I'm trying to join these two queries. Can anyone help?
Query 1 -
SELECT provas.id, disciplinas.disciplina, disciplinas.grupo,salas.sala
FROM provas, disciplinas, horarios, salas
WHERE provas.id = provas.id AND provas.id_disciplina = disciplinas.id AND provas.id_horario = horarios.id AND provas.id_sala = salas.id AND provas.id_horario JOIN horarios ON ;
Query 2 -
SELECT dias.dia, meses.nome, horas.hora, minutos.minuto
FROM horarios, meses, dias, horas, minutos
WHERE horarios.id = horarios.id AND horarios.id_dia = dias.id AND horarios.id_hora = horas.id AND horarios.id_mes = meses.id AND horarios.id_minuto = minutos.id;
Main table
Second Main table
I want to associate the "provas" table with the "horario" but the horario table has more foreign keys
provas = exams
horarios = scheudule
I want to join the shedule on the exams table, but the sheudule have more foreign keys for tables "days", "months", "hours" and "minutes"
All involved tables
You can try the following query. I didn't run this to make sure no syntax errors. But you can see the concept. You can join with a result set of a second query as shown below. I suggest you to consider the joins in your original query again. You may change the joins in my answer as it fits for your purpose.
SELECT ps.id, das.disciplina, das.grupo,s.sala
FROM provas ps
inner join disciplinas das on ps.id_disciplina = das.id
inner join horarios hs on ps.id_horario = hs.id
inner join salas s on ps.id_sala = s.id
inner join (
SELECT d.dia, ms.nome, h.hora, m.minuto, hs.id hsid
FROM horarios hs
inner join meses ms on hs.id_mes = ms.id
inner join dias d on hs.id_dia = d.id
inner join horas h on hs.id_hora = h.id
inner join minutos m on hs.id_minuto = m.id) zz on ps.id_horario = zz.hsid
My solution (I prefer this way):
SELECT provas.id, disciplinas.disciplina, disciplinas.grupo,salas.sala ,dias.dia, meses.nome, horas.hora, minutos.minuto
FROM provas, disciplinas, horarios, salas, meses, dias, horas, minutos
WHERE provas.id = provas.id AND provas.id_disciplina = disciplinas.id AND provas.id_horario = horarios.id AND provas.id_sala = salas.id AND provas.id_horario AND horarios.id_dia = dias.id AND horarios.id_hora = horas.id AND horarios.id_mes = meses.id AND horarios.id_minuto = minutos.id;
Related
looking for a bit of help here if possible?
I have the following query:-
On or database we have a table called Linkfile, in this table are "Types" all beginning with "YG". I need to return those rows that do not have the type of "YG8" but just cannot seem to do it. I know ill need to use a sub query but am stuck!
This is my code and the fields I need to return. I just need to only show those that do not have the lk.type of "YG8"
select distinct l.description, p.displayname AS Temp, p.compliance_status As 'Compliant', lk.displayname, lk.type
from event e
inner join organisation o on e.organisation_ref = o.organisation_ref
inner join opportunity opp on e.opportunity_ref = opp.opportunity_ref
inner join event_role ev on ev.event_ref = e.event_ref
inner join address a on a.address_ref = opp.address_ref
inner join person p on ev.person_ref = p.person_ref
inner join lookup l on p.responsible_team = l.code
inner join person_type pt on p.person_ref = pt.person_ref
inner join linkfile lk on lk.parent_object_ref = pt.person_ref
where o.displayname LIKE '%G4S%' and p.compliance_category = '$016'
and lk.type like 'YG%' and l.code_type = '2'
and a.displayname LIKE '%MOJ%'
and pt.status = 'A'
order by l.description, p.displayname, lk.type
Use below query :
select distinct l.description, p.displayname AS Temp, p.compliance_status As 'Compliant', lk.displayname, lk.type,lk.parent_object_ref
from event e
inner join organisation o on e.organisation_ref = o.organisation_ref
inner join opportunity opp on e.opportunity_ref = opp.opportunity_ref
inner join event_role ev on ev.event_ref = e.event_ref
inner join address a on a.address_ref = opp.address_ref
inner join person p on ev.person_ref = p.person_ref
inner join lookup l on p.responsible_team = l.code
inner join person_type pt on p.person_ref = pt.person_ref
left join (select displayname, type,parent_object_ref from linkfile where lk.type like 'YG8%' )lk on lk.parent_object_ref = pt.person_ref
where o.displayname LIKE '%G4S%' and p.compliance_category = '$016' and lk.parent_object_ref is null
and l.code_type = '2'
and a.displayname LIKE '%MOJ%'
and pt.status = 'A'
order by l.description, p.displayname, lk.type;
I've used left join on linkfile with type like 'YG8%' and fetching the only records which are not matched
I think you can just replace the
lk.type like 'YG%'
with the following:
(lk.type >= 'YG' and lk.type <'YG8') or (lk.type > 'YG8' and lk.type <='YGZ')
this should accomplish what you are trying to do and also avoid using "like" which is less efficient (assuming you have an index on lk.type, at least).
