I received some great help on joining a table to itself and am trying to take it to the next level. The SQL below is from the help but with my addition of the select line beginning with COUNT, the inner join to the Recipient table, and the Group By.
SELECT
Event.EventID AS EventID,
Event.EventDate AS EventDateUTC,
Participant2.ParticipantID AS AwayID,
Participant1.ParticipantID AS HostID,
COUNT(Recipient.ChallengeID) AS AllChallenges
FROM Event
INNER JOIN Matchup Matchup1
ON (Event.EventID = Matchup1.EventID)
INNER JOIN Matchup Matchup2
ON (Event.EventID = Matchup2.EventID)
INNER JOIN Participant Participant1
ON (Matchup1.Host = 1
AND Matchup1.ParticipantID = Participant1.ParticipantID)
INNER JOIN Participant Participant2
ON (Matchup2.Host != 1
AND Matchup2.ParticipantID = Participant2.ParticipantID)
INNER JOIN Recipient
ON (Event.EventID = Recipient.EventID)
WHERE Event.CategoryID = 1
AND Event.Resolved = 0
AND Event.Type = 1
GROUP BY Recipient.ChallengeID
ORDER BY EventDateUTC ASC
My goal is to get a count of how many rows in the Recipient table match the EventID in Event. This code works fine except that I also want to get results where there are 0 matching rows in Recipient. I want 15 rows (= the number of events) but I get 2 rows, one with a count of 1 and one with a count of 2 (which is appropriate for an inner join as there are 3 rows in the sample Recipient table, one for one EventID and two for another EventID).
I thought that either a LEFT join or an OUTER join was what I was looking for, but I know that I'm not quite getting how the tables are actually joined. A LEFT join there gives me one more row with 0, which happens to be EventID 1 (first thing in the table), but that's all. Errors advise me that I can't just change that INNER join to an OUTER. I tried some parenthesizing and some subselects and such but can't seem to make it work.
Use:
SELECT e.eventid,
e.eventdate AS EventDateUTC,
p2.participantid AS AwayID,
p1.participantid AS HostID,
COUNT(r.challengeid) AS AllChallenges
FROM EVENT e
JOIN Matchup m1 ON m1.eventid = e.eventid
AND m1.host = 1
JOIN Matchup m2 ON m2.eventid = e.eventid
AND m2.host != 1
JOIN Participant p1 ON p1.participantid = m1.participantid
JOIN Participant p2 ON p2.participantid = m2.participantid
LEFT JOIN RECIPIENT r ON r.eventid = e.eventid
WHERE e.categoryid = 1
AND e.resolved = 0
AND e.type = 1
GROUP BY e.eventid, e.eventdate, p2.participantid, p1.participantid
ORDER BY e.eventdate
Related
I have the below query with multiple joins.The last 3 joins are required to get the g.fin_id value. This works fine (see results) BUT because some records in the ACCUM_ISS_CHAR_HIST table have e.char9_nme values of NULL, it excludes the records in the results altogether. So it seems as when the e.char9_nme value has a record then it will produce a result, but as soon as it has a Null value then it is excluded. I would still like to see the records even though the g.fin_id for those will then be blank because they have a e.char9_nme value of Null. How can I change the query to accomplish this?
select
a.acct_id,
c.fld3_txt,
b.issue_loc1_cde,
b.instr_id,
a.fld1_nme,
b.issue_cls2_nme,
g.fin_id,
e.char9_nme
from position_dg as a
inner join
infoportal..issue_dg as b on b.INSTR_ID = a.INSTR_ID
inner join
InfoPortal..IVW_ACCT as c on a.acct_id = c.acct_id
inner join
InfoPortal..DW_AcctCharDG as d on a.acct_id = d.acctid
inner join
ACCUM_ISS_CHAR_HIST as e on a.instr_id = e.instr_id
inner join
MD_FINANCIAL_ENTITY as f on e.char9_nme = f.fin_enty_name
inner join md_FINANCIAL_ENTITY_ALTERNATE_IDENTIFIER as g on
f.fin_enty_id = g.fin_enty_id
and b.MAT_EXP_DTE > getdate()
and b.issue_cls1_nme = 'Derivatives'
and a.as_of_tms >= getdate()-1
and b.iss_typ in ('FFX','IRS','EQF')
and d.AcctChrSetId = 'DerivativeRpt'
and d.EndTms IS NULL
and a.acct_id = 'FOGEMBLCR'
and g.id_ctxt_typ = 'LEGAL_ENTITY_IDENTIFIER'
and e.as_of_dte = (
select MAX (as_of_dte)-1
from accum_iss_char_hist
)
I expect the results to show fin_id records for some ond blank fin_id records for some, but at the moment only the ones with a fin_id record is hown and the rest is excluded from the results.
