Given the following table setup
Table
column1
column2
forumCategory
ID
name
forum
ID
name
forumCategoryID
ForumTopics
ID
forumID
ForumTopicMsg
ID
topicID
dateEntered
I am attempting to create a query that gives a complete overview which will
show all the forumCategory's , followed by all its forums while giving a
count of all topics belonging to that forum, counting all msgs belonging to
that topic, and the date of the last msg belonging to that topic.
forumCategory.n ame
forum.name, Count(forumTopi cs.ID), Count(forumTopi cMsg.ID),
Newest(forumTop icMsg.dateEnter ed)
forum.name, Count(forumTopi cs.ID), Count(forumTopi cMsg.ID),
Newest(forumTop icMsg.dateEnter ed)
forum.name, Count(forumTopi cs.ID), Count(forumTopi cMsg.ID),
Newest(forumTop icMsg.dateEnter ed)
forum.name, Count(forumTopi cs.ID), Count(forumTopi cMsg.ID),
Newest(forumTop icMsg.dateEnter ed)
forumCategory.n ame
forum.name, Count(forumTopi cs.ID), Count(forumTopi cMsg.ID),
Newest(forumTop icMsg.dateEnter ed)
forum.name, Count(forumTopi cs.ID), Count(forumTopi cMsg.ID),
Newest(forumTop icMsg.dateEnter ed)
forum.name, Count(forumTopi cs.ID), Count(forumTopi cMsg.ID),
Newest(forumTop icMsg.dateEnter ed)
forum.name, Count(forumTopi cs.ID), Count(forumTopi cMsg.ID),
Newest(forumTop icMsg.dateEnter ed)
forumCategory.n ame
forum.name, Count(forumTopi cs.ID), Count(forumTopi cMsg.ID),
Newest(forumTop icMsg.dateEnter ed)
forum.name, Count(forumTopi cs.ID), Count(forumTopi cMsg.ID),
Newest(forumTop icMsg.dateEnter ed)
forum.name, Count(forumTopi cs.ID), Count(forumTopi cMsg.ID),
Newest(forumTop icMsg.dateEnter ed)
forum.name, Count(forumTopi cs.ID), Count(forumTopi cMsg.ID),
Newest(forumTop icMsg.dateEnter ed)
I cannot figure out how to maintain a relationship across all table and
still returning all info. This is further compounded by the fact that I
need to also return the forum.name even if no topic(s) yet exist for that
forum. So my attempts at using a group by clause have failed. I would
appreciate any help or insight anyone could offer. 4 1240
I think this will do it:
select
ForumCategory = fc.name,
ForumName = f.name,
NumberOfTopics = count(ft.id),
NumberOfMsgs = count(ftm.id),
LastUpdate = (Select max(dateentered ) from ForumTopicMsg where topicid =
ft.id)
from forumCategory as fc
inner join forum as f
on (fc.id=f.forumC ategoryID)
inner join forumTopics a ft
on (f.ID=ft.forumI D)
inner join forumTopicMsg as ftm
on (ft.id=ftm.topi cid)
group by fc.name, f.name
But a couple other things. You should really keep your foreign key
information consistent, there should be only one "id" that points to a
primary key of another table. For example:
forumCategory
fc_id
fc_name
forum
forum_id
fc_id
forum_name
You can use whatever naming standards you want (like I used both a fc_ and a
<tablename>_ type prefix) - that doesn't matter, so long as it's clear - but
the much bigger issue is that if you call forumCategory.f c_id - it needs to
be called fc_id everywhere else too.
