I have 3 tables :
Teams (id_team, name, id_season)
Seasons (id_season, name, nbr_teams)
Teams_Stats (id_stats, id_game, id_team, victory, defeat, draw)
I have 3 queries that are working fine individually :
SELECT T.name, count(TS.victory) as Wins
FROM Teams T
JOIN Seasons S ON T.id_season = S.id_season AND S.name = '2015'
LEFT JOIN Teams_Stats TS ON TS.id_team = T.id_team AND TS.victory = 1
GROUP BY T.name
ORDER BY T.name
SELECT T.name, count(TS.defeat) as Losses
FROM Teams T
JOIN Seasons S ON T.id_season = S.id_season AND S.name = '2015'
LEFT JOIN Teams_Stats TS ON TS.id_team = T.id_team AND TS.defeat = 1
GROUP BY T.name
ORDER BY T.name
SELECT T.name, count(TS.victory) as Draws
FROM Teams T
JOIN Seasons S ON T.id_season = S.id_season AND S.name = '2015'
LEFT JOIN Teams_Stats TS ON TS.id_team = T.id_team AND TS.draw = 1
GROUP BY T.name
ORDER BY T.name
I was wondering how can I can get the same result but within only 1 query. I just can't get it ? Maybe someone can throw some light ...
I appreciate,
Thanks.
You can use conditional aggregation:
SELECT T.name,
sum(TS.victory=1) as Wins,
sum(TS.defeat=1) as Losses,
sum(TS.draw =1) as Draws
FROM Teams T
JOIN Seasons S ON T.id_season = S.id_season AND S.name = '2015'
LEFT JOIN Teams_Stats TS ON TS.id_team = T.id_team
GROUP BY T.name
ORDER BY T.name
Demo here
Related
This is my code i am trying to left join the latest team data, not every piece of data. i have tried just using limit 1 but doesnt return anything
ORDER BY updated DESC LIMIT 1
this doesnt work
Any ideas?
$sql = "SELECT
events.id, events.time,events.status, events.home_team,events.away_team,events.league,
ht.id as home_id,ht.name as home_name,at.name as away_name,
statistics.home_goals,statistics.away_goals,statistics.time as game_time,
leagues.id as league_id,leagues.name as league_name,leagues.type as league_type,
country.name as country_name,country.logo,
hts.home_scored, ats.away_scored,
hts.home_conceeded,ats.away_conceeded,
hts.home_win,ats.away_win,
hts.home_15,ats.away_15,
hts.home_25,ats.away_25,
hts.home_btts, ats.away_btts,
hts.home_fts, ats.away_fts,
hts.home_cs, ats.away_cs,
hts.home_corners_for, ats.away_corners_for,
hts.home_corners_against, ats.away_corners_against,
hts.home_cards, ats.away_cards
FROM events
LEFT JOIN teams ht
ON ht.id = events.home_team
LEFT JOIN teams at
ON at.id = events.away_team
LEFT JOIN leagues
ON leagues.id = events.league
LEFT JOIN country
ON country.id=leagues.country
LEFT JOIN ( SELECT team,home_scored,home_conceeded,home_win,home_15,home_25,home_btts,home_fts,home_cs,home_corners_for,home_corners_against,home_cards FROM team_quick_stats ORDER BY updated DESC) hts
ON ht.id=hts.team
LEFT JOIN ( SELECT team,away_scored,away_conceeded,away_win,away_15,away_25,away_btts,away_fts,away_cs,away_corners_for,away_corners_against,away_cards FROM team_quick_stats ORDER BY updated DESC) ats
ON at.id=ats.team
LEFT JOIN statistics
ON statistics.event_id=events.id
WHERE (events.time BETWEEN $start AND $end) ORDER BY country.list_order, leagues.country ASC , leagues.id ASC, events.time ASC, home_name ASC";
Here's one way. Replace LEFT JOIN (SELECT team... etc....) ats with...
LEFT
JOIN
( SELECT x.team
, x.etc...
FROM team_quick_stats x
JOIN
( SELECT team
, MAX(updated) updated
FROM team_quick_stats
GROUP
BY team
) y
ON y.team = x.team
AND y.updated = x.updated
) ats...