You are looking for a left join.
Join all those tables (last 3 as you said) as left join. For better clarity I have moved conditions of every tables in their ON clause and for base table a made a where clause.
select
a.acct_id,
c.fld3_txt,
b.issue_loc1_cde,
b.instr_id,
a.fld1_nme,
b.issue_cls2_nme,
g.fin_id,
e.char9_nme
from position_dg as a
inner join
infoportal..issue_dg as b on b.INSTR_ID = a.INSTR_ID
and b.MAT_EXP_DTE > getdate()
and b.issue_cls1_nme = 'Derivatives'
and b.iss_typ in ('FFX','IRS','EQF')
inner join
InfoPortal..IVW_ACCT as c on a.acct_id = c.acct_id
inner join
InfoPortal..DW_AcctCharDG as d on a.acct_id = d.acctid
and d.AcctChrSetId = 'DerivativeRpt'
and d.EndTms IS NULL
left join
ACCUM_ISS_CHAR_HIST as e on a.instr_id = e.instr_id
and e.as_of_dte = (
select MAX (as_of_dte)-1
from accum_iss_char_hist
)
left join
MD_FINANCIAL_ENTITY as f on e.char9_nme = f.fin_enty_name
left join
md_FINANCIAL_ENTITY_ALTERNATE_IDENTIFIER as g on f.fin_enty_id = g.fin_enty_id
and g.id_ctxt_typ = 'LEGAL_ENTITY_IDENTIFIER'
Where a.as_of_tms >= getdate()-1
and a.acct_id = 'FOGEMBLCR'
I'm stuck on an exercise where I need to count the total amount of unique visits to planets, but if the planet is the moon (maan), then it should be counted twice. Also the client number should be 121
select case
when objectnaam = 'Maan' then count(objectnaam)
else count(distinct objectnaam)
end as aantal_bezoeken
from klanten inner join deelnames on klanten.klantnr = deelnames.klantnr
inner join reizen on deelnames.reisnr = reizen.reisnr
inner join bezoeken on reizen.reisnr = bezoeken.reisnr
where klanten.klantnr = 121
group by objectnaam
And it gives me this result
aantal_bezoeken
1
4
1
1
but the result should be
aantal_bezoeken
7
I just need to add all these values together but I don't know how to,
or maybe there's a better more simple solution. It should be without subqueries
Try this:
select sum(aantal_bezoeken) as aantal_bezoeken from
(select case
when objectnaam = 'Maan' then count(objectnaam)
else count(distinct objectnaam)
end as aantal_bezoeken
from klanten inner join deelnames on klanten.klantnr = deelnames.klantnr
inner join reizen on deelnames.reisnr = reizen.reisnr
inner join bezoeken on reizen.reisnr = bezoeken.reisnr
where klanten.klantnr = 121
group by objectnaam) as a
Here's the structure of my database (used to collect info from a survey):
question_responses->answer_choices->subquestions->questions->survey
| ^
V |
submissions->response_group<----------------------------survey_deployment
where A->B means A has the PK of B
So, I want to get the responses of a particular user; let's say that his submission pk is 1. I had written the query
select question_responses.answer_text
from submissions join question_responses on (question_responses.submission_pk = submission.pk)
join answer_choices on (question_responses.answer_choices_pk = answer_choices.pk)
join subquestions on (answer_choices.subquestions_pk = subquestions.pk)
right join questions on (subquestions.questions_pk = questions.pk)
where submissions.pk = 1
order by questions.order
It is possible to not answer questions. In such a case, there is no question_responses.pk recorded. I would still like to be able to account for skipping, so I need this record to be returned, even if there is no response. I thought that the right join would have accounted for this record, but apparently not.
Any help is greatly appreciated.
Because you have submissions.pk = 1 in the where clause this effectively turns your outer join into an inner join, since any missing submission will have a pk of null. and null = 1 is not true.
