SQL: count rows from 3rd table - mysql

I have 3 tables, the first table is the account_has_account1 where i store the relation between accounts and it's columns are account_id, account_id1, status where account_id is the account doing following to account_id1 and status is an enum type with values active, inactive where active indicates if the account is actually following, if it's inactive, then account stopped following.
the second table is named account_has_photos which i store the photos one account has stored in the database, so it's columns are account_id, photos_id, so i need this table to get all photos from one account which another account is following.
But all these have messages posted on them, and here is where the 3rd table comes which is named photos_has_message_photos, from this table i only need a count of all posted messages in one photo, the columns are photos_id, message_photos_id
for now my query is this:
SELECT account_has_photos.photos_id as id, "photos" as type, account_has_photos.update_at, account_has_photos.account_id
FROM account_has_account1
JOIN account_has_photos
ON (account_has_photos.account_id = account_has_account1.account_id1 AND account_has_photos.type_id = 17)
WHERE account_has_account1.account_id = 7 AND account_has_account1.`status` = "Active"
it shows all photos from accounts on which account id 7 is following, but on my attempts on getting the total messages have failed, i thought on doing an INNER JOIN like this:
INNER JOIN (
SELECT photos_has_message_photos.photos_id, count(photos_has_message_photos.photos_id) as total
FROM photos_has_message_photos
) posts
ON(posts.photos_id = account_has_photos.photos_id)
and then i select from main posts.total, but it does not show any row, not even the photos, the result is empty at this point and i have no idea why and what to do.
the complete query is like this:
SELECT account_has_photos.photos_id as id, "photos" as type, account_has_photos.update_at, account_has_photos.account_id, posts.total
FROM account_has_account1
JOIN account_has_photos
ON (account_has_photos.account_id = account_has_account1.account_id1 AND account_has_photos.type_id = 17)
INNER JOIN (
SELECT photos_has_message_photos.photos_id, count(photos_has_message_photos.photos_id) as total
FROM photos_has_message_photos
) posts
ON(posts.photos_id = account_has_photos.photos_id)
WHERE account_has_account1.account_id = 7 AND account_has_account1.`status` = "Active"
again, i only need a total of rows which are messages from each photos found

Try this query updated inner select
SELECT ahp.photos_id as id, "photos" as type, ahp.update_at, ahp.account_id,posts.total
FROM account_has_account1
JOIN account_has_photos
ON (ahp.account_id = account_has_account1.account_id1 AND ahp.type_id = 17) INNER JOIN (
SELECT phmp.photos_id, count(*) as total FROM photos_has_message_photos GROUP BY phmp.photos_id
) posts
ON(posts.photos_id = ahp.photos_id) WHERE account_has_account1.account_id = 7 AND account_has_account1.`status` = "Active"

Related

MYSQL If at least one result does not match, remove it from

I need to do a very complex search
Context: I have 3 tables: rooms, reservation, and room_reservation. The first one have all info of the rooms in a hotel, the second have info of all reservation and the third is because a reservation have multiple rooms.
I need know what rooms are available in a expecific date, I really close, I need that if at least one data does not match the condition of the search then the related room is not shown.
This is my query:
SELECT DISTINCT hab.* FROM habitacion hab
LEFT OUTER JOIN habitacion_reserva habr ON habr.id_habitacion = hab.id
LEFT OUTER JOIN reserva res ON res.id = habr.id_reserva
WHERE hab.tipo = 1
AND (((( '2018-06-10' not between res.fecha_ingreso and res.fecha_salida) AND ( '2018-06-17' not between res.fecha_ingreso and res.fecha_salida))
OR (res.fecha_ingreso is null OR res.fecha_salida is null)) OR ((( '2018-06-09' between res.fecha_ingreso and res.fecha_salida) OR ( '2018-06-17' between res.fecha_ingreso and res.fecha_salida)) AND res.estado = 4))
In theory the query works but when I have many reservation, the query simply return all rooms.
Try something like this (simplified)
Select * FROM rooms
LEFT JOIN room_reservation ON (rooms.id = rooms_reservation.id)
LEFT JOIN reservations ON (rooms_reservation.id = reservation.id)
reservation
WHERE 1=1
...
AND whateverfield = 1
....
AND ('2018-06-09' NOT BETWEEN reservation.start AND reservation.end)
AND ('2018-06-17' NOT BETWEEN reservation.start AND reservation.end)
GROUP BY rooms

