我有这个sql是由其他人帮助的。
$sql ="
select e.*, i.*, group_concat( t.tag separator ',') as tag_list
from nv_entries e
JOIN nv_tags t on t.entrie_id = e.id
LEFT JOIN nv_images i on i.entrie_id = e.id
where t.tag in ( $tag_list )
group by e.id
having count(t.id) = $num_tags ";
结果就是这个(我只在这里显示一个,可能更多):
[1] => Array
(
[id] => 2
[band] => Kids for Cash
[album] => No More Walls E.P.
[label] =>
[year] => 1986
[text] => Text about album kids for cash.
[entrie_id] => 2
[source] => img02_9lch1.png
[tag_list] => tree
)
对于标签,我必须显示entrie具有的所有标签,并突出显示用于获取结果的标签。在这种情况下,[tag_list] => tree
仅显示一个标记,即搜索字段中使用的标记。我的问题是,我怎样才能得到这样的结果?:
...
[tag_list] => tree, green, foo, bar
[used_tags] => tree
)
由于数组也很好,但是当它只是一个项目时请同时请一个数组。
答案 0 :(得分:1)
如果我理解正确,请在条件
中使用> =$sql ="
select e.*, i.*, group_concat( t.tag separator ',') as tag_list
from nv_entries e
LEFT JOIN nv_images i on i.entrie_id = e.id
JOIN nv_tags t on t.entrie_id = e.id
where t.tag in ( $tag_list )
group by e.id
having count(t.id) >= $num_tags ";
ADD
子查询方法:
$sql ="
select e.*, i.*, group_concat( t.tag separator ',') as tag_list
from nv_entries e
JOIN nv_tags t on t.entrie_id in (
select se.id
from nv_entries se
JOIN nv_tags st on st.entrie_id = se.id
where st.tag in ( $tag_list )
group by se.id
having count(st.id) >= $num_tags
)
LEFT JOIN nv_images i on i.entrie_id = e.id
WHERE 1
group by e.id
";
进入子查询我得到至少请求标签的entrie havin的ID列表,然后在主查询中我得到所有的infox
添加固定查询(参见提问者评论)
子查询方法,修复“e”和“t”之间丢失的连接:
$sql ="
select e.*, i.*, group_concat( t.tag separator ',') as tag_list
from nv_entries e
JOIN nv_tags t on t.entrie_id = e.id
LEFT JOIN nv_images i on i.entrie_id = e.id
WHERE e.id in (
select se.id
from nv_entries se
JOIN nv_tags st on st.entrie_id = se.id
where st.tag in ( $tag_list )
group by se.id
having count(st.id) >= $num_tags
)
group by e.id
";