You may refine this a bit by knowing which are the possible values of lk.type of course. I.e. what are the extremes for the YG "subtype"? YG00-YG99? YG-YGZ?
(Be especially careful if you may have YG81 or YG87 for example, because then my clause will not work properly... on the other hand if your YG subtype can have values like YG34 it would have been better to use YG08 instead of YG8)
I have searched for days on how to get around this error while trying to update a field from a multiple join table, with a minimum date from the same mutiple join tableset.
This is my Update statement:
update vtiger_projectmilestone
Inner Join vtiger_projectmilestonecf ON vtiger_projectmilestone.projectmilestoneid = vtiger_projectmilestonecf.projectmilestoneid
Inner Join vtiger_crmentity ON vtiger_projectmilestone.projectmilestoneid = vtcrmm.crmid
inner join vtiger_project on vtiger_project.projectid = vtiger_projectmilestone.projectid
Inner Join vtiger_crmentity vtcrmp ON vtcrmp.crmid = vtiger_project.projectid
set vtiger_projectmilestone.projectmilestonedate =
(select min(vtiger_projecttaskcf.cf_779)
FROM vtiger_projecttask tvpt
Inner Join vtiger_projecttaskcf tvptcf ON tvpt.projecttaskid = tvptcf.projecttaskid
Inner Join vtiger_projectmilestone tvpm ON tvpm.projectmilestoneid = tvpt.projecttasknumber
Inner Join vtiger_projectmilestonecf vtpmcf ON tvpm.projectmilestoneid = tvpmcf.projectmilestoneid
Inner Join vtiger_crmentity AS vtcrmm ON tvpm.projectmilestoneid = vtcrmm.crmid
Inner Join vtiger_crmentity AS vtcrmt ON tvpt.projecttaskid = vtcrmt.crmid
where tvpm.projectmilestone_no = vtiger_projectmilestone.projectmilestone_no
)
where vtiger_projectmilestone.projectid =
(select vtiger_project.projectid from vtiger_project
INNER JOIN vtiger_crmentity vtcrmp ON vtiger_project.projectid = vtcrmp.crmid
where vtcrmp.deleted = 0 order by vtiger_project.projectid desc limit 1)
and vtcrmp.deleted = 0
and vtcrmm.deleted = 0
and (vtiger_projectmilestone.projectmilestonedate is null or vtiger_projectmilestonecf.cf_763 is null) ;
This is a real life update query, not just a simple one table relationship.
I got round it by creating a temp table, inserting the value, updating the destination table and dropping the temp table.
I would really like to get this right, because it will come up more often.
All assistance is appreciated.
