I have a query as follows:
SELECT
staff_names.staff_ID AS sid
staff_names.name AS name,
staff_names.rec_type AS rec_type,
prod_staff.specialized AS specialized,
compspec.name AS compspec_name
FROM staff_names JOIN prod_staff USING (staff_ID)
LEFT JOIN (prod_staff_compspec JOIN company_list USING (comp_ID)) compspec
USING (prod_ID, staff_ID, role_ID)
WHERE prod_staff.role_ID = 2
AND prod_staff.prod_ID = 27
AND prod_staff.asst = 'n'
AND episode IS NOT NULL
ORDER BY name
Running this as-is says there's an error near the 'compspec' alias. Removing that and changing 'compspec' to 'company_list' in the SELECT clause returns no rows, even though it should return 1 with the given values. The left join seems to be the problem, but I don't how it should be formatted.
The prod_staff table has prod_ID, staff_ID and role_ID fields. prod_staff_compspec has these and a comp_ID field. prod_staff may or may not have a matching prod_staff_compspec row, but prod_staff_compspec always has a matching company_list row.
What I want to do is retrieve a list of all staff names associated with a given role_ID and prod_ID in the prod_staff table, as well as a company name from the company_list table, if a link to such exists in the prod_staff_compspec table (only a small minority have one).
Switched to ON to define the table relations. LEFT JOIN (prod_staff_compspec JOIN company_list USING (comp_ID)) compspec is switched to 2 left join.
select a.staff_id sid, a.name, a.rec_type, b.specialized, d.name compspec_name
from staff_names a
join prod_staff b on a.staff_id = b.staff_id
left join prod_staff_compspec c on b.prod_id = c.prod_id and b.staff_id = c.staff_id and b.role_id = c.role_id
left join company_list d on c.comp_id = d.comp_id
where b.role_id = 2 and b.prod_id = 27 and b.asst = 'n' and episode is not null
order by a.name;
Related
I have four tables, three of which are pretty static: haul_types, dumpster_type_team (the dumpster_type_team has the many-to-many relationship between dumpster_types and teams), and users. The fourth table, hauls, has transactional data.
haul_types:
id
name
dumpster_type_team:
id
dumpster_type_id
team_id
users:
id
first_name
last_name
is_driver
team_id
hauls:
haul_type_id
haul_status_id
set_dumpster_type_id
completed_driver_id
team_id
I would like a query that has a combination of dumpster_types, haul_types, and drivers (users) and a count of the hauls they were involved in. In some cases, there should be a count of zero because some drivers haven't completed hauls for every haul_type / dumpster type combination.
Here's the query I have so far that seems to be behaving as if it is an inner join because the records are getting filtered to only show where there are matches:
SELECT
c.haul_type_id,
c.dumpster_type_id,
c.driver_id,
count(h.id) AS haul_count
FROM
hauls h
RIGHT JOIN ( SELECT DISTINCT
ht.id AS haul_type_id,
dtt.dumpster_type_id AS dumpster_type_id,
dtt.team_id AS team_id,
u.id AS driver_id
FROM
haul_types ht
CROSS JOIN dumpster_type_team dtt
CROSS JOIN users u
WHERE
u.team_id = dtt.team_id
AND u.is_driver = TRUE) c ON c.haul_type_id = h.haul_type_id
AND c.dumpster_type_id = h.set_dumpster_type_id
AND c.driver_id = h.completed_driver_id
AND c.team_id = h.team_id
WHERE
h.team_id = 9
AND h.haul_status_id = 3
AND h.completed_driver_id IS NOT NULL
GROUP BY
c.haul_type_id, c.dumpster_type_id, c.driver_id
When I run the subquery in isolation:
SELECT DISTINCT
ht.id AS haul_type_id,
dtt.dumpster_type_id AS dumpster_type_id,
dtt.team_id AS team_id,
u.id AS driver_id
FROM
haul_types ht
CROSS JOIN dumpster_type_team dtt
CROSS JOIN users u
WHERE
u.team_id = dtt.team_id
AND u.is_driver = TRUE
I get the results I want: a row for each permutation of haul_type, dumpster_type, driver_id, and team_id. However, when I run the entire query, I get filtered results despite the right join.
