mysql database page logical

2011-05-20  来源:本站原创  分类:Database  人气:54 

mysql database page logical

/ / Based on 0, return 0: error, otherwise the total number of pages
uint get_recs_on_page_of (int page_index, int n_per_page)
{
int n = select count (*) from books;
int page_count;
page_count = n / page_count;
n? (page_count + = n% page_count? 1:0): page_count = 1;

if (page_index> = page_count) return 0;
int offset = page_index * n_per_page;
print (select * from table where ... limit offset, n_per_page);
return page_count;
}

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