Mysql SUM based on condition

I need help to formulate a query to calculate points based on user action.
There is a user table which stores user info and each user belongs to a specific category (User category). Each category has different levels (say level1, level2 etc..) and each level has a set of tasks(Task1,Task2...) to be completed. Each task can be performed multiple times. But points is calculated based on a maximum limit field.
Task 1 - 10 points ( Max:2 - Means user can perform this task N times but for point calculation it will be only counted twice )
Task 2 - 5 points ( Max:1 )
For example lets say User1 performs Task1 5 times, but for point calculation Task1 will only be counted 2 times , so total points is 20. This is similar for all tasks.
On completing each task the user gains N points and get upgraded to next level.
Please find below the table structure and query:
users
uid , uname , uc_id ( References User Category ) , ul_id (References user level and indicates current level of user )
user_category
uc_id ....
user_level
ul_id, uc_id (References User Category)
...
level_tasks
lt_id , ul_id (References User level) , lt_point, lt_max
user_tasks
ut_id, lt_id (References level task), uid (References user)
The below is the query i have tried so far :
SELECT uid, SUM(LT.lt_point/LT.lt_max) as TotalLevelPoints
FROM users AS U
INNER JOIN user_tasks AS UT ON UT.ut_user_id = U.id
INNER JOIN level_tasks AS LT ON LT.lt_id = UT.lt_id
INNER JOIN user_level AS UL ON UL.ul_id = LT.ul_id
INNER JOIN user_category AS UC ON UC.uc_id = UL.uc_id
WHERE UT.ut_status = 1 AND U.uid = 1 AND UL.ul_id = 1
GROUP BY U.uid
This gives all the sum without considering the max limit, how should i write so that sum is calculated on that column also.
Hope my question is clear enough.. Any help would be really appreciated.
I believe you will need to do this in 2 steps. First sum the points and compare to the maximums allowed for each task type. Once that is determined, sum those results for each user. e.g.
SELECT
u.uid
, SUM(user_task_points) AS user_task_points
FROM users AS u
INNER JOIN (
SELECT
ut.UT_user_id
, lt_id
, lt.LT_point
, lt.LT_max_times
, CASE WHEN SUM(lt.LT_point) > (lt.LT_point * lt.LT_max_times) THEN (lt.LT_point * lt.LT_max_times)
ELSE SUM(lt.LT_point)
END AS user_task_points
FROM user_tasks AS ut
INNER JOIN level_tasks AS lt ON ut.UT_rule_id = lt.LT_id
INNER JOIN user_level AS UL ON UL.ul_id = LT.ul_id
WHERE ut.UT_status = 1
AND ut.UT_user_id = 1
AND ul.ul_id = 1
GROUP BY
ut.UT_user_id
, lt_id
, lt.LT_point
, lt.LT_max_times
) AS p ON u.id = p.UT_user_id
GROUP BY
u.uid
;
There is some discrepancy between column names in schema and query you have provided. I have gone with schema.
Query is not tested. But this approach should work.
SELECT uid, SUM(LevelPoints) TotalLevelPoints
FROM ( SELECT U.uid, LT.lt_id, SUM((CASE WHEN COUNT(*) > lt_max THEN lt_max ELSE COUNT(*) END)*lt_point) LevelPoints
FROM users U
INNER JOIN user_tasks UT
ON U.uid = UT.uid
INNER JOIN level_tasks LT
ON UT.lt_id = LT.lt_id
GROUP BY U.uid, LT.lt_id
)
GROUP BY uid

MySQL query joining 3 tables and counting

I've been stuck on this problem for far too long.
I have to merge 3 tables and do some counting of distinct values.
I have 3 tables
1.User_me
profileId( String )
responded( int 1 or 0)
2.Profiles
profileId ( String )
idLocation ( int )
3.lookup_location
id ( int )
location (String )
I can join User_me and Profiles ON User_me.profileId = Profiles.profileId
I can join Profiles and lookup_location ON Profiles.idLocation = lookup_location.id
Under Profiles I need to count the number of distinct values for idLocation where User_me.profileId = Profiles.profileId
I also need to count the number of Profiles.idLocation that have User_me.responded = 1
I have this:
SELECT lookup.location, count(*) as total
FROM User_me user
JOIN Profiles
ON user.profileId= profiles.profileId
JOIN lookup_location lookup
ON profiles.idLocation = lookup.id
GROUP BY profiles.idLocation
but I still need to have the column giving me the count where User_me.responded = 1
Something like:
SELECT lookup.location, count(*) as total, count(*) responded
If I'm understanding your question correctly, you can you a case statement in the count aggregate:
SELECT lookup.location, count(*) as total,
count(case when user.responded = 1 then 1 end) as responded
FROM User_me user
JOIN Profiles
ON user.profileId= profiles.profileId
JOIN lookup_location lookup
ON profiles.idLocation = lookup.id
GROUP BY profiles.idLocation
Since you're using MySQL, you can also use something like sum(user.responded = 1).