What I would like to have is the following:
If I have 4 haul_types: delivery, swap, live, pickup
and 2 dumpster_types: 10YD, 15YD
and 2 drivers: 1, 2
I would like a haul count for the combination of haul_type, dumpster_type, and driver. If there are no hauls matching the row, show 0:
Any help is appreciated. Thank you
The description of the question and the query seem to have little to do with each other. I don't know what a "pivot table" is supposed to be.
I would like a query that has a combination of dumpster_types, haul_types, and drivers (users) and a count of the hauls they were involved in.
This sounds like a cross join to generate the rows and then a left join/group by to calculate the results:
select d.dumpster_id, ht.haul_type_id, d.driver_id, count(h.driver_id)
from dumpster_types d cross join
haul_types ht cross join
drivers d left join
hauls h
on h.dumpster_id = d.dumpster_id and
h.haul_type_id = ht.haul_type_id and
h.driver_id = d.driver_id
group by d.dumpster_id, ht.haul_type_id, d.driver_id;
Running the query #GordonLinoff provided, exposed the issue I was facing - when applying a where clause on the top level query, the results were getting filtered to only matches. I moved the where clause to individual subqueries and now I am getting all expected results.
Not sure if this is the most efficient way to write it but it yields the correct results:
SELECT
d.dumpster_type_id,
ht.id AS haul_type_id,
u.id AS driver_id,
count(h.id) AS haul_count
FROM (
SELECT
dumpster_type_id,
team_id
FROM
dumpster_type_team
WHERE
team_id = 9) d
CROSS JOIN haul_types ht
CROSS JOIN (
SELECT
users.id
FROM
users
WHERE
users.is_driver = TRUE
AND users.team_id = 9) u
LEFT JOIN (
SELECT
id, set_dumpster_type_id, haul_type_id, completed_driver_id, team_id
FROM
hauls
WHERE
haul_status_id = 3
AND team_id = 9) h ON h.set_dumpster_type_id = d.dumpster_type_id
AND h.haul_type_id = ht.id
AND h.completed_driver_id = u.id
AND h.team_id = d.team_id
GROUP BY
d.dumpster_type_id,
ht.id,
u.id
Please find below a link to the table-structure I have set up and to the query I am running.
Link to tables and query.
The present result is that only the firstnames, lastnames and "education_finished" are showing. But all the option_id's and their related lang_values still show "NULL".
The desired result:
Any suggestions how to solve?
Below is the query that you are using:
SELECT d.pf_firstname, d.pf_lastname, f.field_id, fl.option_id,
d.pf_education_finished, fl.lang_value
FROM phpbb_profile_fields_data d
LEFT JOIN phpbb_profile_fields f
ON d.pf_education_finished = f.field_name
LEFT JOIN phpbb_profile_fields_lang fl
ON f.field_id = fl.field_id
ORDER BY d.pf_lastname ASC
The reason why you are getting null value is because of this condition:
LEFT JOIN phpbb_profile_fields f
ON d.pf_education_finished = f.field_name
You are trying to join on pf_education_finished (int) field of one table and field_name (int) field of another table. Also, there are no matching values (e.g. pf_education_finished contains numbers whereas field_nameis 'education finished').
If you want the query to return something then you need to join on field_id and phpbb_profile_fields needs to have some records with matching field id, e.g.:
SELECT d.pf_firstname, d.pf_lastname, f.field_id, fl.option_id,
d.pf_education_finished, fl.lang_value
FROM phpbb_profile_fields_data d
LEFT JOIN phpbb_profile_fields f
ON d.pf_education_finished = f.field_id
LEFT JOIN phpbb_profile_fields_lang fl
ON f.field_id = fl.field_id
ORDER BY d.pf_lastname ASC
Here's the updated SQL Fiddle.
SELECT d.pf_firstname, d.pf_lastname, f.field_id, fl.option_id,
d.pf_education_finished, fl.lang_value
FROM phpbb_profile_fields_lang fl
inner JOIN phpbb_profile_fields f
ON f.field_id = fl.field_id
inner JOIN phpbb_profile_fields_data d
ON f.field_id = fl.field_id
ORDER BY d.pf_lastname ASC
This is the optional query if you want to display data from 3-4 tables but in this query names are repeats as per the count of field_id present in phpbb_profile_fields_lang.
The exact solution you are looking is, when you have the same primary key in all the tables from which you are retrieving the data.
Thank you.
