How to convert time into days - tsql

Question

I have got this data in a table. Using SQL server. I need to create a report in which I need to add this duration and convert into days, datatype of duration column is timestamp. When I use Sum on this i get this error Operand data type varchar is invalid for sum operator.
What is the best way of converting this to number of days?
<table>
<thead>
<tr>
<th>TicketNumber</th>
<th>duration</th>
</tr>
</thead>
<tbody>
<tr>
<td>521163</td>
<td>44:08:11</td>
</tr>
</tbody>
<tbody>
<tr>
<td>906868</td>
<td>404:55:27</td>
</tr>
</tbody>
<tbody>
<tr>
<td>140013</td>
<td>412:08:03</td>
</tr>
</tbody>
</table>

Answer 1

Not clear from your description if you have a TABLE or HTML code! You speak about table but present HTML code.
If you have a table then we need to get a table, which means queries to create the table and insert the sample data. If you have HTML code, which you need to parse then you DO NOT HAVE A TABLE but a text.
Assuming that you have HTML code as presented in the question then you have an XML code which mean that you can use the function OPENXML to parse the data from the HTML code as presented here:
DECLARE #HTML as XML
SELECT #HTML = '
<table>
<thead>
<tr>
<th>TicketNumber</th>
<th>duration</th>
</tr>
</thead>
<tbody>
<tr>
<td>521163</td>
<td>44:08:11</td>
</tr>
</tbody>
<tbody>
<tr>
<td>906868</td>
<td>404:55:27</td>
</tr>
</tbody>
<tbody>
<tr>
<td>140013</td>
<td>412:08:03</td>
</tr>
</tbody>
</table>
'
SELECT #HTML
------------------ First we will learn how to parse the HTML data to get table structure
-- Note! This base on exact format of the HTML code!
-- Any change in the format will fail this solution
DECLARE #handle INT
DECLARE #PrepareXmlStatus INT
EXEC #PrepareXmlStatus= sp_xml_preparedocument #handle OUTPUT, #HTML
SELECT id, MyTime
FROM OPENXML(#handle, '/table/tbody/tr', 1)
WITH (
id NVARCHAR(MAX) '(td)[1]',
MyTime NVARCHAR(MAX) '(td)[2]'
)
EXEC sp_xml_removedocument #handle
Using this approach, we can now use the data in the result SET from the above query and calculate the SUM of the times, as presented here (this should be your solution):
DECLARE #HTML as XML
SELECT #HTML = '
<table>
<thead>
<tr>
<th>TicketNumber</th>
<th>duration</th>
</tr>
</thead>
<tbody>
<tr>
<td>521163</td>
<td>44:08:11</td>
</tr>
</tbody>
<tbody>
<tr>
<td>906868</td>
<td>404:55:27</td>
</tr>
</tbody>
<tbody>
<tr>
<td>140013</td>
<td>412:08:03</td>
</tr>
</tbody>
</table>
'
DECLARE #handle INT
DECLARE #PrepareXmlStatus INT
EXEC #PrepareXmlStatus= sp_xml_preparedocument #handle OUTPUT, #HTML
---------------- Now we can use the above way of parsiong the HTML in order to calculate the SUM of the times
EXEC #PrepareXmlStatus= sp_xml_preparedocument #handle OUTPUT, #HTML
;With MyCTE as (
SELECT id, MyTime
FROM OPENXML(#handle, '/table/tbody/tr', 1)
WITH (
id NVARCHAR(MAX) '(td)[1]',
MyTime NVARCHAR(MAX) '(td)[2]'
)
),
-- Convert Seconds, minutes, hours to INT and sum
MyCTE1 as(
SELECT
MySec = SUM(CONVERT(INT,PARSENAME(REPLACE(MyTime,':','.'),1))),
MyMin = SUM(CONVERT(INT,PARSENAME(REPLACE(MyTime,':','.'),2))),
MyHour = SUM(CONVERT(INT,PARSENAME(REPLACE(MyTime,':','.'),3)))
from MyCTE
),
-- Move from seconds to minutes and from minutes to hours if the value above 60
MyCTE2 as(
SELECT
MySec = (MySec%60),
MyMin = (MyMin + (MySec/60)) % 60,
MyHour = MyHour + ((MyMin + (MySec/60)) / 60)
from MyCTE1
)
SELECT
CONVERT(VARCHAR(10), MyHour) + ':' +
RIGHT('00' + CONVERT(VARCHAR(2), MyMin),2) + ':' +
RIGHT('00' + CONVERT(VARCHAR(2), MySec),2)
FROM MyCTE2
EXEC sp_xml_removedocument #handle
Using existing table
If you already have a table (not HTML code) and all you need to find the number of days, hours, minutes, seconds then you simply need to use the end part of the above query. We do not need to parse the HTML code so we can jump to the CTE named MyCTE01.
For example, using the op DDL+DML which was provided in the comment:
CREATE TABLE [dbo].[OpenTickets] ( [TicketNumber] [varchar](50) NULL ,[Duration] [varchar](20) NULL )
GO
INSERT INTO [dbo].[OpenTickets] VALUES
( 521163 ,'44:08:11' ) ,( 746008 ,'45:38:35' ) ,( 120025 ,'48:50:31' ) ,( 780125 ,'75:15:59' ) ,( 903960 ,'76:23:49' ) ,
( 937883 ,'178:20:27' ) ,( 524404 ,'80:16:08' ) ,( 374972 ,'81:17:28' )
GO
SELECT * FROM [OpenTickets]
GO
;With MyCTE1 as(
SELECT
MySec = SUM(CONVERT(INT,PARSENAME(REPLACE([Duration],':','.'),1))),
MyMin = SUM(CONVERT(INT,PARSENAME(REPLACE([Duration],':','.'),2))),
MyHour = SUM(CONVERT(INT,PARSENAME(REPLACE([Duration],':','.'),3)))
from [OpenTickets]
),
-- Move from seconds to minutes and from minutes to hours if the value above 60
MyCTE2 as(
SELECT
MySec = (MySec%60),
MyMin = (MyMin + (MySec/60)) % 60,
MyHour = MyHour + ((MyMin + (MySec/60)) / 60)
from MyCTE1
)
SELECT
MyDays = MyHour/24,
Total = 'Days: ' + CONVERT(VARCHAR(10), MyHour/24) + ' and ' +
CONVERT(VARCHAR(10), MyHour % 24) + ':' +
RIGHT('00' + CONVERT(VARCHAR(2), MyMin),2) + ':' +
RIGHT('00' + CONVERT(VARCHAR(2), MySec),2),
TotalTime = CONVERT(VARCHAR(10), MyHour) + ':' +
RIGHT('00' + CONVERT(VARCHAR(2), MyMin),2) + ':' +
RIGHT('00' + CONVERT(VARCHAR(2), MySec),2)
FROM MyCTE2
GO