Question

Still learning MySQL, so bear with me.

So I have two tables: leads, which is:

id  dat          in_click_id 
55  2011-08-15      400 
10  2011-08-13      400
34  2011-08-13      420 
50  2011-08-12      420   
15  2011-08-14      425

The second table is called in_clicks:

id    location    keyword
400     KS         word1  
410     CO         word2
415     LA         word2
420     CA         word2
425     FL         word3

So I am trying to find out if a lead was associated with an in click.
In other words, I am trying to get the following:

keyword     count(keyword)
word1        15
...          ...

So the keyword will be the word, and the second column
will the aggregate number of leads from that keyword.

Since the data is in two separate tables, I need to use the join command, but
I’m having some issues implementing it.

Here’s one of my many attempts, which obviously doesn’t work.

SELECT id, discriminator, create_date, in_click_id, COUNT(in_click_id) 
FROM leads 
WHERE create_date LIKE '%2011-08-17%' 
ORDER BY COUNT(in_click_id) DESC 
INNER JOIN in_click ON leads.in_click_id = in_clicks.id;

Help!?

Answer 1

You need to use GROUP BY, like this:

SELECT leads.id, COUNT(in_click_id) 
FROM leads 
INNER JOIN in_click ON leads.in_click_id = in_clicks.id
WHERE create_date LIKE '%2011-08-17%'
GROUP BY leads.id
ORDER BY COUNT(in_click_id) DESC