Mysql equivalent oracle sql query is required

Question

Hi all,
please help me convert mysql quyery into sql query.
select u.username, t.name as fullname, p.id as project_id, p.name as project,
                         (select count(a.resource_id) from pd_resource_task_alloc as a left OUTER JOIN pd_resource_task as b on a.task_id=b.task_id where a.task_id=t.id )  as allocatedTask,
                         (select count(a.resource_id) from pd_resource_task_alloc as a left OUTER JOIN pd_resource_task as b on a.task_id=b.task_id where a.task_id=t.id and b.task_status_id='2') as completedTask,
                         (select count(a.resource_id) from pd_resource_task_alloc as a left OUTER JOIN pd_resource_task as b on a.task_id=b.task_id where a.task_id=t.id and b.task_status_id!='2') as pendingTask,
                         c.name as category, sub.task_id, t.name, sub.bucket_date, sum(sub.alloc_time) as s
                         from (select rt.task_id, rt.resource_id, rt.project_id, rta.sequence, rta.alloc_time,DATE(th.creation_date) as creation_date,rt.start_date,th.task_status_id,rt.start_date as bucket_date from resource_task rt, resource_task_alloc rta ,task_history th
                         where rt.task_id = rta.task_id and rt.task_id = th.task_id and th.task_status_id >=2
                         and rt.resource_id = rta.resource_id and rt.project_id = rta.project_id
                         and rta.alloc_time > 0 and rt.start_date is not null ) as sub,
                         pd_tool_user u, pd_task t, pd_project p, pd_category c where sub.resource_id = u.id
                         and sub.start_date >='2011-11-01' and sub.creation_date <= '2011-11-31'
                         and sub.task_id = t.id and sub.project_id = p.id and
                         t.category_id = c.id
                         and sub.project_id='355'
                         group by p.project, u.username, p.id , u.name, sub.task_id, t.name, c.name,
                         sub.bucket_date order by u.username, sub.bucket_date, p.name, c.nameThanks,
P Prakash

Answer 1

Not sure as we don't have any tables and data to work with, but firstly...
a) format your code to make it easier to see what's going on
b) don't mix ansi joins with regular joins
c) treat DATEs as DATEs
d) Table alias names don't use the "AS" keyword
First guess (obviously unteseted)...
select u.username
      ,t.name as fullname
      ,p.id as project_id
      ,p.name as project
      ,(select count(a.resource_id)
        from   pd_resource_task_alloc a
               left OUTER JOIN pd_resource_task b on (a.task_id=b.task_id)
        where  a.task_id=t.id
       ) as allocatedTask
      ,(select count(a.resource_id)
        from   pd_resource_task_alloc a
               left OUTER JOIN pd_resource_task b on (a.task_id=b.task_id)
        where  a.task_id=t.id
        and    b.task_status_id='2'
       ) as completedTask
      ,(select count(a.resource_id)
        from   pd_resource_task_alloc a
               left OUTER JOIN pd_resource_task b on (a.task_id=b.task_id)
        where  a.task_id=t.id
        and    b.task_status_id!='2'
       ) as pendingTask
      ,c.name as category
      ,sub.task_id
      ,t.name
      ,sub.bucket_date
      ,sum(sub.alloc_time) as s
from   (select rt.task_id
              ,rt.resource_id
              ,rt.project_id
              ,rta.sequence
              ,rta.alloc_time
              ,th.creation_date -- assuming creation_date is a DATE datatype?
              ,rt.start_date
              ,th.task_status_id
              ,rt.start_date as bucket_date
        from   resource_task rt
               join resource_task_alloc rta on (rt.task_id = rta.task_id
                                            and rt.resource_id = rta.resource_id
                                            and rt.project_id = rta.project_id)
               join task_history th on (rt.task_id = th.task_id)
        where  th.task_status_id >=2
        and    rta.alloc_time > 0
        and    rt.start_date is not null
       ) sub
       join pd_tool_user u on (sub.resource_id = u.id)
       join pd_task t on (sub.task_id = t.id)
       join pd_project p on (sub.project_id = p.id)
       join pd_category c on (t.category_id = c.id)
where  sub.start_date >= to_date('2011-11-01','YYYY-MM-DD') -- assuming start_date is a DATE datatype
and    sub.creation_date <= to_date('2011-11-31','YYYY-MM-DD') -- assuming creation_date is a DATE datatype
and    sub.project_id='355'
group by p.project
        ,u.username
        ,p.id
        ,u.name
        ,sub.task_id
        ,t.name
        ,c.name
        ,sub.bucket_date
order by u.username
        ,sub.bucket_date
        ,p.name
        ,c.name