SELECT posts, its last 3 comments and count of all comments
My code:
SELECT p.*, u.id, u.username username, u.usersurname usersurname, u.usermainphoto userphoto, GROUP_CONCAT(c.text SEPARATOR 'a!k#h#md%o^v&') commenttext,GROUP_CONCAT(c.likes SEPARATOR '-') commentlikes,GROUP_CONCAT(c.dislikes SEPARATOR '-') commentdislikes, GROUP_CONCAT(c.commentdate) commentdate, GROUP_CONCAT(u2.username) commentauthorname, GROUP_CONCAT(c.anonim) commentanonym, GROUP_CONCAT(c.id) commentid, GROUP_CONCAT(u2.id) commentauthorid, GROUP_CONCAT(u2.usersurname) commentauthorsurname, GROUP_CONCAT(u2.usermainphoto) commentauthorphoto, GROUP_CONCAT(c.commentphotoid) commentphotoid
FROM posts p
LEFT JOIN comments c ON c.post = p.postid AND c.commentdel=0
LEFT JOIN users u ON u.id = p.postauthorid
LEFT JOIN users u2 ON u2.id = c.author
WHERE p.postwallid = :id AND p.postdel=0
GROUP BY postid
ORDER BY postid DESC
it gives me all comments, but I need only 3
You need a timestamp or counter of something to determine which comments are the three you want. Add that column name between the angle brackets below.
SELECT p.*, u.id, u.username username, u.usersurname usersurname, u.usermainphoto userphoto, GROUP_CONCAT(c.text SEPARATOR 'a!k#h#md%o^v&') commenttext,GROUP_CONCAT(c.likes SEPARATOR '-') commentlikes,GROUP_CONCAT(c.dislikes SEPARATOR '-') commentdislikes, GROUP_CONCAT(c.commentdate) commentdate, GROUP_CONCAT(u2.username) commentauthorname, GROUP_CONCAT(c.anonim) commentanonym, GROUP_CONCAT(c.id) commentid, GROUP_CONCAT(u2.id) commentauthorid, GROUP_CONCAT(u2.usersurname) commentauthorsurname, GROUP_CONCAT(u2.usermainphoto) commentauthorphoto, GROUP_CONCAT(c.commentphotoid) commentphotoid
FROM posts p
LEFT JOIN comments c ON c.post = p.postid AND c.commentdel = 0
LEFT JOIN users u ON u.id = p.postauthorid
LEFT JOIN users u2 ON u2.id = c.author
WHERE p.postwallid = :id AND p.postdel = 0
and (
select count(*) from comments as c2
where c2.postid = p.postid and c2.commentdel = 0
and c2.<timestamp> <= c.timestamp
) < 3
GROUP BY postid
ORDER BY postid DESC
Edit: I didn't add the count of all comments. I think you can easily add it with another subquery in the select list but I know MySQL people don't like subqueries very much.
(
select count(*) from comments as c2
where c2.postid = c.postid and c2.commentdel = 0
) as comment_count
I add in SELECT count(postid) as all_comments and at the end LIMIT 0, 3
SELECT count(postid) as all_comments, p.*, u.id, u.username username, u.usersurname usersurname, u.usermainphoto userphoto, GROUP_CONCAT(c.text SEPARATOR 'a!k#h#md%o^v&') commenttext,GROUP_CONCAT(c.likes SEPARATOR '-') commentlikes,GROUP_CONCAT(c.dislikes SEPARATOR '-') commentdislikes, GROUP_CONCAT(c.commentdate) commentdate, GROUP_CONCAT(u2.username) commentauthorname, GROUP_CONCAT(c.anonim) commentanonym, GROUP_CONCAT(c.id) commentid, GROUP_CONCAT(u2.id) commentauthorid, GROUP_CONCAT(u2.usersurname) commentauthorsurname, GROUP_CONCAT(u2.usermainphoto) commentauthorphoto, GROUP_CONCAT(c.commentphotoid) commentphotoid
FROM posts p
LEFT JOIN comments c ON c.post = p.postid AND c.commentdel=0
LEFT JOIN users u ON u.id = p.postauthorid
LEFT JOIN users u2 ON u2.id = c.author
WHERE p.postwallid = :id AND p.postdel=0
GROUP BY postid
ORDER BY postid DESC
LIMIT 0, 3
i create a web app like facebook by php and mysqli
in my app i have a table for posts , one table for likes , and one table for comments
i want to get the number of comments and likes of each post in one row with his post_id!!!
