MySQL时间戳与低于符号的比较

Question

I made a PHP blog. Everything is up and running except one glitch. I want to display the articles in decreasing order sorted by date. So whenever an article is added to the DB an auto timestamp records the time of insertion.

GLITCH - > i want to display 5 articles per page. I did that easily for the first page by using this

$sql="SELECT id,article_name,article_body,date 
         from articles order by date desc limit 5" ;

Now i want to proceed with the second page and would like the second page to display the articles from where the page 1 left. If there are 10 articles in descending order, page 1 should display the first 5 and page 2 should display the next five.

This logic should work realtime when many articles are added per day. i used this query but it's displaying just 1 row.

$sql="select id,article_name,article_body,unix_timestamp(date) 
           from articles 
           where date < (select unix_timestamp(date)
                 from articles order by date desc limit $n,1 ) 
           order by date desc limit $n,5" ;

$n - the id from where the rows will be extracted.

Answer 1

utilize the offset in sql:

$items_per_page=5;   
$offset=($current_page-1)* $items_per_page;

the sql:

SELECT id,article_name,article_body,date 
         from articles order by date desc LIMIT  $items_per_page OFFSET $offset

Answer 2

try:

select id,article_name,article_body,unix_timestamp(date) 
from articles 
where date < ( select date from articles order by date desc limit $n,1 ) 
order by date desc limit $n,5

where $n should be the last id from previous page