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我試圖獲取特定項目在特定月份中查看的次數。mysql在給定月份中查看組件的數量
我有一個看錶看起來是這樣的:
id_component viewed_date
1 | 2013-03-25 11:40:04
3 | 2013-03-26 11:41:04
4 | 2013-04-05 11:42:04
2 | 2013-04-07 11:43:04
3 | 2013-04-12 11:44:04
4 | 2013-04-17 11:45:04
3 | 2013-04-18 11:46:04
2 | 2013-04-20 11:47:04
4 | 2013-04-22 11:48:04
我有一個分量表是這樣的:
id, component_name, component_desc, component_price, folder_id
1 | muffler | ford focus muffler | 99.00 | 3
2 | air filter| ford focus air filter | 12.00 | 3
3 | oil filter| ford focus oil filter | 6.00 | 3
4 | wiper | ford focus rear wiper | 6.00 | 3
我當前的查詢是這樣的:
SELECT MONTHNAME(viewed_date) AS vmonth, YEAR(viewed_date) AS vyear, COUNT(*) AS vcount
FROM viewed AS V
RIGHT JOIN components AS C on V.id_component = C.id
WHERE id_component IN (SELECT id FROM components WHERE folder_id = '3')
GROUP BY YEAR(V.viewed_date), MONTH(V.viewed_date)
ORDER BY V.viewed_date
我想回來的是這樣的:
vmonth = march, vyear = 2012, vcount = 1, id = 1, component_name = muffler, etc. etc.
vmonth = april, vyear = 2012, vcount = 1, id = 2, component_name = air filter, etc. etc.
vmonth = march, vyear = 2012, vcount = 1, id = 3, component_name = oil filter, etc. etc.
vmonth = april, vyear = 2012, vcount = 2, id = 3, component_name = oil filter, etc. etc.
vmonth = april, vyear = 2012, vcount = 3, id = 4, component_name = wiper, etc. etc.
我得到這個
vmonth = march, vyear = 2012, vcount = 4
vmonth = april, vyear = 2012, vcount = 9
我沒有得到的加入數據或對單個組件的數據...只是每月彙總文件夾
它得是什麼愚蠢我正在做...任何建議?
所以基本上我做的倒退!大聲笑感謝你,它的工作就像一個魅力! – ppetree 2013-04-25 14:42:04