Newbie SQL question... Please help :)

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Newbie SQL question... Please help :)

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bobbyGratton
Starting Member

1 Post

Posted - 2009-06-01 : 13:12:53

Using MS SQL Server 2005.

I need help formulating a SQL query,

I have a table called "leads" and I need to select a particular group of records from.

Here's what i need:

-- Select all records that have the value of '5' in the "type" field (int), this is easy even for a noob :)

-- Also, I need to grab only uniques by "email" field. (I'm expecting that multiple groups of 2 or 3 records will have the same email address)

-- But, I need to grab only the LAST record to go in by email address. I have a date field called "created"

Thanks a lot for your help guys! I appreciate it.

raky
Aged Yak Warrior

767 Posts

Posted - 2009-06-01 : 13:27:52

try this

declare @test table ( id int identity(1,1), Name varchar(30),[type] int, email varchar(30),created datetime )
insert into @test
select 'Peter',5,'abc@zzz.com','5/1/2009' union all
select 'John',6,'rty@uuu.com','5/1/2009' union all
select 'Kelvin',5,'abc@zzz.com','6/1/2009'

select t.name,t.email
from (
select row_number() over( partition by [type] order by created desc ) as sno ,email,name
from @test
where [type] = '5')t
where t.sno = 1

visakh16
Very Important crosS Applying yaK Herder

52326 Posts

Posted - 2009-06-01 : 13:50:21

if sql 2000 or earlier


SELECT t.*
FROM table t
INNER JOIN (SELECT email,MAX(created) AS last
            FROM table
            WHERE t.type=5
            GROUP BY email)t1
ON t1.email=t.email
AND t1.last=t.created

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