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mysql查询有关问题-80分-包括前面的分

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2016-06-13 12:24:09757browse

mysql查询问题---80分-包括前面的分

本帖最后由 amu1433 于 2015-07-13 12:16:30 编辑 前面发的这个有问题 http://bbs.csdn.net/topics/391071156 重新更正下...

id             name            nid
1               名字1             3
3               名字1             3
4               名字1             3
5               名字1             3

1               名字1             4
2               名字1             4
5               名字1             4

1               名字1             5
3               名字1             5
5               名字1             5


nid 等于3的记录集为1,2,3,4,5
nid 等于4的记录集为1,2,5
nid 等于5的记录集为1,3,5


怎么获取者三个记录集的共同的id
就是ID=1  跟ID=5
------解决思路----------------------
执行
select uid, group_concat(id) as id from tbl_name group by uid

并读取成
$r[3] = explode(',', '1,2,3,4,5');<br />$r[4] = explode(',', '1,2,5');<br />$r[5] = explode(',', '1,3,5');<br /><br />$t = call_user_func_array('array_intersect', $r);<br />print_r($t);
Array<br />(<br />    [0] => 1<br />    [4] => 5<br />)<br /><br />
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