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我的目標是創建具有id, revenue
(計算)和year
三列的視圖。我能夠得到id
和revenue
。但是,我的日期列採用varchar
格式。創建視圖中的SQL語句
我不知道如何做到這一點。下面是我的SQL語句:
SELECT DISTINCT
id,
SUM(fborders.quantity * fbmenu.fbMenuUnitPrice) as revenue
FROM
fb.fborders
INNER JOIN
fb.fbmenu ON fborders.fbMenuId = fbmenu.fbMenuId
WHERE
date = (SELECT
YEAR(STR_TO_DATE(date, '%d/%m/%Y'))
from
fb.fborders
WHERE
YEAR(STR_TO_DATE(date, '%d/%m/%Y')) = '2011'
OR YEAR(STR_TO_DATE(date, '%d/%m/%Y')) = '2012'
OR YEAR(STR_TO_DATE(date, '%d/%m/%Y')) = '2013')
GROUP BY id
我的輸出:
id | revenue | year _______________________ R1 | 100 | 2011 R1 | 999 | 2012 R1 | 832 | 2013 R2 | 323 | 2011 R2 | 318 | 2012 R2 | 111 | 2013 R3 | 432 | 2011 R3 | 342 | 2012 R3 | 873 | 2013