My query looks like
Select m.cw_sport_match_id as MatchId,
m.season_id as SeasonId,
s.title as SeasonName,
c.title as ContestName
from dbo.cw_sport_match m
inner join dbo.cw_sport_season s
ON m.season_id = s.cw_sport_season_id
inner join dbo.cw_sport_contest c
ON m.contest_id = c.cw_sport_contest_id
Where s.date_start <= GETDATE() AND s.date_end >= GETDATE()
order by s.date_start
No i need the name parent of the sport_contest (if there is one, it can be null). So basically a self join but no on the same table as the query is for. All the examples that i find do the self join are not done on another table.
can any sql pro help me?
So how can i join the cw_sport_season itself with the season_parent_id and get the title of it?
If I'm understanding your question correctly, you want to outer join the cw_sport_season table to itself using the season_parent_id field. Maybe something on these lines:
Select m.cw_sport_match_id as MatchId,
m.season_id as SeasonId,
s.title as SeasonName,
parent.title as ParentSeasonName,
c.title as ContestName
from dbo.cw_sport_match m
inner join dbo.cw_sport_season s
ON m.season_id = s.cw_sport_season_id
inner join dbo.cw_sport_contest c
ON m.contest_id = c.cw_sport_contest_id
left join dbo.cw_sport_season parent
ON s.season_parent_id = parent.cw_sport_season_id
Where s.date_start <= GETDATE() AND s.date_end >= GETDATE()
order by s.date_start
Related
I am working with sql server through SSMS right now. How can i choose all people with multiple(>2)vacancies?
I am trying something like that, but i dont understand how to make part with "more than 2 vacancies"?
SELECT dbo.applicants.FirstName, dbo.vacancy.Name
FROM dbo.applicants INNER JOIN
dbo.VacancyApplicant ON dbo.applicants.id = dbo.VacancyApplicant.ApplicantId INNER JOIN
dbo.vacancy ON dbo.VacancyApplicant.VacancyId = dbo.vacancy.id WHERE dbo.vacancy.Name='third vacancy'
SELECT dbo.applicants.FirstName, dbo.vacancy.Name
FROM dbo.applicants A INNER JOIN
dbo.VacancyApplicant V ON A.id = V.ApplicantId
WHERE EXIST(
SELECT 1
FROM dbo.applicants INNER JOIN
dbo.VacancyApplicant ON dbo.applicants.id =
dbo.VacancyApplicant.ApplicantId INNER JOIN
dbo.vacancy ON dbo.VacancyApplicant.VacancyId = dbo.vacancy.id
WHERE A.id=dbo.applicants.id
GROUP BY dbo.applicants.id,dbo.vacancy.id
HAVING COUNT(1)>2
)
Group By and Having are you basic answer. Below is a simple solution, might not be ideal, but can give you the idea.
I am finding target "applicants" ids in subquery, that uses GROUP BY and HAVING then outer query joins to that to output FirstName and LastName of applicant
SELECT dbo.applicants.FirstName, dbo.applicants.LastName FROM
dbo.applicants a INNER JOIN
(
SELECT dbo.applicants.id
FROM dbo.applicants INNER JOIN
dbo.VacancyApplicant ON dbo.applicants.id = dbo.VacancyApplicant.ApplicantId INNER JOIN
dbo.vacancy ON dbo.VacancyApplicant.VacancyId = dbo.vacancy.id AND dbo.vacancy.Name='third vacancy'
GROUP BY dbo.applications.id
HAVING COUNT(dbo.vacancy.id) > 2
) targetIds ON a.id = targetIds.id
"more than 2 vacancies"?
Your question only mentions vacancies but your query is filtering for a particular name. I assume you really want more than two of that name.
If I understand correctly, you want aggregation:
SELECT a.FirstName, a.Name
FROM dbo.applicants a INNER JOIN
dbo.VacancyApplicant va
ON a.id = va.ApplicantId INNER JOIN
dbo.vacancy v
ON va.VacancyId = v.id
WHERE v.Name = 'third vacancy'
GROUP BY a.FirstName, v.Name
HAVING COUNT(*) > 2;
Note the use of table aliases. They make the query easier to write and to read.
