关于时间数据处理的问题

[dgz988]

各位老大请帮忙：
在数据库内有一列数据：　abc070805
前面三位是随机，后面是日期数据，这样我可以用SUBSTRING取出日期数据070805，我想在它的基础上推算两年后的日期，可否用SQL来实现啊？

即用语句实现出来的结果是：090805

谢谢了。

[dawugui]

declare @s as varchar(20)
set @s = 'abc070805'

select result = left(@s,3) + 
right(datename(year,(dateadd(year,2,cast(right(@s,6) as datetime)))),2)
+ datename(mm,(dateadd(year,2,cast(right(@s,6) as datetime))))
+ datename(day,(dateadd(year,2,cast(right(@s,6) as datetime))))

/*
result
--------------------------------------------------------------------
abc09085

(1 行受影响)
*/

[dawugui]

declare @s as varchar(20)
set @s = 'abc070805'

select result = left(@s,3) + 
right(datename(year,(dateadd(year,2,cast(right(@s,6) as datetime)))),2)
+ right('00'+datename(mm,(dateadd(year,2,cast(right(@s,6) as datetime)))),2)
+ right('00'+datename(day,(dateadd(year,2,cast(right(@s,6) as datetime)))),2)

/*
result
--------------------------------------------------------------------
abc09085

(1 行受影响)
*/

[dawugui]

declare @s as varchar(20)
set @s = 'abc070805'

select result = left(@s,3) + 
right(datename(year,(dateadd(year,2,cast(right(@s,6) as datetime)))),2)
+ right('00'+datename(mm,(dateadd(year,2,cast(right(@s,6) as datetime)))),2)
+ right('00'+datename(day,(dateadd(year,2,cast(right(@s,6) as datetime)))),2)

/*
result
--------------------------------------------------------------------
abc090805

(1 行受影响)
*/

[dawugui]

declare @s as varchar(20)
set @s = 'abc070805'

select result = 
right(datename(year,(dateadd(year,2,cast(right(@s,6) as datetime)))),2)
+ right('00'+datename(mm,(dateadd(year,2,cast(right(@s,6) as datetime)))),2)
+ right('00'+datename(day,(dateadd(year,2,cast(right(@s,6) as datetime)))),2)

/*
result
--------------------------------------------------------------------
090805

(1 行受影响)
*/

[popeye627]

select to_char(ADD_MONTHS(to_date(substr('abc070805',4,6),'yymmdd'),24),'yymmdd') from dual

[popeye627]

select to_char(ADD_MONTHS(to_date(substr('abc070805',4,6),'yymmdd'),24),'yymmdd') from dual
---24:2年24个月

---------查询结果-------------
1 090805

[dgz988]

感动中。。一个贴子这么多兄弟观注。
非常感谢！！！我试一下。

[popeye627]

不好意思，写成Oracle的了，呵呵 LZ还是参照乌龟的吧

[popeye627]

Select substring(CONVERT(varchar(30),dateadd(year,2,cast(right('abc070805',6)as datetime)),112),3,6) result

result
------------
090805

(1 個資料列受到影響)

---dateadd的第二个参数2，表2年

[popeye627]

Select substring(CONVERT(varchar(30),dateadd(year,2,cast(right('abc070805',6)as datetime)),112),3,6) result

result
------------
090805

(1 個資料列受到影響)

---dateadd的第二个参数2，表2年

[dgz988]

明白。谢谢老大。嘿嘿。。