J N
asked on
SQL group by and order by statment
Hi,
I am creating a message board for a website i have created i am using mysql and php.
i have the following database(excel file)
Here is my thought process
1. id - auto increment to order by newest created
2. original_id - copies the id value of the first message created and continues to be redundant until the message is deleted.
3. status -
a. active - normal message
b. deleted - message has been moved to trash
c. inactive - message has been completely deleted
4. viewed
a. read - message has not been read
b. unread - message has been read
5. saved - either empty or 'saved'
6. individuals
a. multiple - the message is address to a group (3 or more people)
b. private - 2 people
7. sender / recipient - the sender message is copied for each person in the message including themselves to make separate copies so each user can apply their own settings to the mysql row.
8. composted_ date - date created
9. subject /message - contents of message
the sql statements is as follows
$database='messages' ->name of my database
$sp_query3 ="SELECT * FROM ".$database." WHERE status='active' AND ";
$sp_query3.="saved!='saved ' AND recipient='".$user."' GROUP BY original_id ORDER BY id DESC";
$sp_res3 = mysqli_query($link, $sp_query3) or die( mysqli_error($link));
while($sp_result3= mysqli_fetch_assoc($sp_res 3)){
}
when i run this query it groups the messages fine however it does not order by id whats wrong?
thanks in advance
messages.xls.xlsx
I am creating a message board for a website i have created i am using mysql and php.
i have the following database(excel file)
Here is my thought process
1. id - auto increment to order by newest created
2. original_id - copies the id value of the first message created and continues to be redundant until the message is deleted.
3. status -
a. active - normal message
b. deleted - message has been moved to trash
c. inactive - message has been completely deleted
4. viewed
a. read - message has not been read
b. unread - message has been read
5. saved - either empty or 'saved'
6. individuals
a. multiple - the message is address to a group (3 or more people)
b. private - 2 people
7. sender / recipient - the sender message is copied for each person in the message including themselves to make separate copies so each user can apply their own settings to the mysql row.
8. composted_ date - date created
9. subject /message - contents of message
the sql statements is as follows
$database='messages' ->name of my database
$sp_query3 ="SELECT * FROM ".$database." WHERE status='active' AND ";
$sp_query3.="saved!='saved
$sp_res3 = mysqli_query($link, $sp_query3) or die( mysqli_error($link));
while($sp_result3= mysqli_fetch_assoc($sp_res
}
when i run this query it groups the messages fine however it does not order by id whats wrong?
thanks in advance
messages.xls.xlsx
can you show in a screenshot how the query is being returned ?
ASKER
Array
(
[id] => 7
[original_id] => 7
[status] => active
[viewed] => read
[saved] =>
[individuals] => private
[sender] => jaymenagy
[recipient] => jaymenagy
[composed_date] => 2014-02-10 21:32:06
[subject] =>
[message] =>
whats the plans for this weekend/friday
)
Array
(
[id] => 6
[original_id] => 5
[status] => active
[viewed] => read
[saved] =>
[individuals] => private
[sender] => jaymenagy
[recipient] => jaymenagy
[composed_date] => 2014-02-10 21:31:20
[subject] => Message board
[message] =>
Hey!
So after i spoke with you i thought i would give this a try and it was a tricky one for sure. what do you think?
)
Array
(
[id] => 3
[original_id] => 3
[status] => active
[viewed] => read
[saved] =>
[individuals] => private
[sender] => jaymenagy
[recipient] => jaymenagy
[composed_date] => 2014-02-10 21:29:02
[subject] =>
[message] =>
what are you doing this weekend?
)
Array
(
[id] => 1
[original_id] => 1
[status] => active
[viewed] => read
[saved] =>
[individuals] => private
[sender] => jaymenagy
[recipient] => jaymenagy
[composed_date] => 2014-02-10 21:27:41
[subject] =>
[message] =>
Whats up bud!
)
SOLUTION
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ASKER
So the group by original_id is fine but it is pulling in the wrong id
for example in my excel sheet
for original_id = the highest value of id=21 and i want the 21 record
for example in my excel sheet
for original_id = the highest value of id=21 and i want the 21 record
ASKER
please see above i explained it
ASKER CERTIFIED SOLUTION
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If you're really creating a PHP / SQL application for a message board, that's a little like trying to build a 2001 Chevrolet. The science has all been done and you might find something that is free and open-source by making a Google search. Consider phpBB or any of the systems listed her:
http://en.wikipedia.org/wiki/Comparison_of_Internet_forum_software
http://en.wikipedia.org/wiki/Comparison_of_Internet_forum_software
ASKER
i figured out the solution based partly on the experts answer