Cheers
Bernard Bailey
As stated in this answer you can't use the target update table in a subquery, as you can see in your query
SELECT min(vtiger_projecttaskcf.cf_779)
FROM vtiger_projecttask tvpt
Inner Join vtiger_projecttaskcf tvptcf ON tvpt.projecttaskid = tvptcf.projecttaskid
Inner Join
--using target update table in query
vtiger_projectmilestone tvpm ON tvpm.projectmilestoneid = tvpt.projecttasknumber
Inner Join vtiger_projectmilestonecf vtpmcf ON tvpm.projectmilestoneid = tvpmcf.projectmilestoneid
Inner Join vtiger_crmentity AS vtcrmm ON tvpm.projectmilestoneid = vtcrmm.crmid
Inner Join vtiger_crmentity AS vtcrmt ON tvpt.projecttaskid = vtcrmt.crmid
where tvpm.projectmilestone_no = vtiger_projectmilestone.projectmilestone_no
However i think that a work around is using the data from the table that you're updating, so instead of using joins, you could write some where conditions for example:
SELECT min(vtiger_projecttaskcf.cf_779)
FROM vtiger_projecttask tvpt
Inner Join vtiger_projecttaskcf tvptcf ON tvpt.projecttaskid = tvptcf.projecttaskid
Inner Join vtiger_projectmilestonecf vtpmcf ON tvpm.projectmilestoneid = tvpt.projecttasknumber
Inner Join vtiger_crmentity AS vtcrmm ON tvpt.projecttasknumber = vtcrmm.crmid
Inner Join vtiger_crmentity AS vtcrmt ON tvpt.projecttaskid = vtcrmt.crmid
where tvpm.projectmilestone_no = vtiger_projectmilestone.projectmilestone_no
--using the projectmilestoneid in a where clause
AND tvpt.projecttasknumber=vtiger_projectmilestone.projectmilestoneid
The caveat could be that probably you will get some performance issues, also, as I don't know the full schema, I can't tell if using other tables in the subquery instead of vtiger_projectmilestone will give you the right result
I have a select:
SELECT
oa.einheit,
op.id, op.artikelnummer,
op.preis_pro_einheit, op.p1_einheit, op.p2_einheit, op.p3_einheit, op.zusatztext, op.position,
oa.artikel, oa.beschreibung, oa.einheit, oa.anzahl_parameter, oa.su_gewerk, oa.mbs_artikel,
oa.mindermenge_kleiner_als, oa.zulage_mindermengen_artikel_nummer,
ae.p1_einheit AS p1_einheit_description,
ae.p2_einheit AS p2_einheit_description,
ae.p3_einheit AS p3_einheit_description
FROM
objekt_position op
INNER JOIN objekt_artikel oa
ON oa.artikelnummer = op.artikelnummer
AND oa.id_objekt = op.id_objekt
AND oa.id_subunternehmer = op.id_subunternehmer
INNER JOIN artikel_einheit ae
ON ae.bezeichnung = oa.einheit
INNER JOIN subunternehmer s
ON s.subunternehmernummer = op.id_subunternehmer
INNER JOIN subunternehmer_user su
ON su.id_subunternehmer = s.subunternehmernummer
WHERE
su.id_user = 1
AND
op.id_objekt = 1486598
AND
oa.artikelnummer = 172
GROUP BY op.id
ORDER BY
op.position
but it seems that my inner join objekt_artikel are not working. what should i change? because i didnt get a result. But there are results in the table.
I've got the query below that's pulling data from a number of tables to create an update:
UPDATE en_inter.subscribers_data AS sd
inner join en_inter.list_subscribers AS ls on sd.subscriberid = ls.subscriberid
LEFT JOIN (
SELECT pd1.email_address,COUNT(pd1.email_address) AS NumDowns
FROM email.papr_down pd1
INNER JOIN email.papr_data pd2 on pd1.paper_id = pd2.id
INNER JOIN email.papr_subj ps on ps.id = pd2.subject
INNER JOIN email.papr_exam pe on pe.id = pd2.exam
INNER JOIN email.papr_levl pl on pl.id = pd2.level
WHERE pd2.exam = 1
and pd2.level = 4
GROUP BY email_address
) AS downs ON downs.email_address = ls.emailaddress
SET sd.data = ifnull(downs.NumDowns,1)
WHERE sd.fieldid = 33;
It works fine but when there are plenty of records in papr_down then it takes ages to process. Any ideas about how it can be optimized?
