"DISTINCT email" with extra fields also in recordset

itimes
itimes used Ask the Experts™
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Hi

I using the code below to get a deduplicated list from a SQL server table but i also want to be able to get extra fields form teh table so i add " ,name"  however this then gives me duplicates ... ?????

sql = "Select DISTINCT email,name from tbl1"

Help .... :o(
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Use group by clause in your sql query

Consruct your sql like this:

sql = "Select DISTINCT email,name from tbl1 group by Email,name"

In case you aslo want to get extra fields, you can use group by clause with them also

Thanks





Commented:
Both are identical :

Select DISTINCT email,name from tbl1
=
Select DISTINCT email,name from tbl1 group by Email,name

If you have duplicated email when you add names in your select statement is because you have more than 1 name for each email...

If you want post an example and what do you need and we try to help you,.
Top Expert 2012
Commented:
If all you want is one name for each email address than try something like this:

sql = "Select email, Max(name) from tbl1 Group By email"

Anthony
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If you get dups using this Select
DISTINCT email,name from tbl1  
that means you have more than one name associated with same email address.

You can find the duplicate email address using this query

select email
from table
group by email
having count(*) > 1

You could try get distinct list. (You will get only the max name if there are more than one names associated with the same email address)

select email, max(name)
from table
group by email

Author

Commented:
acperkins,

This works perfectly

whats is max then ???
Top Expert 2012

Commented:
>>whats is max then ??? <<
Max will give you the "maximum" name within the group.  In other words, if you have something like this:
John myemail@domain.com
Jim myemail@domain.com
Jay myemail@domain.com
Adam myotheremail@domain.com
Andrew myotheremail@domain.com

You would get:
John myemail@domain.com
Andrew myotheremail@domain.com

You can also use Min to give to the "minimum" name.  In that case the result would be:
Jay myemail@domain.com
Adam myotheremail@domain.com

Anthony

Author

Commented:
acperkins,

so if the name field was DATES

01/01/2002 01:01:56
02/01/2002 10:01:58
05/01/2002 02:01:12
04/01/2002 12:01:05

"05/01/2002 02:01:12"  woudl be the MAX ???

Thanks for the help ...
Top Expert 2012

Commented:
>>"05/01/2002 02:01:12"  woudl be the MAX ???<<
That is correct

Anthony

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