MySQL查询显示日期

Question

之间周期以我的表，我有两个单独的日期字段，X和Y在字段×1具有13/08/2008和外地YI的日期有日期13/08/2015年。

我在想，如果有工作了六个月时间日期是现场X和Y之间有什么SQL的方式，其在单独的行显示的结果？所以，我希望在两个领域有以下结果：

BEGIN  | END 
13-Aug-08 | 13-Feb-09 
13-Feb-09 | 13-Aug-09 
13-Aug-09 | 15-Feb-10 
15-Feb-10 | 13-Aug-10 
13-Aug-10 | 14-Feb-11 
14-Feb-11 | 15-Aug-11 
15-Aug-11 | 13-Feb-12 
13-Feb-12 | 13-Aug-12 
13-Aug-12 | 13-Feb-13 
13-Feb-13 | 13-Aug-13 
13-Aug-13 | 13-Feb-14 
13-Feb-14 | 13-Aug-14 
13-Aug-14 | 13-Feb-15 
13-Feb-15 | 13-Aug-15 

这可能吗？

感谢

Answer 1

你可以尝试这样的事情：

DATE '2006-05-20' + INTERVAL 5 DAY -> DATE '2006-05-25' 
DATE '2006-05-20' + INTERVAL 5 MONTH -> DATE '2006-10-20' 
DATE '2006-05-20' + INTERVAL 5 YEAR -> DATE '2011-05-20' 

---

例1：

CREATE TABLE BEGIN_DATES 
(
    BDates DATETIME 
); 

INSERT INTO BEGIN_DATES VALUE ('13/08/2008'); 
INSERT INTO BEGIN_DATES VALUE ('13/02/2009'); 
INSERT INTO BEGIN_DATES VALUE ('13/08/2009'); 
INSERT INTO BEGIN_DATES VALUE ('15/02/2010'); 
INSERT INTO BEGIN_DATES VALUE ('13/08/2010'); 
INSERT INTO BEGIN_DATES VALUE ('14/02/2011'); 
INSERT INTO BEGIN_DATES VALUE ('15/08/2011'); 
INSERT INTO BEGIN_DATES VALUE ('13/02/2012'); 
INSERT INTO BEGIN_DATES VALUE ('13/08/2012'); 
INSERT INTO BEGIN_DATES VALUE ('13/02/2013'); 
INSERT INTO BEGIN_DATES VALUE ('13/08/2013'); 
INSERT INTO BEGIN_DATES VALUE ('13/02/2014'); 
INSERT INTO BEGIN_DATES VALUE ('13/08/2014'); 
INSERT INTO BEGIN_DATES VALUE ('13/02/2015'); 


SELECT BDates AS BEGIN, (BDates + INTERVAL 6 MONTH) AS END 
FROM BEGIN_DATES 

DROP TABLE BEGIN_DATES 

---

Ë充足2：

BEGIN 
SET @date = '2008-08-13'; 
SET @Edate ='2015-08-13'; 

WHILE @date <= @Edate DO 

SELECT @date AS BEGIN_DATE, CAST(@date AS DATETIME) + INTERVAL 6 MONTH AS END_DATE; -- ADDDATE(@date,INTERVAL 6 MONTH) 

SET @date = CAST(@date AS DATETIME) + INTERVAL 6 MONTH; -- Or ADDDATE(@date,INTERVAL 6 MONTH) 

END WHILE; 
END