将字符串转换为日期在SQL Server中

Question

我面临的一个问题，我需要一个字符串转换为日期像

11年10个月12天的SQL Server中的日期。

请帮助任何帮助，将不胜感激。

Answer 1

我想你想是这样的

DECLARE @str VARCHAR(50)= '1 year 12 months 2 days' 
DECLARE @days INT= LEFT(@str, Charindex(' ', @str)), 
     @months INT = Substring(@str, Charindex('months', @str) - 3, 2), 
     @years INT = Substring(@str, Charindex('days', @str) - 3, 2); 

WITH days_back 
    AS (SELECT Dateadd(day, -@days, Cast(Getdate() AS DATE)) AS day_date), 
    month_back 
    AS (SELECT Dateadd(month, -@months, day_date) AS month_date 
     FROM days_back) 
SELECT Result = Dateadd(year, -@years, month_date) 
FROM month_back 

Answer 2

declare @fuzzy_date varchar(255) = '11 years 10 months 12 days' 

declare @date date 
declare @startdate date = '1999-12-31' 
declare @today_to_before date = getdate() 
declare @today_to_after date = getdate() 

declare @years int, @months int, @days int, @foo varchar(255) 

Set @years = left(@fuzzy_date, charindex('years', @fuzzy_date) - 1) 

Select @fuzzy_date = right(@fuzzy_date, len(@fuzzy_date) - charindex('years', @fuzzy_date) - 5) 

select @months = left(@fuzzy_date, charindex('months', @fuzzy_date) - 1) 

Select @days = replace(right(@fuzzy_date, len(@fuzzy_date) - charindex('months', @fuzzy_date) - 6), 'days', '') 

Select @years, @months, @days 

Set @date = dateadd(yy, @years, @startdate) 
Set @date = dateadd(mm, @months, @date) 
Set @date = dateadd(dd, @days, @date) 


Set @today_to_after = dateadd(yy, @years, @today_to_after) 
Set @today_to_after = dateadd(mm, @months, @today_to_after) 
Set @today_to_after = dateadd(dd, @days, @today_to_after) 

Set @today_to_before = dateadd(yy, -@years, @today_to_before) 
Set @today_to_before = dateadd(mm, -@months, @today_to_before) 
Set @today_to_before = dateadd(dd, -@days, @today_to_before) 
Select @date,@today_to_after,@today_to_before