HTH
"Bryan Martin" <sp**@myplacein space.com> wrote in message
news:9y******** ************@tw ister.southeast .rr.com... Given the following table setup
Table column1 column2
forumCategory ID name
forum ID name forumCategoryID
ForumTopics ID forumID
ForumTopicMsg ID topicID dateEntered
I am attempting to create a query that gives a complete overview which will show all the forumCategory's , followed by all its forums while giving a count of all topics belonging to that forum, counting all msgs belonging to that topic, and the date of the last msg belonging to that topic.
forumCategory.n ame forum.name, Count(forumTopi cs.ID), Count(forumTopi cMsg.ID), Newest(forumTop icMsg.dateEnter ed) forum.name, Count(forumTopi cs.ID), Count(forumTopi cMsg.ID), Newest(forumTop icMsg.dateEnter ed) forum.name, Count(forumTopi cs.ID), Count(forumTopi cMsg.ID), Newest(forumTop icMsg.dateEnter ed) forum.name, Count(forumTopi cs.ID), Count(forumTopi cMsg.ID), Newest(forumTop icMsg.dateEnter ed) forumCategory.n ame forum.name, Count(forumTopi cs.ID), Count(forumTopi cMsg.ID), Newest(forumTop icMsg.dateEnter ed) forum.name, Count(forumTopi cs.ID), Count(forumTopi cMsg.ID), Newest(forumTop icMsg.dateEnter ed) forum.name, Count(forumTopi cs.ID), Count(forumTopi cMsg.ID), Newest(forumTop icMsg.dateEnter ed) forum.name, Count(forumTopi cs.ID), Count(forumTopi cMsg.ID), Newest(forumTop icMsg.dateEnter ed) forumCategory.n ame forum.name, Count(forumTopi cs.ID), Count(forumTopi cMsg.ID), Newest(forumTop icMsg.dateEnter ed) forum.name, Count(forumTopi cs.ID), Count(forumTopi cMsg.ID), Newest(forumTop icMsg.dateEnter ed) forum.name, Count(forumTopi cs.ID), Count(forumTopi cMsg.ID), Newest(forumTop icMsg.dateEnter ed) forum.name, Count(forumTopi cs.ID), Count(forumTopi cMsg.ID), Newest(forumTop icMsg.dateEnter ed)
I cannot figure out how to maintain a relationship across all table and still returning all info. This is further compounded by the fact that I need to also return the forum.name even if no topic(s) yet exist for that forum. So my attempts at using a group by clause have failed. I would appreciate any help or insight anyone could offer.
To add to RCS's post
Look at using an OUTER JOIN for those tables where rows may not exit.
Such as
select
ForumCategory = fc.name,
ForumName = f.name,
NumberOfTopics = count(ft.id),
NumberOfMsgs = count(ftm.id),
LastUpdate = (Select max(dateentered ) from ForumTopicMsg where topicid
= ft.id)
from forumCategory as fc
inner join forum as f on (fc.id=f.forumC ategoryID)
LEFT JOIN forumTopics a ft on (f.ID=ft.forumI D)
LEFT JOIN forumTopicMsg as ftm on (ft.id=ftm.topi cid)
group by fc.name, f.name
More information on the types of joins is available in Books online.
John
RCS wrote: I think this will do it:
select ForumCategory = fc.name, ForumName = f.name, NumberOfTopics = count(ft.id), NumberOfMsgs = count(ftm.id), LastUpdate = (Select max(dateentered ) from ForumTopicMsg where
topicid = ft.id) from forumCategory as fc inner join forum as f on (fc.id=f.forumC ategoryID) inner join forumTopics a ft on (f.ID=ft.forumI D) inner join forumTopicMsg as ftm on (ft.id=ftm.topi cid) group by fc.name, f.name
But a couple other things. You should really keep your foreign key information consistent, there should be only one "id" that points to
a primary key of another table. For example:
forumCategory fc_id fc_name
forum forum_id fc_id forum_name
You can use whatever naming standards you want (like I used both a
fc_ and a <tablename>_ type prefix) - that doesn't matter, so long as it's
clear - but the much bigger issue is that if you call forumCategory.f c_id - it
needs to be called fc_id everywhere else too.
