mysql - 在mysql中显示周数

Question

我需要在mysql中显示月份的周数，目前我可以在执行此查询时获取一年的周数。我每周检索结果，需要显示周数(如一月第一周、一月第二周、一月第三周等)。有谁可以帮我做到这一点吗？

SELECT  d.draftID_PK,
          d.clientID_FK,
          count(d.quoteNr) AS totalquote,
          DATE_FORMAT (d.draftDate,'%u  %M %Y') as draftDate,
          c.clientName
FROM draft d
INNER JOIN client c ON c.clientID_PK = d.clientId_FK
WHERE   d.draftDate<CURDATE() AND d.draftDate>'2013-01-05'
        AND c.clientName = '{$client_name}' 
GROUP BY DATE_FORMAT (d.draftDate,'%u')
ORDER BY d.draftDate DESC

Answer 1

我做了一些东西，也许这可以帮助你，但周数根据一周的开始而变化，例如: 在巴西，一周从周日开始。所以看看这是否可以解决您的问题。

SET @date:='2014-08-31';
SELECT 
    @first := date_add(
        date_add(
            LAST_DAY(@date),
            interval 1 DAY
        ),
        interval -1 MONTH
    ) AS first_day,
    @date,
    -- EXAMPLE 1
    WeekofYear(@date),
    WeekofYear(@first),
    WeekofYear(@date)-(WeekofYear(@first)-1) Num_Week,
    -- EXAPLE 2 - Works in Brazil perfectly
    Week(@date),
    Week(@first),
    Week(@date)-(Week(@first)-1) Num_Week_Brazil