WITH TempCTE AS (
SELECT DISTINCT ap.FirstName
,vc.Name
,COUNT (va.VacancyId) OVER (PARTITION BY ap.id) AS NoOfVacancies
FROM dbo.applicants ap
JOIN dbo.VacancyApplicant va
ON ap.id = va.ApplicantId
JOIN dbo.vacancy vc
ON va.VacancyId = vc.id
)
SELECT FirstName,[Name], NoOfVacancies FROM TempCTE
WHERE NoOfVacancies > 2
I am trying to create one single query that will give me a distinct count for both the ActivityID and the CommentID. My query in MS Access looks like this:
SELECT
tbl_Category.Category, Count(tbl_Activity.ActivityID) AS CountOfActivityID,
Count(tbl_Comments.CommentID) AS CountOfCommentID
FROM tbl_Category LEFT JOIN
(tbl_Activity LEFT JOIN tbl_Comments ON
tbl_Activity.ActivityID = tbl_Comments.ActivityID) ON
tbl_Category.CategoryID = tbl_Activity.CategoryID
WHERE
(((tbl_Activity.UnitID)=5) AND ((tbl_Comments.PeriodID)=1))
GROUP BY
tbl_Category.Category;
I know the answer must somehow include SELECT DISTINCT but am not able to get it to work. Do I need to create multiple subqueries?
This is really painful in MS Access. I think the following does what you want to do:
SELECT ac.Category, ac.num_activities, aco.num_comments
FROM (SELECT ca.category, COUNT(*) as num_activities
FROM (SELECT DISTINCT c.Category, a.ActivityID
FROM (tbl_Category as c INNER JOIN
tbl_Activity as a
ON c.CategoryID = a.CategoryID
) INNER JOIN
tbl_Comments as co
ON a.ActivityID = co.ActivityID
WHERE a.UnitID = 5 AND co.PeriodID = 1
) as caa
GROUP BY ca.category
) as ca LEFT JOIN
(SELECT c.Category, COUNT(*) as num_comments
FROM (SELECT DISTINCT c.Category, co.CommentId
FROM (tbl_Category as c INNER JOIN
tbl_Activity as a
ON c.CategoryID = a.CategoryID
) INNER JOIN
tbl_Comments as co
ON a.ActivityID = co.ActivityID
WHERE a.UnitID = 5 AND co.PeriodID = 1
) as aco
GROUP BY c.Category
) as aco
ON aco.CommentId = ac.CommentId
Note that your LEFT JOINs are superfluous because the WHERE clause turns them into INNER JOINs. This adjusts the logic for that purpose. The filtering is also very tricky, because it uses both tables, requiring that both subqueries have both JOINs.
You can use DISTINCT:
SELECT
tbl_Category.Category, Count(DISTINCT tbl_Activity.ActivityID) AS CountOfActivityID,
Count(DISTINCT tbl_Comments.CommentID) AS CountOfCommentID
FROM tbl_Category LEFT JOIN
(tbl_Activity LEFT JOIN tbl_Comments ON
tbl_Activity.ActivityID = tbl_Comments.ActivityID) ON
tbl_Category.CategoryID = tbl_Activity.CategoryID
WHERE
(((tbl_Activity.UnitID)=5) AND ((tbl_Comments.PeriodID)=1))
GROUP BY
tbl_Category.Category;
This SQL query needs to be done in ACCESS.
I am trying to do a subquery on the total sales, but I want to link the sale to the province AND to product. The below query will work with one or the other: (po.product_name = allp.all_products) AND (p.province = allp.all_province); -- but it will no take both.
I will be including every month into this query, once I can figure out the subquery on with two criteria.
