从mysql获取今天的不同日期

Question

I'm trying to select the distinct IPs from all time from today's date, and it returned 39 rows, but it's suppose to be less, since some of the IPs aren't distinct since they visited from before today. What am I doing wrong?

SELECT DISTINCT (ip), DATE AS tempDate
FROM  `ipAll` 
HAVING tempDate =  '2015-12-29'
LIMIT 100

Answer 1

You should be using a WHERE condition rather like below. Assuming that you have a date type column named tempdate where you store the visited datetime.

SELECT DISTINCT ip
FROM  `ipAll` 
WHERE tempDate =  CURDATE();

Answer 2

Instead of HAVING clause use WHERE CLAUSE and get rid of the quotes on the table name. HAVING CLAUSE is used when you use GROUP BY clause.