SQL Server - Find e-mail address in a string

Question

I am trying to retrieve a part of comments field in our database, that contains just the e-mail address. So for example, Comment might look like this:

Type of Count: Itemised  EPOS: CBE    Email Reports to: user@gmail.com  
CC user@domain.ie  Name of Email recipient: Xxxxx  
Store Contact: Person PhoneNumber    Wet stock: No  Deli: Yes  Packaging: Yes    Additional Requirements:   Payment Terms: On the day.    
Supervisor Feedback  Count Issues or concerns: No  Unusual Storage Areas: No  Payment received: Yes  Payment sent to Office: 
Posted on Monday 29th June 2015    Downtime due to IT issues: None  Details:  

I have this query:

SELECT  st.Comments,        
    CASE
        WHEN CHARINDEX('@',st.Comments) = 0 THEN NULL
        ELSE SUBSTRING(st.Comments,beginningOfEmail,endOfEmail-beginningOfEmail)
    END email , sc.CustomerName1
FROM tblStockTakes st
INNER JOIN tblCustomers sc ON st.CustomerId = sc.CustomerId
CROSS APPLY (SELECT CHARINDEX(' ',st.Comments + 'Reports to:     ',CHARINDEX('@',st.Comments))) AS A(endOfEmail)
CROSS APPLY (SELECT LEN(st.Comments)/2 - CHARINDEX(' ',REVERSE('EPOS: ' +     st.Comments),CHARINDEX('@',REVERSE(' ' + st.Comments))) + 2) AS     B(beginningOfEmail)
WHERE st.StockTakeDate BETWEEN '2015-06-27 06:00:00.000' AND '2015-10-28 06:00:00.000'

Which returns the following:

Type of Count: Itemised  EPOS: CBE    Email Reports to: user@gmail.com  CC

What should I change in the query to remove the front part, and just start with Email Reports To: xxx@gmail.com?

Thanks for any advise!

Answer 1

This is another way to format your string which might need a little bit of adjustment. I put comments for beginningOfEmail and endOfEmail , in case you want to keep your strategy of creating the values in a CROSS APPLY :

SUBSTRING(st.Comments
,PATINDEX('%Email Reports to: %',st.Comments) --beginningOfEmail
,PATINDEX('%.com CC%',st.Comments)-PATINDEX('%Email Reports to: %',st.Comments)+4) --endOfEmail