Question

我试图在同一年的同一个月获得不同的总和，只是为了获得不同类型的总和。尝试使用此代码：

SELECT a.invoice_type, year( a.date ) AS Year, 
       date_format( a.date, '%M' ) AS `month` , 
       Sum( x.amount * x.price ) AS sum FROM records x 
JOIN paper_invoice a ON x.invoice_id = a.invoice_id 
WHERE year( a.date ) = '2012' 
GROUP BY a.invoice_type, Year( a.date ) , Month( a.date ) LIMIT 0 , 30

但它会在不同的行中显示结果：

http://www.part.lt/img/1505f0f13172922150febede85ddbf0925.png

但我需要它看起来像：

Year | Month   | SUM_GRYNAIS      | SUM_PAVEDIMU
2012 | January | 7597.14997705445 | 58740.2800849304

和ETC。

Answer 1

试试这个：

SELECT Year, Month,
MAX(CASE WHEN invoice_type = 'GRYNAIS' THEN sum END) As Sum_GRYNAIS
MAX(CASE WHEN invoice_type = 'PAVEDIMU' THEN sum END) As SUM_PAVEDIMU
FROM
(
SELECT a.invoice_type, year( a.date ) AS Year, 
date_format( a.date, '%M' ) AS `month` , Sum( x.amount * x.price ) AS sum 
FROM records x JOIN paper_invoice a ON x.invoice_id = a.invoice_id 
WHERE year( a.date ) = '2012' GROUP BY a.invoice_type, Year( a.date ) , 
Month( a.date ) LIMIT 0 , 30     

)
GROUP BY Year, Month

Answer 2

因为每个月都有不同的价值。在Field year尝试Group By。

Answer 3

你基本上在寻找PIVOT。 MySql没有PIVOT功能，但你仍然可以做到这一点。以下是MySql中PIVOT的示例：

http://www.artfulsoftware.com/infotree/queries.php#78

同月两个不同的SUMS

3 个答案: