It's me again with my weird queries.
table users:
id | type | partner | company
------------------------------
1 | 2 | 0 | comp1
2 | 3 | 2 | comp2
3 | 3 | 2 | comp3
4 | 3 | 3 | comp4
table orders:
id | user | partner
--------------------
1 | 2 | 2
2 | 2 | 2
3 | 2 | 3
4 | 3 | 2
I know it's a little hart to keep track of all these numbers.
I'm logged in as type 2(users table) and want to get listed all information from the orders table from the users with type 3 and which are listed as my partners (partner 2) in addition I want the company name from the users table also in my results.
The query will be excecuted on the orders table.
result:
id | user | partner | company
------------------------------
1 | 2 | 2 | comp2
2 | 2 | 2 | comp2
4 | 3 | 2 | comp3
Thanks in advance and ask me if you don't understand the problem. I will try to explain better and any edits to make it more clear are also welcomed.
Perhaps this
select s.id,
case when src = 'u' then s.users
else s.partner
end as users,
case when src = 'p' then s.users
else s.partner
end as partner,
u.company
from
(
select 'u' as src,id,users,partner from o where users = 2 and (users = partner)
union
select 'p',id,partner,users from o where partner = 2 and (users <> partner)
) s
join u on u.id = s.partner
where type = 3;
Hopefully self explanatory, note I only need to know the user, the query figures out the partners.
result
+------+-------+---------+---------+
| id | users | partner | company |
+------+-------+---------+---------+
| 2 | 2 | 2 | comp2 |
| 1 | 2 | 2 | comp2 |
| 4 | 3 | 2 | comp3 |
+------+-------+---------+---------+
3 rows in set (0.00 sec)
Related
I'm kinda lost on what kind of SQL query I should do to achieve what I want.
Let's say I have three tables :
select * FROM trip;
| trip_id | title | description
----------------------------------
| 1 | title1 | desc1 |
| 2 | title2 | desc2 |
| 3 | title3 | desc3 |
| 4 | title4 | desc4 |
| 5 | title5 | desc5 |
| 6 | title6 | desc6 |
select * FROM weekly_report;
| report_id | trip_id| incident_id
----------------------------------
| 1 | 1 | (null) |
| 2 | 1 | (null) |
| 3 | 1 | 1 |
| 4 | 2 | 2 |
| 5 | 3 | 3 |
| 6 | 3 | (null) |
select * FROM incident;
| incident_id | error_code |
----------------------------------
| 1 | 22223 |
| 2 | 25456 |
| 3 | 25456 |
So for a little operationnal knowledge :
The trip table contains 1 record PER trip done by the customer.
The weekly_report contains A report per Week of the trip. (1 trip of 2 weeks will have 2 records, 1 trip or 5 weeks will have 5.. ).
The incident table contains 1 record per incident. (If an incident happened during a week : we create a record in the incident table, else we do nothing)
I'd like to find in a single query (or if it has to be, with subqueries) the number of trips where during at least a week there has been an incident declared for the error_code "25456".
Expected result from the sample data : 2 ( because for trip 2 and three there exist an incident with the error code 25456 ).
I can explain more if needed, is there anybody out there willing to help me ?
Thanks,
You need to take count of distinct trips for related incidents
select count(distinct w.trip_id)
from weekly_report w
inner join incident i
on w.incident_id = i.incident_id
where i.error_code = 25456;
Try this:
SELECT w.trip_id
FROM incident i
INNER JOIN weekly_report w ON i.incident_id=w.incident_id
WHERE error_code='25456'
and if you want the count,then
SELECT COUNT(w.trip_id)
FROM incident i
INNER JOIN weekly_report w ON i.incident_id=w.incident_id
WHERE error_code='25456'
I have following DB structure:
Table cars:
+----+-----------------------+
| id | few other columns.... |
+----+-----------------------+
| 1 | ... |
| 2 | ... |
| 3 | ... |
+----+-----------------------+
Table properties:
+----+-------+
| id | name |
+----+-------+
| 1 | title |
| 2 | type |
| 3 | brand |
| 4 | color |
+----+-------+
Table cars_properties:
+----+--------+-------------+------------+
| id | car_id | property_id | txt |
+----+--------+-------------+------------+
| 1 | 1 | 1 | Volvo V70 |
| 2 | 1 | 2 | personal |
| 3 | 1 | 3 | Volvo |
| 4 | 1 | 4 | white |
| 5 | 2 | 1 | Volvo VV |
| 6 | 2 | 2 | personal |
| 7 | 2 | 3 | Volvo |
| 8 | 2 | 4 | blue |
| 9 | 3 | 1 | Volvo XXL |
| 10 | 3 | 2 | truck |
| 11 | 3 | 3 | Volvo |
| 12 | 3 | 4 | white |
+----+--------+-------------+------------+
I would like to get all cars that have unique/duplicated values in one or many properties. Currently I'm using this SQL pattern to get duplicates for car type and brand:
SELECT cars.id FROM cars
LEFT JOIN cars_properties AS cp_0 ON cp_0.car_id = cars.id AND cp_0.property_id = 2 # => type
LEFT JOIN cars_properties AS cp_1 ON cp_1.car_id = cars.id AND cp_1.property_id = 3 # => brand
INNER JOIN (
SELECT cp_0.txt AS type_txt, cp_1.txt AS brand_txt FROM cars
LEFT JOIN cars_properties AS cp_0 ON cp_0.car_id = cars.id AND cp_0.property_id = 2
LEFT JOIN cars_properties AS cp_1 ON cp_1.car_id = cars.id AND cp_1.property_id = 3
GROUP BY cp_0.txt, cp_1.txt
HAVING COUNT(cars.id) > 1
) dupes ON cp_0.txt=dupes.type_txt AND cp_1.txt=dupes.brand_txt;
And expected result is:
+----+
| id |
+----+
| 1 |
| 2 |
+----+
Explanation: Both cars with id = 1 and 2 has type and brand that is present in more than one car (multiple times).
As for unique cars, I'm just altering: HAVING COUNT(cars.id) = 1 and I want to find all rows where the combination of properties is present only in one car (once).
It works fine, but it's extremely slow with more than 2 properties I want to check.
I cannot change the DB structure, and I'm not sure how to optimize the query, or if there are better ways of achieving this.
It feels like I would need to implement counter table, where each property id and value (txt) would also store corresponding number of occurrences in cars, and update this counter on every insert/update/delete... But I still hope there is some better SQL, that could help. Do you know some? Any advice greatly appreciated, thanks!
PS: I tried to create fiddle for it, but after I build schema I cannot run any SQL on it. To quickly setup DB with data, you can check SQL Fiddle
I'm stuck with a problem in MySql, please help me.
In this example I have two tables, one with the results of a bunch of competitors and one that defines which three competitors that makes a team. In reality I have a number of other tables as well, but they are not really needed to describe this problem.
Table with results for each competitor
| competitor_id | result1 | result2 | result3 | result4 |
| 1 | 1 | 1 | 1 | 1 |
| 2 | 1 | 2 | 2 | 1 |
| 3 | 2 | 3 | 2 | 1 |
| 4 | 1 | 5 | 3 | 2 |
| 5 | 4 | 3 | 2 | 3 |
| 6 | 3 | 2 | 1 | 2 |
| 7 | 2 | 1 | 4 | 2 |
| 8 | 2 | 1 | 2 | 1 |
| 9 | 1 | 2 | 3 | 2 |
Table showing teams
| team_id | competitor1 | competitor3 | competitor3 |
| 1 | 1 | 3 | 4 |
| 2 | 2 | 8 | 9 |
| 3 | 7 | 6 | 5 |
I would now like to create a query that gives me the total sum of each team. I need to have it i one query (maybe with subqueries) because I need to sort desc on the total result.
In other words, I need a result set giving me team.id sorted desc on the total result of each team.
Anyone?