HTH
"Bryan Martin" <sp**@myplacein space.com> wrote in message news:9y******** ************@tw ister.southeast .rr.com... Given the following table setup
Table column1 column2
forumCategory ID name
forum ID name forumCategoryID
ForumTopics ID forumID
ForumTopicMsg ID topicID dateEntered
I am attempting to create a query that gives a complete overview
which will show all the forumCategory's , followed by all its forums while
giving a count of all topics belonging to that forum, counting all msgs
belonging to that topic, and the date of the last msg belonging to that
topic. forumCategory.n ame forum.name, Count(forumTopi cs.ID), Count(forumTopi cMsg.ID), Newest(forumTop icMsg.dateEnter ed) forum.name, Count(forumTopi cs.ID), Count(forumTopi cMsg.ID), Newest(forumTop icMsg.dateEnter ed) forum.name, Count(forumTopi cs.ID), Count(forumTopi cMsg.ID), Newest(forumTop icMsg.dateEnter ed) forum.name, Count(forumTopi cs.ID), Count(forumTopi cMsg.ID), Newest(forumTop icMsg.dateEnter ed) forumCategory.n ame forum.name, Count(forumTopi cs.ID), Count(forumTopi cMsg.ID), Newest(forumTop icMsg.dateEnter ed) forum.name, Count(forumTopi cs.ID), Count(forumTopi cMsg.ID), Newest(forumTop icMsg.dateEnter ed) forum.name, Count(forumTopi cs.ID), Count(forumTopi cMsg.ID), Newest(forumTop icMsg.dateEnter ed) forum.name, Count(forumTopi cs.ID), Count(forumTopi cMsg.ID), Newest(forumTop icMsg.dateEnter ed) forumCategory.n ame forum.name, Count(forumTopi cs.ID), Count(forumTopi cMsg.ID), Newest(forumTop icMsg.dateEnter ed) forum.name, Count(forumTopi cs.ID), Count(forumTopi cMsg.ID), Newest(forumTop icMsg.dateEnter ed) forum.name, Count(forumTopi cs.ID), Count(forumTopi cMsg.ID), Newest(forumTop icMsg.dateEnter ed) forum.name, Count(forumTopi cs.ID), Count(forumTopi cMsg.ID), Newest(forumTop icMsg.dateEnter ed)
I cannot figure out how to maintain a relationship across all table
and still returning all info. This is further compounded by the fact
that I need to also return the forum.name even if no topic(s) yet exist
for that forum. So my attempts at using a group by clause have failed. I
would appreciate any help or insight anyone could offer.
Thx RCS and John
"John Bell" <jb************ @hotmail.com> wrote in message
news:11******** **************@ o13g2000cwo.goo glegroups.com.. . To add to RCS's post
Look at using an OUTER JOIN for those tables where rows may not exit. Such as
select ForumCategory = fc.name, ForumName = f.name, NumberOfTopics = count(ft.id), NumberOfMsgs = count(ftm.id), LastUpdate = (Select max(dateentered ) from ForumTopicMsg where topicid = ft.id) from forumCategory as fc inner join forum as f on (fc.id=f.forumC ategoryID) LEFT JOIN forumTopics a ft on (f.ID=ft.forumI D) LEFT JOIN forumTopicMsg as ftm on (ft.id=ftm.topi cid) group by fc.name, f.name
More information on the types of joins is available in Books online.
John
RCS wrote: I think this will do it:
select ForumCategory = fc.name, ForumName = f.name, NumberOfTopics = count(ft.id), NumberOfMsgs = count(ftm.id), LastUpdate = (Select max(dateentered ) from ForumTopicMsg where topicid = ft.id) from forumCategory as fc inner join forum as f on (fc.id=f.forumC ategoryID) inner join forumTopics a ft on (f.ID=ft.forumI D) inner join forumTopicMsg as ftm on (ft.id=ftm.topi cid) group by fc.name, f.name
But a couple other things. You should really keep your foreign key information consistent, there should be only one "id" that points to a primary key of another table. For example:
forumCategory fc_id fc_name
forum forum_id fc_id forum_name
You can use whatever naming standards you want (like I used both a fc_ and a <tablename>_ type prefix) - that doesn't matter, so long as it's clear - but the much bigger issue is that if you call forumCategory.f c_id - it needs to be called fc_id everywhere else too.
