Question

So I have a table which is structured in the following format:

in_click  first_name      create_date 
100       joe             2011-10-01 10:01
100       joe             2011-10-01 10:05
100       joe             2011-10-01 10:07
100       joe             2011-10-01 10:08
100       joe             2011-10-01 10:10
101       sara            2011-10-01 10:15
101       sara            2011-10-01 10:17
101       sara            2011-10-01 10:20
101       sara            2011-10-01 10:22

For each first name, I want to select the first and last rows.
So it should be the first date with the name joe and the last date
where the first name is joe. Kinda like an if-else statement, but
I’m just not sure how to get that information in MySQL.

Help?!

I’m running the following query to just get everything:

SELECT t.in_click_id, t.keyword, c.lead_id, c.first_name, c.last_name, 
ls.create_date, ls.discriminator, l.affiliate_id 
FROM lead_status AS ls
INNER JOIN leads AS l ON l.id = ls.lead_id 
INNER JOIN tracker AS t ON l.in_click_id = t.in_click_id
INNER JOIN contacts AS c ON ls.lead_id = c.lead_id 
WHERE l.affiliate_id NOT IN('1002','1003')
AND ls.create_date BETWEEN '2011-11-09' AND '2011-11-10';

This is what I’m trying to get:

in_click  first_name      create_date 
100       joe             2011-10-01 10:01
100       joe             2011-10-01 10:10
101       sara            2011-10-01 10:15
101       sara            2011-10-01 10:22

Answer 1

This works with the data you provided, can’t say it would work in MySQL, but it works in SQL Server.

select t.in_click, 
    t.first_name,
    t.create_date
from tracker t
where 
    t.create_date = (select min(create_date) from tracker where in_click = t.in_click)
    or t.create_date = (select max(create_date) from tracker where in_click = t.in_click)