EDIT: Here's an update showing the desired result
First, let´s sum the results of each competitor:
Competitor 1: 1+1+1+1=4
Competitor 2: 1+2+2+1=6
Competitor 3: 2+3+2+1=8
Competitor 4: 1+5+3+2=11
Competitor 5: 4+3+2+3=12
Competitor 6: 3+2+1+2=8
Competitor 7: 2+1+4+2=9
Competitor 8: 2+1+2+1=6
Competitor 9: 1+2+3+2=8
Then let's look at the team table.
Team 1 consists of competitors 1, 3 and 4.
Team 2 consists of competitors 2, 8 and 9.
Team 3 consists of competitors 7, 6 and 5.
Total sum of team with id = 1 is 4+8+11=23
Total sum of team with id = 2 is 6+6+8=20
Total sum of team with id = 3 is 9+8+12=29
Given all of this, I would like my result set to be
| id | team_sum |
| 3 | 29 |
| 1 | 23 |
| 2 | 20 |
Why not redesign your database like you have only two tables one for competitors and one for team like :
Competitors Table:
`competitor_id`, `team_id`, `result1`, `result2`, `result3`, `result4`
Team Table:
`team_id`, `team_name`
And your query would be very easy like:
SELECT A.team_id, B.team_name, SUM(result1+result2+result3+result4) as TotalResult
FROM competitors A
INNER JOIN team B
ON A.team_id=B.team_id
GROUP BY A.team_id, B.team_name
See my fiddle demo
Given a join table for m-2-m relationship between booth and user
+-----------+------------------+
| booth_id | user_id |
+-----------+------------------+
| 1 | 1 |
| 1 | 2 |
| 1 | 5 |
| 1 | 9 |
| 2 | 1 |
| 2 | 2 |
| 2 | 5 |
| 2 | 10 |
| 3 | 1 |
| 3 | 2 |
| 3 | 3 |
| 3 | 4 |
| 3 | 6 |
| 3 | 11 |
+-----------+------------------+
How can I get a distinct set of booth records that are common between a subset of user ids? For example, if I am given user_id values of 1,2,3, I expect the result set to include only booth with id 3 since it is the only common booth in the join table above between all user_id's provided.
I'm hoping I'm missing a keyword in MySQL to accompish this. The furthest I've come so far is using ... user_id = all (1,2,3) but this is always returning an empty result set (I believe I understand why it is though).
The SQL query for this will be:
select booth_id from table1 where [user_id]
in (1,2,3) group by booth_id having count(booth_id) =
(select count(distinct([user_id])) from table1 where [user_id] in (1,2,3))
If this could help you creating the MySQL query.
I've got two tables in my database. Table 1 is a list of "timelines" and their corresponding owners and title.
Table 2 is a list of users who have access to the timelines but are followers, not owners.
I'm trying to write a query that outputs the lineID's and corresponding titles that are linked to a userID in either of the two tables.
A query for userID 1 would ideally output:
1 a
2 b
3 c
6 f
Hopefully this isn't too confusing but the purpose is to fill a dynamically generated select box with the LineID and Title for a given UserID...
Table 1 ("owners")
--------------------------
| LineID | UserID | Title |
| 1 | 1 | a |
| 2 | 1 | b |
| 3 | 1 | c |
| 4 | 2 | d |
| 5 | 2 | e |
| 6 | 1 | f |
--------------------------
Table 2 ("followers")
----------------------------
| RowID | LineID | UserID |
| 1 | 1 | 1 |
| 2 | 1 | 2 |
| 3 | 3 | 1 |
| 4 | 3 | 2 |
| 5 | 2 | 2 |
| 6 | 6 | 1 |
----------------------------
I tried using:
SELECT title
FROM `lines`
LEFT JOIN follow
ON follow.user_id = lines.user_id
WHERE follow.user_id = 1
That ended up producing duplicate rows.
The output I need would ideally be an array consisting of all the lineID's and Titles associated with that userID.
select LineId, Title
from owners
where LineId in (select LineId from followers group by LineId )
order by owners.LineId