mysql日期函數提供基於一年的53周的yyyy-mm-ww日期

Question

是否有一個mysql日期函數，根據下表提供基於一年53周的yyyy-mm-ww日期？例如，2015-01-01是（2015-jan-week01）。或者，有沒有一種方法可以讓我達到yyyy-mm-ww？

順便說一句，這種類型的月份按周分組嗎？我不知道該怎麼尋找

MySQL的WEE​​K的

jan     feb   mar 
--------------- -------------- ---------------- 
| 01 02 03 04 | | 05 06 07 08| |09 10 11 12 13 | 

apr    may   jun 
--------------- -------------- ----------------- 
| 14 15 16 17 | | 18 19 20 21| |22 23 24 25 26 | 

jul    aug   sep 
--------------- -------------- ----------------- 
| 27 28 29 30 | | 31 32 33 34| | 35 36 37 38 39 | 

oct    nov   dec 
--------------- -------------- -------------------- 
| 40 41 42 43 | | 44 45 46 47| | 48 49 50 51 52 53 | 

Answer 1

幾種方式（）函數使用53週一年，看到http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html#function_week

mysql> SELECT WEEK('2008-12-31',1); 
+----------------------+ 
| WEEK('2008-12-31',1) | 
+----------------------+ 
|     53 | 
+----------------------+ 
1 row in set (0.00 sec) 

mysql> SELECT CONCAT_WS('-', YEAR('2008-12-31'), SUBSTRING(MONTHNAME('2008-12-31'), 1, 3), WEEK('2008-12-31',1)); 
+----------------------------------------------------------------------------------------------------+ 
| CONCAT_WS('-', YEAR('2008-12-31'), SUBSTRING(MONTHNAME('2008-12-31'), 1, 3), WEEK('2008-12-31',1)) | 
+----------------------------------------------------------------------------------------------------+ 
| 2008-Dec-53                      | 
+----------------------------------------------------------------------------------------------------+ 
1 row in set (0.00 sec) 

mysql> SELECT CONCAT(YEAR('2015-01-01'), '-', LOWER(SUBSTRING(MONTHNAME('2015-01-01'), 1, 3)), '-week', WEEK('2015-01-01',1)); 
+-----------------------------------------------------------------------------------------------------------------+ 
| CONCAT(YEAR('2015-01-01'), '-', LOWER(SUBSTRING(MONTHNAME('2015-01-01'), 1, 3)), '-week', WEEK('2015-01-01',1)) | 
+-----------------------------------------------------------------------------------------------------------------+ 
| 2015-jan-week1                         | 
+-----------------------------------------------------------------------------------------------------------------+ 
1 row in set (0.00 sec) 

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