Select
p.province as [Province],
po.product_name as [Product],
all_price
FROM
(purchase_order po
INNER JOIN person p
on p.person_id = po.person_id)
left join
(
select
po1.product_name AS [all_products],
sum(pp1.price) AS [all_price],
p1.province AS [all_province]
from (purchase_order po1
INNER JOIN product pp1
on po1.product_name = pp1.product_name)
INNER JOIN person p1
on po1.person_id = p1.person_id
group by po1.product_name, pp1.price, p1.province
)
as allp
on (po.product_name = allp.all_products) AND (p.province = allp.all_province);
Make the first select sql into a table by giving it an alias and join table 1 to table 2. I don't have your table structure or data to test it but I think this will lead you down the right path:
select table1.*, table2.*
from
(Select
p.province as [Province],
po.product_name as [Product]
--removed this ,all_price
FROM
(purchase_order po
INNER JOIN person p
on p.person_id = po.person_id) table1
left join
(
select
po1.product_name AS [all_products],
sum(pp1.price) AS [all_price],
p1.province AS [all_province]
from (purchase_order po1
INNER JOIN product pp1
on po1.product_name = pp1.product_name)
INNER JOIN person p1
on po1.person_id = p1.person_id
group by po1.product_name, pp1.price, p1.province --check your group by, I dont think you want pp1.price here if you want to aggregate
) as table2 --changed from allp
on (table1.product = table2.all_products) AND (table1.province = table2.all_province);
I have this query:
SELECT c.name, COUNT(t.id)
FROM Cinema c
JOIN CinemaMovie cm ON cm.cinema_id = c.id
JOIN Ticket t ON cm.id = cinema_movie_id
WHERE cm.id IN (
SELECT cm1.id
FROM CinemaMovie cm1
JOIN Movie m1 ON m1.id = cm1.movie_id
JOIN Ticket t1 ON t1.cinema_movie_id = cm1.id
WHERE m1.name = 'Hellboy'
AND t1.time >= timestamp '2019-04-18 00:00:00'
AND t1.time <= timestamp '2019-04-18 23:59:59' )
GROUP BY c.id;
and the problem is that this query runs really slow (more than 1 minute) when the table has like 20 million rows. From what I understand, the problem seems to be the inner query, as it takes a long time. Also, I have all indexes on foreign keys. What am I missing ?
Also note that when I select only by name (I omit the date) everything takes like 10 seconds.
EDIT
What I am trying to do, is count number of tickets for each cinema name, based on movie name and the timestamp on ticket.
I don't understand why you are using a subquery. Does this do what you want?
SELECT c.name, COUNT(t.id)
FROM Cinema c JOIN
CinemaMovie cm
ON cm.cinema_id = c.id JOIN
Ticket t
ON cm.id = cinema_movie_id JOIN
Movie m
ON m.id = cm.movie_id
WHERE m.name = 'Hellboy' AND
t.time >= '2019-04-18'::timestamp and
t.time < '2019-04-19'::timestamp
GROUP BY c.id, c.name;
the next sql statement work fine. it shows both patient_id and serv_name, but i try to show patient_name instead of patient_id
SELECT C1.patient_id, S.serv_name
FROM
Checkup_Details C
INNER JOIN Services S ON (C.serv_id=S.serv_id),
Checkup C1
WHERE
C1.today = DATE() AND C1.check_id=C.check_id
ORDER BY C.check_id
so how am i suppose to do that by adding this sql statement
INNER JOIN Patient P ON (C1.patient_id=P.patient_id)
but i don't know how exactely.
Assuming the field patient_name is in Checkup_Details, you have to put
SELECT C1.patient_name ...
instead from
SELECT C1.patient_id ...
Simply add the INNER JOIN clause to get the columns of the table Patient and change C1.patient_id by P.patient_name.
SELECT P.patient_name, S.serv_name
FROM
Checkup_Details C
INNER JOIN Services S ON (C.serv_id=S.serv_id),
INNER JOIN Patient P ON (C1.patient_id=P.patient_id)
Checkup C1
WHERE
C1.today = DATE() AND C1.check_id=C.check_id
ORDER BY C.check_id
You should not mix implicit and explicit join syntax. A simple rule: never use commas in the from clause:
SELECT C1.patient_id, S.serv_name
FROM Checkup_Details C INNER JOIN
Services S
ON C.serv_id = S.serv_id INNER JOIN
Checkup C1
ON C1.check_id = C.check_id INNER JOIN
Patient P
ON C1.patient_id = P.patient_id
WHERE C1.today = DATE()
ORDER BY C.check_id;