按特定类别从数据库中获取博客

Question

我已经创建了一个包含类别的博客系统，我在数据库中有两个表，表 blogs 带有 blog_id、title、body、category_id，第二个表带有列 category、category_id。要从所有类别中获取博客，我使用此代码并且效果很好。

  $query = ("SELECT blogs_id, title, body, posted_by, category FROM blogs  INNER JOIN categories ON categories.category_id=blogs.category_id  ORDER BY  blogs_id desc LIMIT 10");
 $result = mysql_query($query);
 $result = mysql_query($query) or die("error:".mysql_error());
 while ($row = mysql_fetch_assoc($result)) {
        $title = $row['title'];
        $body = $row['body']; 
        $posted_by = $row['posted_by'];

现在我想按特定类别获取博客，我使用了相同的查询并添加了“where category=that category”它不起作用所以我尝试了category_id，但它也失败了。我的代码是这样的

        $query = ("SELECT blogs_id, title, body, posted_by, category FROM blogs INNER JOIN categories ON categories.category_id=blogs.category_id where category=anycategory ORDER BY blogs_id desc LIMIT 10");

Answer 1

在where 子句上使用'。

$query = ("SELECT blogs_id, title, body, posted_by, category 
FROM blogs INNER
JOIN categories ON categories.category_id=blogs.category_id 
where category= 'anycategory'
ORDER BY blogs_id desc LIMIT 10");

并且确保有一个表格字段在您的表格中调用category