You could rewrite your query using a LEFT JOIN, and selecting from questions:
select question_responses.answer_text
from questions
left join (subquestions
inner join answer_choices
on answer_choices.subquestions_pk = subquestions.pk
inner join question_responses
on question_responses.answer_choices_pk = answer_choices.pk
inner join submissions
on question_responses.submission_pk = submission.pk)
on subquestions.questions_pk = questions.pk
and submissions.pk = 1
order by questions.order;
This is similar to doing something like:
select subquery.answer_text
from questions
left join
( select question_responses.answer_text, subquestions.questions_pk
from subquestions
inner join answer_choices
on answer_choices.subquestions_pk = subquestions.pk
inner join question_responses
on question_responses.answer_choices_pk = answer_choices.pk
inner join submissions
on question_responses.submission_pk = submission.pk
where submissions.pk = 1
) subquery
on subquery.questions_pk = questions.pk
order by questions.order;
but depending on your dbms the former may perform better as it has no derived tables.
Check out this, does it help?
SELECT question_responses.answer_text
FROM questions LEFT JOIN subquestions on (subquestions.questions_pk = questions.pk)
LEFT JOIN answer_choices on (answer_choices.subquestions_pk = subquestions.pk)
LEFT JOIN question_responses on (question_responses.answer_choices_pk = answer_choices.pk)
LEFT JOIN submissions on (question_responses.submission_pk = submission.pk)
WHERE submissions.pk = 1
ORDER BY questions.order
I have the following query:
SELECT min(salesorder.SOM_SalesOrderID) AS salesorder,
Item.IMA_ItemID,
Item.IMA_ItemName,
Customer.CUS_CorpName,
WK.WKO_WorkOrderID,
min(WK.WKO_OrigRequiredDate),
WK.WKO_WorkOrderTypeCode,
min(WK.WKO_RequiredDate),
max(WK.WKO_LastWorkDate),
min(wk.WKO_RequiredQty),
wk.WKO_MatlIssueDate,
min(SalesOrderDelivery.SOD_RequiredQty),
Item.IMA_ItemTypeCode,
Item.IMA_OnHandQty,
min(SalesOrderDelivery.SOD_PromiseDate),
min(WO.woo_operationseqID) AS seqid
FROM SalesOrder
INNER JOIN SalesOrderLine ON SalesOrder.SOM_RecordID = SalesOrderLine.SOI_SOM_RecordID
INNER JOIN SalesOrderDelivery ON SalesOrderLine.SOI_RecordID = SalesOrderDelivery.SOD_SOI_RecordID,
WO.
INNER JOIN Item ON SalesOrderLine.SOI_IMA_RecordID = Item.IMA_RecordID
INNER JOIN WKO wk ON Item.IMA_ItemID = WK.WKO_ItemID
INNER JOIN Customer ON SalesOrder.SOM_CUS_RecordID = Customer.CUS_RecordID
INNER JOIN woo WO ON WO.WOO_WorkOrderID = WK.WKO_WorkOrderID
WHERE wk.WKO_StatusCode = 'Released'
AND WO.WOO_StatusCode IS NULL
AND SalesOrderDelivery.SOD_ShipComplete = 'false'
GROUP BY WK.WKO_WorkOrderID,
Item.IMA_ItemID,
Item.IMA_ItemName,
Customer.CUS_CorpName,
WK.WKO_WorkOrderTypeCode,
wk.WKO_MatlIssueDate,
Item.IMA_ItemTypeCode,
Item.IMA_OnHandQty
I need 1 record returned for each wk.wko_workorderid. There is a field that is not included that I'm not sure how to get. I need to retrieve the woo.woo_workcenterid that corresponds to min(WO.woo_operationseqID)as seqid. I cannot include it in the general query since there are multiple workcenterids in the table and I only want the specific one that is part of the min operation sequence record.
Any help would be appreciated.
