limit 用法php练习

$sql = "select * from goods order by price desc limit 0,3";去前面三条

$sql = "select * from goods order by price desc limit 3,3";去前面三条

$sql = "select * from goods order by price desc limit 6,3";去前面三条

$sql = "select * from goods order by price desc limit 9,3";去前面三条

(n-1)*3就是他的规律.分页原理就迎刃而解了

//倒序排列 显示3条

可以用来做分页,下面讲讲他的原理: