问题SQL语句的结果

我有以下情形使用SQL语句，实现我分配到组分流，GX，GY一个问题：问题SQL语句的结果

组分流 - >组GX

组GX - >组分流

组分流 - >组GY

我想只提取第一次，当我的问题是分配到分诊组而忽略其他，我想这样做但总是不好的结果（回顾所有行当分配到分诊组问题）

SQL语句：

select g.created ,ji.pkey as issueName 
    from changegroup g 
    join changeitem ci on (ci.groupid = g.id) 
    join jiraissue ji on (ji.id = g.issueid) 
    join project p on (p.id = ji.project) 
    join priority pr on (pr.id = ji.priority) 
    where ci.field = 'Group' 
    and ci.oldString = 'Triage' 
    and p.pname = 'Test' 
    and pr.pname='P3' 
    and ji.created between '2011-08-11 14:01:00' and '2011-08-12 14:11:00'

语句的结果（正如你看到的，因此请求检索2行中的问题200被分配到组分流2次）：

enter image description here

表changegroup具有这种结构：

enter image description here

表changeitem具有这样的结构： enter image description here

来源

2011-08-18 rym

试试这一个。但它可以很慢查询

select g.created, ji.pkey as issueName 
from changegroup g 
join jiraissue ji on (ji.id = g.issueid) 
where (g.created, issueName) in (
select min(g.created) ,ji.pkey as issueName 
from changegroup g 
join changeitem ci on (ci.groupid = g.id) 
join jiraissue ji on (ji.id = g.issueid) 
join project p on (p.id = ji.project) 
join priority pr on (pr.id = ji.priority) 
where ci.field = 'Group' 
and ci.oldString = 'Triage' 
and p.pname = 'Test' 
and pr.pname='P3' 
and ji.created between '2011-08-11 14:01:00' and '2011-08-12 14:11:00' 
group by issueName 
)

来源

2011-08-18 09:55:31

问题SQL语句的结果

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