MySQL: How can I count visitors per page per day?

Question

I have an interesting query here. I have a table that stores visitor's ip and page_id along with a timestamp ( date ). I would like to count the amount of visitors per day for each page_id so I can then take that output and calculate which page_id is trending (on a daily basis)

Table visitors_counter looks like this:

id|page_id | ip    | date
1 |   37   |1.1.1.1| 2017-02-10 14:03:16
2 |   38   |1.2.1.1| 2017-02-10 11:04:16
3 |   39   |1.1.3.1| 2017-02-10 16:05:16
4 |   37   |1.5.1.1| 2017-02-10 17:08:16
5 |   37   |1.1.1.1| 2017-02-10 19:07:16

And what I would like to achieve would be something like:

id|page_id |visitors | date
1 |   37   |3        | 2017-02-10 14:03:16
2 |   38   |1        | 2017-02-10 11:04:16
3 |   39   |1        | 2017-02-10 16:05:16

So far I've been able to count the amount of unique visitors per day with

SELECT DATE(date) Date, COUNT(DISTINCT page_id) uniqueperday FROM visitors_counter GROUP BY DATE(date)

i know im close, but its not quite what I want as I don't know which page_id are the most visited ones

Thanks

Answer 1

Simply add page_id in the GROUP BY clause:

SELECT DATE(date) Date, page_id, COUNT(DISTINCT ip) uniqueperday 
FROM visitors_counter 
GROUP BY DATE(date), page_id

The above query returns the number of unique ip visits per page per day.

Answer 2

for your result you should use the group by and count(*) (you have two times the same id for page 37 and want result 3)

SELECT DATE(date) Date, page_id, COUNT(*) visitperday 
FROM visitors_counter 
GROUP BY DATE(date), page_id

othewise the Giorgios is the right one

Answer 3

You can use aggregation on page and date to find count of distinct visitors per page per day. Also, use user variables to generate sequence id.

set @id := 0;

select @id = @id + 1 id,
    page_id,
    count(distinct ip) visitors,
    min(date)
from visitors_counter
group by page_id, DATE(date)
order by visitors desc, page_id;