HTH
"Bryan Martin" <sp**@myplacein space.com> wrote in message news:9y******** ************@tw ister.southeast .rr.com... > Given the following table setup > > Table > column1 > column2 > > forumCategory > ID > name > > forum > ID > name > forumCategoryID > > ForumTopics > ID > forumID > > ForumTopicMsg > ID > topicID > dateEntered > > I am attempting to create a query that gives a complete overview which > will show all the forumCategory's , followed by all its forums while giving > a count of all topics belonging to that forum, counting all msgs belonging > to that topic, and the date of the last msg belonging to that topic. > > forumCategory.n ame > forum.name, Count(forumTopi cs.ID), Count(forumTopi cMsg.ID), > Newest(forumTop icMsg.dateEnter ed) > forum.name, Count(forumTopi cs.ID), Count(forumTopi cMsg.ID), > Newest(forumTop icMsg.dateEnter ed) > forum.name, Count(forumTopi cs.ID), Count(forumTopi cMsg.ID), > Newest(forumTop icMsg.dateEnter ed) > forum.name, Count(forumTopi cs.ID), Count(forumTopi cMsg.ID), > Newest(forumTop icMsg.dateEnter ed) > forumCategory.n ame > forum.name, Count(forumTopi cs.ID), Count(forumTopi cMsg.ID), > Newest(forumTop icMsg.dateEnter ed) > forum.name, Count(forumTopi cs.ID), Count(forumTopi cMsg.ID), > Newest(forumTop icMsg.dateEnter ed) > forum.name, Count(forumTopi cs.ID), Count(forumTopi cMsg.ID), > Newest(forumTop icMsg.dateEnter ed) > forum.name, Count(forumTopi cs.ID), Count(forumTopi cMsg.ID), > Newest(forumTop icMsg.dateEnter ed) > forumCategory.n ame > forum.name, Count(forumTopi cs.ID), Count(forumTopi cMsg.ID), > Newest(forumTop icMsg.dateEnter ed) > forum.name, Count(forumTopi cs.ID), Count(forumTopi cMsg.ID), > Newest(forumTop icMsg.dateEnter ed) > forum.name, Count(forumTopi cs.ID), Count(forumTopi cMsg.ID), > Newest(forumTop icMsg.dateEnter ed) > forum.name, Count(forumTopi cs.ID), Count(forumTopi cMsg.ID), > Newest(forumTop icMsg.dateEnter ed) > > I cannot figure out how to maintain a relationship across all table and > still returning all info. This is further compounded by the fact that I > need to also return the forum.name even if no topic(s) yet exist for that > forum. So my attempts at using a group by clause have failed. I would > appreciate any help or insight anyone could offer. > >
Woops - yep, that's right.. with my way, it would only bring back rows if
there were messages in each topic..
Using a left outer join, will bring back the forum level data, and just have
0's for the number of topics, number of msgs and lastupdate should be
blank..
"Bryan Martin" <sp**@myplacein space.com> wrote in message
news:JB******** ************@tw ister.southeast .rr.com... Thx RCS and John
"John Bell" <jb************ @hotmail.com> wrote in message news:11******** **************@ o13g2000cwo.goo glegroups.com.. . To add to RCS's post
Look at using an OUTER JOIN for those tables where rows may not exit. Such as
select ForumCategory = fc.name, ForumName = f.name, NumberOfTopics = count(ft.id), NumberOfMsgs = count(ftm.id), LastUpdate = (Select max(dateentered ) from ForumTopicMsg where topicid = ft.id) from forumCategory as fc inner join forum as f on (fc.id=f.forumC ategoryID) LEFT JOIN forumTopics a ft on (f.ID=ft.forumI D) LEFT JOIN forumTopicMsg as ftm on (ft.id=ftm.topi cid) group by fc.name, f.name
More information on the types of joins is available in Books online.
