0
我有一個表列日期;它包含幾個月的記錄,但不是連續的。 要查看哪些月份存在(現在意味着在特定月份中有一個或多個記錄),我嘗試進行概述。它應該是這樣的:移調與MySQL分組日期
2013 Jan Feb Mar - May Jun // etc
2012 Jan - - Apr May - // etc
我可以得到所有今天的第一天,但我堅持如何轉置。如果我這樣做:
SELECT
IF (d = 1, month ,'-') AS Jan,
IF (d = 2, month ,'-') AS Feb,
IF (d = 3, month ,'-') AS Mar
FROM
(SELECT
MONTH(date) AS d,
DATE_FORMAT(date, '%Y-%m-01') AS month
FROM
table
GROUP BY
month
ORDER BY
month) m
GROUP BY YEAR(month)
如果給出了這樣的結果:
Jan Feb Mar
- - Mar
- Feb -
雖然它應該給:
Jan Feb Mar
- - Mar
Jan Feb Mar
太棒了,我清楚地思考錯誤的方向。謝謝! – Lennart 2013-04-25 21:19:02