURDATE()) AS day
ON orders.sellerid = sellers.sellerid
GROUP BY sellers.username
HAVING total > 0
ORDER BY total desc
LIMIT 0 , 4
但它給我一個錯誤(#1064 - 近「ON orders.sellerid = sellers.sellerid GROUP BY賣家。用戶名HAVING」在第9行)
'JOIN single_(派生)_table_reference ON whatever',不'加入多個,表,參考文獻,與,一個ON clause'? – Wrikken
如果使用顯式表示法(TableA JOIN TableB),則必須在JOIN之後使用ON子句。如果您使用逗號來鏈接您的表格,則必須在WHERE子句中添加鏈接您的表格的條件(不使用ON子句) –