I am extracting data from multiple tables. mt query is as follows:
SELECT p.Record_Num as RecordNum
,p.GCD_ID as GCDID
,p.Project_Desc as ProjectDesc
,p.Proponent_Name as ProponentName
,st.Station_Name as StationName
,p.OpCentre as OpCentre
,s.Sector_Name as SectorName
,p.PLZone as PLZone
,f.Feeder_Desc as FeederDesc
,d.DxTx_Desc as DxTx
,op.Op_Control_Desc as OpControl
,t.Type_Desc as Type
,c.Conn_Desc as ConnectionKV
,ss.Status_Desc as Status
,p.MW as MW
,p.Subject as Subject
,p.Ip_Num as IpNum
,p.H1N_ID as H1NID
,p.NOMS_Slip_Num as NomsSlipNum
,p.NMS_Updated as NmsUpdated
,p.Received_Date as ReceivedDate
,p.Actual_IS_Date as ActualISDate
,p.Scheduled_IS_Date as ScheduledIsDate
,stst.Station_Name as UpStation
,ff.Feeder_Desc as UpFeeder
,p.HV_Circuit as HVCircuit
,p.SIA_Required as SIAReqd
FROM Project_Detail p,
Station st, Sector s, Feeder f, DxTx d, Operational_Control op, Type t,
Connection_Kv c, Status ss, Station stst, Feeder ff
WHERE
p.Station_ID = st.Station_ID and
p.Sector_ID = s.Sector_ID and
p.Feeder = f.Feeder_ID and
p.DxTx_ID = d.DxTx_ID and
p.OpControl_ID = op.Op_Control_ID and
p.Type_ID= t.Type_ID and
p.ConnKV_ID = c.Conn_ID and
p.Status_ID = ss.Status_ID and
p.UP_Station_ID = stst.Station_ID and
p.UP_Feeder_ID = ff.Feeder_ID
The problem with this query is if it doesnot find an associated value in the second table, it doesnot show the row.
for example : every project has feeders. so if a project_detail table has a feederid which doesnot have an association in the feeder table, then it wont show the row. also, there are times when the feeders are not assigned to a project.
i think i have to use outer joins to get the values. but i cannot figure out how to do that.
please help.
SELECT *
FROM Project_Detail p
LEFT JOIN
Station st
ON p.Station_ID = st.Station_ID
LEFT JOIN
Sector s
ON p.Sector_ID = s.Sector_ID
…
You need LEFT OR FULL OUTER JOINS instead of the inner joins you are now using with your where clause.
SELECT p.Record_Num as RecordNum
,p.GCD_ID as GCDID
,p.Project_Desc as ProjectDesc
,p.Proponent_Name as ProponentName
,st.Station_Name as StationName
,p.OpCentre as OpCentre
,s.Sector_Name as SectorName
,p.PLZone as PLZone
,f.Feeder_Desc as FeederDesc
,d.DxTx_Desc as DxTx
,op.Op_Control_Desc as OpControl
,t.Type_Desc as Type
,c.Conn_Desc as ConnectionKV
,ss.Status_Desc as Status
,p.MW as MW
,p.Subject as Subject
,p.Ip_Num as IpNum
,p.H1N_ID as H1NID
,p.NOMS_Slip_Num as NomsSlipNum
,p.NMS_Updated as NmsUpdated
,p.Received_Date as ReceivedDate
,p.Actual_IS_Date as ActualISDate
,p.Scheduled_IS_Date as ScheduledIsDate
,stst.Station_Name as UpStation
,ff.Feeder_Desc as UpFeeder
,p.HV_Circuit as HVCircuit
,p.SIA_Required as SIAReqd
FROM Project_Detail p
LEFT OUTER JOIN Station st ON p.Station_ID = st.Station_ID
LEFT OUTER JOIN Sector s ON p.Sector_ID = s.Sector_ID
LEFT OUTER JOIN Feeder f ON p.Feeder = f.Feeder_ID
LEFT OUTER JOIN DxTx d ON p.DxTx_ID = d.DxTx_ID
LEFT OUTER JOIN Operational_Control op ON p.OpControl_ID = op.Op_Control_ID
LEFT OUTER JOIN Type t ON p.Type_ID= t.Type_ID
LEFT OUTER JOIN Connection_Kv c ON p.ConnKV_ID = c.Conn_ID
LEFT OUTER JOIN Status ss ON p.Status_ID = ss.Status_ID
LEFT OUTER JOIN Station stst ON p.UP_Station_ID = stst.Station_ID
LEFT OUTER JOIN Feeder ff ON p.UP_Feeder_ID = ff.Feeder_ID