MySQL的返回结果只有一个，而不是多个

Question

我有一个具有多个ID为给定的标准SQL表：

mysql> select distinct id from FILTER where ft='f' and timestamp between '1367539200000' and '1367625599999'; 
+-----+ 
| id | 
+-----+ 
| 0 | 
| 121 | 
| 122 | 
| 124 | 
| 125 | 
| 127 | 
+-----+ 
6 rows in set (0.00 sec) 

mysql> 

我想运行一个查询，将给予所有6列结果：

mysql> select a.id, count(a.id) as total, SUM(CASE WHEN b.result='0' THEN 1 ELSE 0 END) AS allowed, SUM(CASE WHEN b.result='1' THEN 1 ELSE 0 END) AS modified, SUM(CASE WHEN b.result='2' THEN 1 ELSE 0 END) AS blocked from FILTER a INNER JOIN EVENTS b on a.fid = b.event_id and a.timestamp = b.timestamp where b.protocol_type='MM4' and a.ft='f' and a.id in ('0', '121', '122', '124', '125', '127') and a.fid=b.event_id and b.timestamp between '1367539200000' and '1367625599999'; 
+----+-------+---------+----------+---------+ 
| id | total | allowed | modified | blocked | 
+----+-------+---------+----------+---------+ 
| 0 | 216 |  0 |  135 |  81 | 
+----+-------+---------+----------+---------+ 
1 row in set (0.01 sec) 

mysql> 

这只返回第一行。我可以确认的是，其他ID fulfuls的一个过滤条件（其实他们都做）：

mysql> select a.id, count(a.id) as total, SUM(CASE WHEN b.result='0' THEN 1 ELSE 0 END) AS allowed, SUM(CASE WHEN b.result='1' THEN 1 ELSE 0 END) AS modified, SUM(CASE WHEN b.result='2' THEN 1 ELSE 0 END) AS blocked from FILTER a INNER JOIN EVENTS b on a.fid = b.event_id and a.timestamp = b.timestamp where b.protocol_type='MM4' and a.ft='f' and a.id='127' and a.fid=b.event_id and b.timestamp between '1367539200000' and '1367625599999'; 
+-----+-------+---------+----------+---------+ 
| id | total | allowed | modified | blocked | 
+-----+-------+---------+----------+---------+ 
| 127 | 24 |  0 |  15 |  9 | 
+-----+-------+---------+----------+---------+ 
1 row in set (0.00 sec) 

mysql> 

我也试过没有在名单：

mysql> select a.id, count(a.id) as total, SUM(CASE WHEN b.result='0' THEN 1 ELSE 0 END) AS allowed, SUM(CASE WHEN b.result='1' THEN 1 ELSE 0 END) AS modified, SUM(CASE WHEN b.result='2' THEN 1 ELSE 0 END) AS blocked from FILTER a INNER JOIN EVENTS b on a.fid = b.event_id and a.timestamp = b.timestamp where b.protocol_type='MM4' and a.ft='f' and a.fid=b.event_id and b.timestamp between '1367539200000' and '1367625599999'; 
+----+-------+---------+----------+---------+ 
| id | total | allowed | modified | blocked | 
+----+-------+---------+----------+---------+ 
| 0 | 216 |  0 |  135 |  81 | 
+----+-------+---------+----------+---------+ 
1 row in set (0.00 sec) 

mysql> 

我怎样才能改变我的过滤器为每个id显示6行而不是仅显示第一行？

一个

Answer 1

count和sum都是聚合功能。用group by条款，您可以按id（唯一）进行分组并显示全部。

Answer 2

很难说没有看到所有的表结构，但可以尝试在一个GROUP BY在查询的末尾：

... your query as posted, with ... 
GROUP BY a.id 

没有GROUP BY你指示的MySQL给你总计总数而不是ID总数。

Answer 3

select a.id, 
count(a.id) as total, 
SUM(CASE WHEN b.result='0' THEN 1 ELSE 0 END) AS allowed, 
SUM(CASE WHEN b.result='1' THEN 1 ELSE 0 END) AS modified, 
SUM(CASE WHEN b.result='2' THEN 1 ELSE 0 END) AS blocked 
from FILTER a INNER JOIN EVENTS b on a.fid = b.event_id and a.timestamp = b.timestamp 
where b.protocol_type = 'MM4' 
and a.ft = 'f' 
and a.fid = b.event_id 
and b.timestamp between '1367539200000' and '1367625599999' 
GROUP BY a.id 

Answer 4

事情是这样的：

select 
    a.id, 
    count(a.id) as total, 
    SUM(
     CASE WHEN b.result='0' THEN 1 
     ELSE 0 
     END 
    ) AS allowed, 
    SUM(
     CASE WHEN b.result='1' THEN 1 
     ELSE 0 
     END 
    ) AS modified, 
    SUM(
     CASE WHEN b.result='2' THEN 1 
     ELSE 0 
     END 
    ) AS blocked 
from FILTER a 
    INNER JOIN EVENTS b on a.fid = b.event_id 
     and a.timestamp = b.timestamp 
where b.protocol_type='MM4' 
    and a.ft='f' 
    and a.id='127' 
    and a.fid=b.event_id 
    and b.timestamp between '1367539200000' and '1367625599999' 
group by a.id;