在SQL Server 2008中将Varchar HH：MM转换为整数分钟的查询

Question

I am having a table in SQL Server where there is a column name TimeSpent Datatype Varchar(25) . It basically stores Time as HH:MM Format. As per the requirement now i want that it gives me actual timespent in Minutes ie 01:00 gives me 60, 01:30 -> 90. Please help me to write the query in SQL Server 2008 , so that will convert Varchar (HH:MM) into Minutes(integer).

Answer 1

Try

SELECT LTRIM(DATEDIFF(MINUTE, 0, TimeSpent)) 
  FROM yourtable

Given

| TIMESPENT |
-------------
|     00:12 |
|     01:05 |
|     10:00 |

Output:

| MINUTES |
-----------
|      12 |
|      65 |
|     600 |

Here is SQLFiddle

Answer 2

This will solve your issue. Please refer to SQLFiddle

select cast(left(TimeSpent, charindex(':',TimeSpent,0)-1) as int)*60+
       cast(right(TimeSpent, len(TimeSpent)-charindex(':',TimeSpent, 0)) as int)
from test

Answer 3

SELECT top 1（substring（CONVERT（VARCHAR（5），TimeSpent，108），1，2）* 60 + substring（CONVERT（VARCHAR（5），TimeSpent，108），4，2）作为测试分钟