John
RCS wrote: I think this will do it:
select ForumCategory = fc.name, ForumName = f.name, NumberOfTopics = count(ft.id), NumberOfMsgs = count(ftm.id), LastUpdate = (Select max(dateentered ) from ForumTopicMsg where topicid = ft.id) from forumCategory as fc inner join forum as f on (fc.id=f.forumC ategoryID) inner join forumTopics a ft on (f.ID=ft.forumI D) inner join forumTopicMsg as ftm on (ft.id=ftm.topi cid) group by fc.name, f.name
But a couple other things. You should really keep your foreign key information consistent, there should be only one "id" that points to a primary key of another table. For example:
forumCategory fc_id fc_name
forum forum_id fc_id forum_name
You can use whatever naming standards you want (like I used both a fc_ and a <tablename>_ type prefix) - that doesn't matter, so long as it's clear - but the much bigger issue is that if you call forumCategory.f c_id - it needs to be called fc_id everywhere else too.
HTH
"Bryan Martin" <sp**@myplacein space.com> wrote in message news:9y******** ************@tw ister.southeast .rr.com... > Given the following table setup > > Table > column1 > column2 > > forumCategory > ID > name > > forum > ID > name > forumCategoryID > > ForumTopics > ID > forumID > > ForumTopicMsg > ID > topicID > dateEntered > > I am attempting to create a query that gives a complete overview which > will show all the forumCategory's , followed by all its forums while giving > a count of all topics belonging to that forum, counting all msgs belonging > to that topic, and the date of the last msg belonging to that topic. > > forumCategory.n ame > forum.name, Count(forumTopi cs.ID), Count(forumTopi cMsg.ID), > Newest(forumTop icMsg.dateEnter ed) > forum.name, Count(forumTopi cs.ID), Count(forumTopi cMsg.ID), > Newest(forumTop icMsg.dateEnter ed) > forum.name, Count(forumTopi cs.ID), Count(forumTopi cMsg.ID), > Newest(forumTop icMsg.dateEnter ed) > forum.name, Count(forumTopi cs.ID), Count(forumTopi cMsg.ID), > Newest(forumTop icMsg.dateEnter ed) > forumCategory.n ame > forum.name, Count(forumTopi cs.ID), Count(forumTopi cMsg.ID), > Newest(forumTop icMsg.dateEnter ed) > forum.name, Count(forumTopi cs.ID), Count(forumTopi cMsg.ID), > Newest(forumTop icMsg.dateEnter ed) > forum.name, Count(forumTopi cs.ID), Count(forumTopi cMsg.ID), > Newest(forumTop icMsg.dateEnter ed) > forum.name, Count(forumTopi cs.ID), Count(forumTopi cMsg.ID), > Newest(forumTop icMsg.dateEnter ed) > forumCategory.n ame > forum.name, Count(forumTopi cs.ID), Count(forumTopi cMsg.ID), > Newest(forumTop icMsg.dateEnter ed) > forum.name, Count(forumTopi cs.ID), Count(forumTopi cMsg.ID), > Newest(forumTop icMsg.dateEnter ed) > forum.name, Count(forumTopi cs.ID), Count(forumTopi cMsg.ID), > Newest(forumTop icMsg.dateEnter ed) > forum.name, Count(forumTopi cs.ID), Count(forumTopi cMsg.ID), > Newest(forumTop icMsg.dateEnter ed) > > I cannot figure out how to maintain a relationship across all table and > still returning all info. This is further compounded by the fact that I > need to also return the forum.name even if no topic(s) yet exist for that > forum. So my attempts at using a group by clause have failed. I would > appreciate any help or insight anyone could offer. > >
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