I have a problem with joining some tables, heres my structure:
tbl_imdb:
fldID fldTitle fldImdbID
1 Moviename 0000001
tbl_genres:
fldID fldGenre
1 Action
2 Drama
tbl_genres_rel:
fldID fldMovieID fldGenreID
1 1 1
2 1 2
What I’m trying to do is a query that will find all movies that is both an action movie and drama, is this possible to do without a subquery, if so, how?
What I'm trying right now is:
SELECT tbl_imdb.*
FROM tbl_imdb
LEFT JOIN tbl_imdb_genres_rel ON ( tbl_imdb.fldID = tbl_imdb_genres_rel.fldMovieID )
LEFT JOIN tbl_imdb_genres ON ( tbl_imdb_genres_rel.fldGenreID = tbl_imdb_genres.fldID )
WHERE tbl_imdb_genres.fldGenre = 'Drama'
AND tbl_imdb_genres.fldGenre = 'Action';
But this dosnt work, however it does work if I only keep one of the two WHERE's, but thats not what I want.
Two ways to do it:
1
SELECT tbl_imdb.*
FROM tbl_imdb
INNER JOIN tbl_genres_rel rel_action
ON tbl_imdb.fldID = rel_action.fldMovieID
INNER JOIN tbl_genres genre_action
ON rel_action.fldGenreId = genre_action.fldID
AND 'Action' = genre_action.fldGenre
INNER JOIN tbl_genres_rel rel_drama
ON tbl_imdb.fldID = rel_drama.fldMovieID
INNER JOIN tbl_genres genre_drama
ON rel_drama.fldGenreId = genre_drama.fldID
AND 'Drama' = genre_drama.fldGenre
This method is on the same path as your original solution. 2 differences:
The join should be inner, not left because you're trying to get movies that certainly have the corresponding genre entry
Since you want to find 2 different generes, you'll have to do the join with tbl_genres_rel and tbl_genres twice, once for each particular genre you're interested in.
2
SELECT tbl_imdb.*
FROM tbl_imdb
INNER JOIN tbl_genres_rel
ON tbl_imdb.fldID = tbl_genres_rel.fldMovieID
INNER JOIN tbl_genres
ON tbl_genres_rel.fldGenreId = tbl_genres.fldID
AND tbl_genres.fldGenre IN ('Action', 'Drama')
GROUP BY tbl_imdb.fldID
HAVING COUNT(*) = 2
Again, the basic join plan is the same. Difference here is that we join to the tbl_genres_rel and tbl_genres path just once. This on itself fetches all genres for one film, and then filters for the one's you're interested in. The ones that qualify will now have 2 rows for each distinct value of tbl_imdb.fldId. The GROUP BY aggregates on that, flattening that into one row. By asserting in the HAVING clause that we have exactly 2 rows, we ensure that we keep only those rows that have both the genres.
(Note that this assumes that there is a unique constraint on tbl_genres_rel over {fldMovieID, fldGenreID}. If such a constraint is not present, you should consider adding it.)
LEFT JOIN is not applicable in your case because records should exist on both tables. And you need to count the instances of the movie
SELECT *
FROM tbl_imdb a
INNER JOIN tbl_genres_rel b
on a.fldID = fldMovieID
INNER JOIN tbl_genres c
on c.fldGenreID = b.fldID
WHERE c.fldGenre IN ('Drama', 'Action')
GROUP BY a.Moviename
HAVING COUNT(*) > 1
I have 3 tables
person (id, name)
area (id, number)
history (id, person_id, area_id, type, datetime)
In this tables I store the info which person had which area at a specific time. It is like a salesman travels in an area for a while and then he gets another area. He can also have multiple areas at a time.
history type = 'I' for CheckIn or 'O' for Checkout.
Example:
id person_id area_id type datetime
1 2 5 'O' '2011-12-01'
2 2 5 'I' '2011-12-31'
A person started traveling in area 5 at 2011-12-01 and gave it back on 2011-12-31.
Now I want to have a list of all the areas all persons have right now.
person1.name, area1.number, area2.number, area6.name
person2.name, area5.number, area9.number
....
The output could be like this too (it doesn't matter):
person1.name, area1.number
person1.name, area2.number
person1.name, area6.number
person2.name, area5.number
....
How can I do that?