i try some querys likes this :
select `tblpost`.`post_id`, COALESCE(TCOMM.`comment_num`,0) as `c_num`, COALESCE(TLIKE.`like_num`,0) as `l_num`
from
(select `tblpost`.`post_id`, count(*) as `like_num` from `tblpost` join `tbllikes` on `tbllikes`.`post_id` = `tblpost`.`post_id` group by `tblpost`.`post_id`
) TLIKE
inner join
(select `tblpost`.`post_id`, count(*) as `comment_num` from `tblpost` join `tblcomments` on `tblcomments`.`post_id` = `tblpost`.`post_id` group by `tblpost`.`post_id`) TCOMM
on
TCOMM.`post_id` = TLIKE.`post_id`
but i don't know what's my problem
You can do count distincts with two left joins.
Something like this would work if there are fields like_id and comment_id in the tables tbllikes and tblcomments
SELECT
tblpost.post_id AS post_id,
COUNT(DISTINCT tbllikes.like_id) AS likes,
COUNT(DiSTINCT tblcomments.comment_id) AS comments
FROM tblpost
LEFT JOIN tbllikes ON tbllikes.post_id = tblpost.post_id
LEFT JOIN tblcomments on tblcomments.post_id = tblpost.post_id
GROUP BY tblpost.post_id
First, I think you can greatly simplify your query:
select l.post_id,
COALESCE(c.comment_num, 0) as c_num, COALESCE(l.like_num, 0) as l_num
from (select l.post_id, count(*) as like_num
from tbllikes l
group by l.post_id
) l inner join
(select c.post_id, count(*) as comment_num
from tblcomments c
group by c.post_id
) c
on l.post_id = c.post_id;
This will only get you posts that have both likes and comments. To get what you want, use a left join:
select p.post_id,
COALESCE(c.comment_num, 0) as c_num, COALESCE(l.like_num, 0) as l_num
from tblpost p left join
(select l.post_id, count(*) as like_num
from tbllikes l
group by l.post_id
) l
on l.post_id = p.post_id left join
(select c.post_id, count(*) as comment_num
from tblcomments c
group by c.post_id
) c
on c.post_id = p.post_id;
this is my query
SELECT a.id,
a.venue_id,
a.user_id,
m1.profilenam AS user_profilename,
m1.photo_thumb AS user_photo_thumb,
m2.profilenam AS venue_profilename,
m2.photo_thumb AS venue_photo_thumb
FROM announce_arrival AS a
INNER JOIN members AS m1
ON a.user_id = m1.mem_id
INNER JOIN members AS m2
ON a.venue_id = m2.mem_id
GROUP BY a.venue_id, a.user_id
LIMIT 0,10
ORDER BY date DESC,
time DESC
How can i use count(*) on this query,i use like this
SELECT DISTINCT COUNT(*)
FROM announce_arrival AS a
INNER JOIN members as m1 ON (a.user_id = m1.mem_id)
INNER JOIN members as m2 ON (a.venue_id= m2.mem_id)
GROUP BY a.venue_id, a.user_id LIMIT 0,10 ORDER BY date DESC,time DESC;
but its showing
COUNT(*)
7
3
1
i want total count .
