Question

I need to select past 30 days data and find the no: rows….i am getting a warning if i am calculating the no: rows. So is there any other alternative to find no: rows in the selected section…..my code is:

$thirty_reg=mysql_query("SELECT * FROM user ORDER BY user.date DESC LIMIT 30");

$num_thirty=mysql_num_rows($thirty_reg);

echo $num_thirty;

A better suggestion to select the past 30 days data also is needed…

Answer 1

Modify your query to this to return rows for the past 30 days.

SELECT column FROM user WHERE user.date BETWEEN DATE_SUB(NOW(), INTERVAL 30 DAY) AND NOW()

However, I would recommend fetching the count of rows rather than a record set like so:

SELECT COUNT(*) FROM user WHERE user.date BETWEEN DATE_SUB(NOW(), INTERVAL 30 DAY) AND NOW()