This question is, indeed, quite tricky. You need a list of the entries in history where, for a given user and area, there is an 'O' record with no subsequent 'I' record. Working with just the history table, that translates to:
SELECT ho.person_id, ho.area_id, ho.type, MAX(ho.datetime)
FROM History AS ho
WHERE ho.type = 'O'
AND NOT EXISTS(SELECT *
FROM History AS hi
WHERE hi.person_id = ho.person_id
AND hi.area_id = ho.area_id
AND hi.type = 'I'
AND hi.datetime > ho.datetime
)
GROUP BY ho.person_id, ho.area_id, ho.type;
Then, since you're really only after the person's name and the area's number (though why the area number can't be the same as its ID I am not sure), you need to adapt slightly, joining with the extra two tables:
SELECT p.name, a.number
FROM History AS ho
JOIN Person AS p ON ho.person_id = p.id
JOIN Area AS a ON ho.area_id = a.id
WHERE ho.type = 'O'
AND NOT EXISTS(SELECT *
FROM History AS hi
WHERE hi.person_id = ho.person_id
AND hi.area_id = ho.area_id
AND hi.type = 'I'
AND hi.datetime > ho.datetime
);
The NOT EXISTS clause is a correlated sub-query; that tends to be inefficient. You might be able to recast it as a LEFT OUTER JOIN with appropriate join and filter conditions:
SELECT p.name, a.number
FROM History AS ho
JOIN Person AS p ON ho.person_id = p.id
JOIN Area AS a ON ho.area_id = a.id
LEFT OUTER JOIN History AS hi
ON hi.person_id = ho.person_id
AND hi.area_id = ho.area_id
AND hi.type = 'I'
AND hi.datetime > ho.datetime
WHERE ho.type = 'O'
AND hi.person_id IS NULL;
All SQL unverified.
You're looking for results where each row may have a different number of columns? I think you may want to look into GROUP_CONCAT()
SELECT p.`id`, GROUP_CONCAT(a.`number`, ',') AS `areas` FROM `person` a LEFT JOIN `history` h ON h.`person_id` = p.`id` LEFT JOIN `area` a ON a.`id` = h.`area_id`
I haven't tested this query, but I have used group concat in similar ways before. Naturally, you will want to tailor this to fit your needs. Of course, group concat will return a string so it will require post processing to use the data.
EDIT I thikn your question has been edited since I began responding. My query does not really fit your request anymore...
Try this:
select *
from person p
inner join history h on h.person_id = p.id
left outer join history h2 on h2.person_id = p.id and h2.area_id = h.area_id and h2.type = 'O'
inner join areas on a.id = h.area_id
where h2.person_id is null and h.type = 'I'
I have a mysql db query that I'd like to take and condense into a single row. The output is currently two rows and will only ever be two rows. The reason I am getting two rows in the first place is because there will always be a primary and a secondary phone number associated with my result.
Since all of the data is exactly the same for both rows with the exception of the phone type (ptype) and second phone number, I'd like to just take those two columns and append them to the forst row.
I know this can be done but I can't remember how to do it.
Here is the code I am using:
SELECT
c.name,
c.address1,
p.ptype,
p.phone
FROM
customer AS c
Inner Join customeremp AS e ON c.customer_id = e.customer_id
Inner Join customerphone AS p ON e.customer_seq = p.customer_seq
WHERE
c.customer_id = '1'
You need to create 2 joins on the phone table
SELECTc.name,
c.address1,
p.ptype,
p.phone,
p2.ptype,
p2.phone,
FROMcustomer AS cInner
Join customeremp AS e ON c.customer_id = e.customer_idInner
Join customerphone AS p ON e.customer_seq = p.customer_seq and p.pType = 1 (or whatever private means)
Join customerphone AS p2 ON e.customer_seq = p2.customer_seq and p2.pType = 2 (or whatever the other type is)
WHEREc.customer_id = '1'
Edit: this query will only return customer which have BOTH phone types set. If they are optional, then you should consider changing the join into an outer join
select c.name,c.address1,primary.phone,secondary.phone
from customer c
join customeremp e
on c.customer_id = e.customer_id
join customerphone primary
on primary.ptype = 'primary'
and e.customer_seq = primary.customer_seq
join customerphone secondary
on secondary.ptype = 'secondary'
and e.customer_seq = secondary.customer_seq
where c.customer_id = '1'
Try this:
SELECT
c.name,
c.address1,
IF(p.ptype = 'primary', p.phone, null)),
IF(p.ptype = 'secondary', p.phone, null))
FROM customer JOIN (blah blah)
WHERE customer_id = 1
GROUP BY c.name, c.address1
If it doesn't work, you might need to put an aggregate function on the last two fields, eg: MAX(IF(p.ptype ...