how to select the last row insert by a specific iduser

Hello I want to get a specific userid who enter specific data. When X user enter data and save h will be the last row. But How I take the last row of exemple my user id = 16. Mnay user can insert data after him but I want only the last row of my user id 16.
SELECT *
from
projetstaches
inner join
timesheets
on (timesheets.timId = projetstaches.prtTimeSheetId)
inner join
users
on (users.usrId = timesheets.timUserId)
WHERE
users.usrId = 16 AND `prtTimeSheetId` = (
SELECT MAX( `prtTimeSheetId` )
FROM projetstaches )
When I do something like this it's return blank cause the last user who entered something is 7.
So how do I retrieve my last user = 16?
Here what look my table ( this is a old ver but good to know how it's look like the data now is more completed but the name of table its the same)
http://pastebin.com/6LBwGtc3
The subquery needs to use a join to select the highest prtTimeSheetId for this user, not the entire table.
SELECT *
from
projetstaches
inner join
timesheets
on (timesheets.timId = projetstaches.prtTimeSheetId)
inner join
users
on (users.usrId = timesheets.timUserId)
WHERE
users.usrId = 16
AND prtTimeSheetId = (
SELECT MAX(preTimeSheetId)
from
projetstaches
inner join
timesheets
on (timesheets.timId = projetstaches.prtTimeSheetId)
inner join
users
on (users.usrId = timesheets.timUserId)
WHERE users.usrId = 16)

Trying to building optimised Query for Group and Subgroup for a user

i am trying to write the Query for three things .My table structure is like that
You can see Schema at http://sqlfiddle.com/#!2/56c2d/1
I am trying to write the query in MYSQL
user:- table
user_id
user_fname
This is User tabke which will save User Information
group:- "group" and "subgroup" is maintain in same table using column "group_parent_group_id"
group_id
group_title
group_parent_group_id(INT)
This is group table which will save Group and Subgroups
user_group: table
user_group_id
user_group_user_id
user_group_group_id
This ill store both User and Group relation using their Id
I am trying to write the Query for three things. Fetching Users Groups, Subgroups
1) Query to fetch list of All Groups for User Register. Query is gelow and is giving error
Query:
select user.id, user.user_fname, group.group_id, group.group_title
from `user`
inner join user_group on user_group.user_group_user_id = user.user_id
inner join group on group.group_id = user_group.user_group_group_id
where user_group.user_group_user_id = 1 and user_group.group_parent_group_id = 0
2) I am Looking the query to fetch all subgroups(For Whom user is already Register) for Group Id 1,2 or 1
3) I am Looking the query to fetch all subgroups(For Whom user is Not Register yet) for Group Id 1,2 or 1. Ideal is for giving him randomly suggest a subgroup to add
Please Help. I am a newbie in DB :(
Your query is probably failing as you have a table called group, which is a reserved word. You can use back tics to delimit the name to get away with this (as follows) but it would be a better idea to change the table name.
SELECT user.id, user.user_fname, `group`.group_id, `group`.group_title
FROM `user`
INNER JOIN user_group ON user_group.user_group_user_id = user.user_id
INNER JOIN `group` ON `group`.group_id = user_group.user_group_group_id
WHERE user_group.user_group_user_id = 1
AND user_group.group_parent_group_id = 0
EDIT updated for queries I think the OP requires.
First query will get a list of all the groups (ones that have no parent group id) that a user (in this case id 28) is a member of
SELECT y2m_user.user_id, y2m_user.user_first_name, y2m_group.group_id, y2m_group.group_title
FROM y2m_user
INNER JOIN y2m_user_group ON y2m_user_group.user_group_user_id = y2m_user.user_id
INNER JOIN y2m_group ON y2m_group.group_id = y2m_user_group.user_group_group_id
WHERE y2m_user.user_id = 28
AND y2m_group.group_parent_group_id = 0
This query will get a list of all the sub groups (ones where the parent group id is greater than 0) that a user (in this case id 28) is a member of
SELECT y2m_user.user_id, y2m_user.user_first_name, y2m_group.group_id, y2m_group.group_title
FROM y2m_user
INNER JOIN y2m_user_group ON y2m_user_group.user_group_user_id = y2m_user.user_id
INNER JOIN y2m_group ON y2m_group.group_id = y2m_user_group.user_group_group_id
WHERE y2m_user.user_id = 28
AND y2m_group.group_parent_group_id > 0
This query will get a list of all the sub groups (ones where the parent group id is greater than 0) that a user (in this case id 28) is NOT a member of
SELECT y2m_user.user_id, y2m_user.user_first_name, y2m_group.group_id, y2m_group.group_title
FROM y2m_user
CROSS JOIN y2m_group
LEFT OUTER JOIN y2m_user_group ON y2m_user_group.user_group_user_id = y2m_user.user_id AND y2m_group.group_id = y2m_user_group.user_group_group_id
WHERE y2m_user.user_id = 28
AND y2m_group.group_parent_group_id > 0
AND y2m_user_group.user_group_id IS NULL
Please excuse any typos as not tested (with your test data there are no sub groups).