What I think is the join between the emailAddress is the issue here, you can try out with the join with the Id's.
If you provide us the screen shot of the below query ::
EXPLAIN Select * from
en_inter.subscribers_data AS sd
inner join en_inter.list_subscribers AS ls on sd.subscriberid = ls.subscriberid
LEFT JOIN (
SELECT pd1.email_address,COUNT(pd1.email_address) AS NumDowns
FROM email.papr_down pd1
INNER JOIN email.papr_data pd2 on pd1.paper_id = pd2.id
INNER JOIN email.papr_subj ps on ps.id = pd2.subject
INNER JOIN email.papr_exam pe on pe.id = pd2.exam
INNER JOIN email.papr_levl pl on pl.id = pd2.level
WHERE pd2.exam = 1
and pd2.level = 4
GROUP BY email_address
) AS downs ON downs.email_address = ls.emailaddress
WHERE sd.fieldid = 33
As I know we should use joins only for the columns which are preset in SELECT clause and for other joins we should implement using WHERE clause
Please try following query:
UPDATE en_inter.subscribers_data AS sd
inner join en_inter.list_subscribers AS ls
on sd.subscriberid = ls.subscriberid
LEFT JOIN (
SELECT pd1.email_address,COUNT(pd1.email_address) AS NumDowns
FROM email.papr_down AS pd1
INNER JOIN email.papr_data AS pd2 on pd1.paper_id = pd2.id
WHERE
email.papr_exam.id in (select exam from email.papr_data where exam = 1)
AND
email.papr_levl.id in (select level from email.papr_data where level = 4 )
AND
email.papr_subj.id in (select subject from email.papr_data)
GROUP BY email_address
) AS downs ON downs.email_address = ls.emailaddress
SET sd.data = ifnull(downs.NumDowns,1)
WHERE sd.fieldid = 33;
I can not execute this at my machine since i don't have the schema
I have a problem in a query.
i need to make a page where user can see all reservations he made with movie name, cinema name, seats code that he reserved
i reached this level
SELECT member.member_username, show_datetime, movie_name
FROM `member`
JOIN `reservation` ON `reservation`.`member_id` = `member`.`member_id`
JOIN `show` ON `show`.`show_id`= `reservation`.`show_id`
JOIN `movie` ON `movie`.`movie_id` = `show`.`movie_id`
WHERE `reservation`.`member_id`=1
i need to make a connection and get also the cinema_name from cinema table and seats_code from seat table and theater name
in fact, i need a query to give me all almost all data in my whole database
here is the schema for the DB
http://imageshack.us/photo/my-images/824/58054944.jpg/
JOIN these two tables too:
SELECT
m.member_username,
sh.show_datetime,
v.movie_name,
c.cinema_name,
t.theater_name
FROM member AS m
INNER JOIN reservation AS r ON r.member_id = m.member_id
INNEr JOIN show AS sh ON sh.show_id = r.show_id
INNER JOIN movie AS v ON v.movie_id = s.movie_id
INNER JOIN theater AS t ON t.theater_id = sh.theater_id
INNER JOIN cinema AS c ON c.theater_id = sh.theater_id
WHERE r.member_id = 1
Keep joining your tables
SELECT member.member_username, show_datetime, movie_name, c.cinema_name, t.theater_name
FROM `member`
JOIN `reservation` ON `reservation`.`member_id` = `member`.`member_id`
JOIN `show` ON `show`.`show_id`= `reservation`.`show_id`
JOIN `movie` ON `movie`.`movie_id` = `show`.`movie_id`
JOIN `theater` ON `show`.`theater_id` = `theater`.`theater_id`
JOIN `cinema` ON `theater`.`cinema_id` = `cinema`.`cinema_id`
JOIN `seat` ON `show`.`theater_id` = `seat`.`theater_id`
WHERE `reservation`.`member_id`=1