You can wrap your query into select count(*), like this:
SELECT COUNT(*) FROM
(SELECT a.id,a.venue_id, a.user_id, m1.profilenam as
user_profilename,m1.photo_thumb AS user_photo_thumb,m2.profilenam AS
venue_profilename, m2.photo_thumb AS venue_photo_thumb FROM announce_arrival
AS a INNER JOIN members as m1 ON (a.user_id = m1.mem_id) INNER JOIN members
as m2 ON (a.venue_id= m2.mem_id) GROUP BY a.venue_id, a.user_id)
You can wrap your query in another SELECT:
SELECT COUNT(*) AS total FROM (
SELECT DISTINCT COUNT(*)
FROM announce_arrival AS a
INNER JOIN members as m1 ON (a.user_id = m1.mem_id)
INNER JOIN members as m2 ON (a.venue_id= m2.mem_id)
GROUP BY a.venue_id, a.user_id LIMIT 0,10 ORDER BY date DESC,time DESC) AS t
or if you want sum of all DISTINCT COUNT(*) try:
SELECT SUM(cnt) AS total FROM (
SELECT DISTINCT COUNT(*) AS cnt
FROM announce_arrival AS a
INNER JOIN members as m1 ON (a.user_id = m1.mem_id)
INNER JOIN members as m2 ON (a.venue_id= m2.mem_id)
GROUP BY a.venue_id, a.user_id LIMIT 0,10 ORDER BY date DESC,time DESC) AS t
From docs about found_rows():
To obtain this row count, include a
SQL_CALC_FOUND_ROWS option in the
SELECT statement, and then invoke
FOUND_ROWS() afterward:
mysql> SELECT SQL_CALC_FOUND_ROWS * FROM tbl_name WHERE id > 100 LIMIT 10;
mysql> SELECT FOUND_ROWS();
The second SELECT returns a number
indicating how many rows the first
SELECT would have returned had it been
written without the LIMIT clause.
I.e., add SQL_CALC_FOUND_ROWS after SELECT in your first query and replace second query with SELECT FOUND_ROWS().
Get rid of GROUP BY, LIMIT and ORDER. They are useless and don't make sense (especially LIMIT) if you need a total count. DISTINCT doesn't make sense either.
SELECT COUNT(*)
FROM announce_arrival AS a
INNER JOIN members as m1 ON (a.user_id = m1.mem_id)
INNER JOIN members as m2 ON (a.venue_id= m2.mem_id)
Try this
SELECT COUNT(a.user_id)
FROM announce_arrival AS a
INNER JOIN members as m1 ON (a.user_id = m1.mem_id)
INNER JOIN members as m2 ON (a.venue_id= m2.mem_id)
GROUP BY a.user_id LIMIT 0,10;
If you are using count no need to give order by
Hello can anybody see why this query fails?
SELECT A.idAd, A.ads_in_Cat, A.title, A.currency, A.price,
A.in_dpt, A.description, A.featured FROM ads A
LEFT JOIN featured F ON F.ad = A.idAd
INNER JOIN dept D ON D.id_dept = A.in_dpt
INNER JOIN sub_cat_ad S ON S.id_sub_cat = A.ads_in_Cat
INNER JOIN cat_ad C ON C.idCat_ad = S.from_cat_ad
ORDER BY A.featured DESC LIMIT :limit, :offset
But this one works:
SELECT *FROM ads
LEFT JOIN featured ON featured.ad = ads.idAd
INNER JOIN dept ON dept.id_dept = ads.in_dpt
INNER JOIN sub_cat_ad ON id_sub_cat = ads.ads_in_Cat
INNER JOIN cat_ad ON idCat_ad = sub_cat_ad.from_cat_ad
ORDER BY featured DESC LIMIT :limit, :offset
In the first one, I don't want all columns from the table "ads", the query returns only columns till ...FROM ads A.
If you specify to only select fields from A that's what you get: Only fields from A.
If you want fields from other tables too you have to specify them as well.
SELECT
A.idAd, A.ads_in_Cat, A.title, A.currency, A.price, A.in_dpt, A.description, A.featured,
F.*,
D.*,
S.*,
C.*
FROM ads A
LEFT JOIN featured F ON F.ad = A.idAd
INNER JOIN dept D ON D.id_dept = A.in_dpt
INNER JOIN sub_cat_ad S ON S.id_sub_cat = A.ads_in_Cat
INNER JOIN cat_ad C ON C.idCat_ad = S.from_cat_ad
ORDER BY A.featured DESC LIMIT :limit, :offset