SQL幫助編碼多年

Question

8）重新運行相同的報告，併爲這三家公司分別給出2014和2015年的數字。按年份訂購，然後在每年內從最高到最低訂單數量。

SELECT count(orders.orderid) 
,  customers.companyname 
,  to_char(orders.orderdate, 'Y') as Year 
FROM northwinds.orders 
JOIN northwinds.customers 
ON  customers.customerid = orders.customerid 
JOIN northwinds.orderdetails 
ON  orderdetails.orderid = orders.orderid 
WHERE orders.orderdate between '1-JAN-14' and '31-DEC-15' 
AND customers.companyname = 'Rattlesnake Canyon Grocery' 
OR  customers.companyname= 'Around the Horn' 
OR  customers.companyname='Island Trading' 
GROUP 
BY  customers.companyname 
AND to_char(orders.orderdate, 'Y') 
ORDER 
BY  count(orders.orderid) DESC 
,  to_char(orders.orderdate, 'Y') 
; 

當我運行此，我收到錯誤：

Error: [Oracle][ODBC][Ora]ORA-00933: SQL command not properly ended

Answer 1

GROUP BY customers.companyname AND to_char(orders.orderdate, 'Y') 
           ^^^ replace with a comma 

Answer 2

由於FuzzyTree說明更換並用逗號的起點。

SQL Server沒有to_char函數。由於我沒有使用ORACLE來調用SQL Server，我不確定是否發生某種形式的翻譯，或者這是否會導致錯誤。如果它產生一個錯誤，你可以改用下列之一： -

GROUP BY customers.companyname , YEAR(orders.orderdate) 
ORDER BY count(orders.orderid) DESC, YEAR(orders.orderdate) ; 

或

GROUP BY customers.companyname , CONVERT(CHAR(4),orders.orderdate,120) 
ORDER BY count(orders.orderid) DESC, CONVERT(CHAR(4),orders.orderdate,120); 

的120是指ODBC規範。請參閱https://msdn.microsoft.com/en-GB/library/ms187928.aspx

我發現CONVERT語句可以勝過YEAR（）函數，這有點違反直覺。