how to calculatet sum of a column with timespan type

Question

1.00/5 (1 vote)

See more:

Hi, In a sp I need to sum valus of a column of timespan format which saved as Varchar datatype.
(because of some reasons)
How can I convert each value to timespan and then sum that with other values
Table structure
=============================
Field ------------ Data Type
=============================
Name ------------ varchar(255)
Column A ------ varchar(50)

values of column A(hour:minute)
=============================
30:23
140:12
15:56
.
.

Posted 6-Sep-14 4:11am

mit62

Updated 6-Sep-14 8:10am

v3

Add a Solution

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

kbrandwijk · Accepted Answer · 2014-09-06T04:28:00

You will need to parse the string, splitting hours and minutes, then add the hours and add the minutes, and divide minutes by 60 to see if you need to add any hours, and keep the remainder as minutes.

SQL

-- CAST(PARSENAME(REPLACE(ColumnA, ":", "."),1) as INT) gives you the minutes
-- CAST(PARSENAME(REPLACE(ColumnA, ":", "."),2) as INT) gives you the hours

--@totalhours = @sumhours + @summinutes / 60
--@totalminutes = @summinutes % 60

--So the query becomes:
SELECT 
  SUM(CAST(PARSENAME(REPLACE(ColumnA, ":", "."),2) as INT)) + (SUM(CAST(PARSENAME(REPLACE(ColumnA, ":", "."),1) as INT)) / 60) as totalhours,
  SUM(CAST(PARSENAME(REPLACE(ColumnA, ":", "."),1) as INT)) % 60 as remainingminutes
FROM 
  tablename