MySQL计数所有行和唯一行

Question

I am trying to do exactly what the title says, get the total number of records and the number of records that are unique in a certain column.

What I tried so far

SELECT COUNT(ip) AS visits, ip FROM tracker WHERE time BETWEEN ? AND ? GROUP BY ip

SELECT DISTINCT COUNT(ip) AS visits, ip FROM tracker WHERE time BETWEEN ? AND ?

SELECT DCOUNT(ip) AS visits, DISTINCT(ip) AS `unique` FROM tracker WHERE time BETWEEN ? AND ?

However none of these brought me pleasant feelings.. How can I do this?

Answer 1

I believe that what you need is this

SELECT COUNT(DISTINCT)

So it should be :

SELECT COUNT(DISTINCT ip) AS visits FROM tracker;