MySQL加入嵌套选择

Question

I am trying to get the total of all orders of each seller per year, month, and day using this sql. I am still wrapping my head around joins, but from what I know i thought this should work

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

But it gives me an error (#1064 - near 'ON orders.sellerid = sellers.sellerid GROUP BY sellers.username HAVING' at line 9)

Answer 1

You need to set ON clause on every join table not only the lastone. 

Regards

JOIN
    `orders` ON ??? = ???,
    (SELECT SUM( orders.orderPrice ) FROM  `orders` WHERE YEAR( orderDate ) = YEAR(   CURDATE( ) ) ) AS year ON orders.sellerid = sellers.sellerid,
    (SELECT SUM( orders.orderPrice ) FROM  `orders` WHERE MONTH( orderDate ) = MONTH( CURDATE( ) ) ) AS month ON orders.sellerid = sellers.sellerid,
    (SELECT SUM( orders.orderPrice ) FROM  `orders` WHERE orderDate = CURDATE() ) AS day 
         ON orders.sellerid = sellers.sellerid