如何从数据中提取月份两位数varchar？ SQL 2012

Question

这是我的数据集

我正在创建一个存储过程，该列在varchar中。我试图转换为日期时间，但没有成功做到这一点...我试图提取两个数字的月份，例如。 01,02,03做一个这样的表。

CREATE Proc qe 
AS
BEGIN

SELECT LEFT(CREATED_TIME,4) AS 'YEAR' , COUNT(*) AS 'NO OF POSTS'
FROM Sheet1$ 
GROUP BY  LEFT(CREATED_TIME,4)

/**SELECT LEFT(CREATED_TIME,7 (RIGHT CREATED_TIME,19))  AS 'MONTH',        
COUNT(*) AS 'NO OF POSTS'
FROM Sheet1$ 
GROUP BY LEFT(CREATED_TIME,7 (RIGHT CREATED_TIME,19))**/

END 

EXEC qe

如何提取月份，例如。 01,02,03它留在varchar？没有转换？我非常感谢你的帮助!!!

Answer 1

如果这是一个字符串，你可以这样做：

SELECT SUBSTRING(CREATED_TIME,6,2);

仅仅是因为完整性：要从日期中得到两位数的月份，你可以这样：

SELECT REPLACE(STR(MONTH(GETDATE()),2),' ','0');

Answer 2

您可以使用zero padding function in SQL Server 请检查引用的SQL教程

select dbo.udfLeftSQLPadding( DATEPART(mm,GETDATE()),2,'0')

Answer 3

SELECT MONTH(CAST(create_time AS datetime))

Answer 4

这样的事情：

select right('0'+cast(month_num as varchar(2)) ,2) as month, month_count
from
(
    select datepart(month, cast(replace(created_time, '+0000','') as datetime)) as month_num
    , COUNT(*) AS 'NO OF POSTS' as month_count
    FROM Sheet1$ 
    GROUP BY  datepart(month, cast(replace(created_time, '+0000','') as datetime))
) temp