Firstly, I know ORA-000937 is a common issue, with an obvious answer, but I am yet to find any results that could point to a possible solution.
Quick Spec;
National TB/HIV report, based on patient medical records/encounters/visits and drug's provided. This is only a tiny portion of the report, which loops all patient drugs, and calculates most of it's figures off date calculations, we do not store historic/aggregated data, everything is aggregated when requested. I mention this because I expect a few suggestions to move away from GTT's and to rather use MVIEW's - I hear you, but no, not a solution.
Here is my problem, this is one of my queries populating a GTT, within a function, which stores aggregated results. I have structured my data collection in such away as to reduce server load as the medical table exceeds 12 million records. (Each patient has 3 per default).
Here is the GTT
CREATE GLOBAL TEMPORARY TABLE EKAPAII.TEMP_ART_VISIT_MEDS
(
EPISODE_ID NUMBER,
LAST_MEDS_DATE DATE
)
ON COMMIT DELETE ROWS
RESULT_CACHE (MODE DEFAULT)
NOCACHE;
CREATE UNIQUE INDEX EKAPAII.TEMP_ART_VISIT_MEDS_PK ON EKAPAII.TEMP_ART_VISIT_MEDS
(EPISODE_ID);
ALTER TABLE EKAPAII.TEMP_ART_VISIT_MEDS ADD (
CONSTRAINT TEMP_ART_VISIT_MEDS_PK
PRIMARY KEY
(EPISODE_ID)
USING INDEX EKAPAII.TEMP_ART_VISIT_MEDS_PK
ENABLE VALIDATE);
And my simple insert query
INSERT INTO temp_art_visit_meds (EPISODE_ID, LAST_MEDS_DATE)
SELECT episode_id, encounter_date + number_of_days
FROM ( SELECT enc_meds.episode_id,
MAX (enc_meds.encounter_date) encounter_date,
MAX (
CASE
WHEN (NVL (meds.number_of_days, 0) > 150)
THEN
90
ELSE
NVL (meds.number_of_days, 0)
END)
number_of_days
FROM temp_art_visit enc_meds,
vd_medication meds,
dl_drugs_episode_class dlc,
( SELECT latest_meds_visit.episode_id,
MAX (latest_meds_visit.encounter_date)
encounter_date
FROM temp_art_visit latest_meds_visit,
vd_medication latest_meds,
dl_drugs_episode_class dc
WHERE latest_meds_visit.encounter_id =
latest_meds.encounter_id
AND latest_meds.drug_id = dc.drug_id
AND dc.sd_drug_application_id = 8401
GROUP BY latest_meds_visit.episode_id) latest_meds
WHERE enc_meds.encounter_id = meds.encounter_id
AND enc_meds.episode_id = latest_meds.episode_id
AND enc_meds.encounter_date =
latest_meds.encounter_date
AND meds.drug_id = dlc.drug_id
AND dlc.sd_drug_application_id = 8401
AND meds.active_flag = 'Y'
GROUP BY enc_meds.episode_id);
Now my error, is ORA-000937 not a single-group group function, but if I run this query in a normal editor window it works, but I get ORA-000937 when executing the select query in the package body itself, calling the function does not return any error, even though I have an exception block to handle any errors.
Any help will do, I do understand that this errors could occur only at runtime, and not at compile time? Or is it the fact that I am running the query from the pl/sql block?
Toad for Oracle version 12.5 - in all it's glory. (sarcasm)
Again, pardon me if this has already been asked/answered.
EDIT - SOLUTION
So, after a few hours of trouble shooting, I was able to understand why this error is being generated. Firstly, the fixed query;
INSERT INTO temp_art_visit_meds (EPISODE_ID, LAST_MEDS_DATE)
SELECT enc_meds.episode_id ,
TRUNC( MAX (enc_meds.encounter_date)) + MAX (CASE WHEN (NVL (meds.number_of_days, 0) > 150) THEN 90 ELSE NVL (meds.number_of_days, 0) END) last_meds_date
FROM temp_art_visit enc_meds,
vd_medication meds,
dl_drugs_episode_class dlc,
( SELECT latest_meds_visit.episode_id,
MAX (latest_meds_visit.encounter_date) encounter_date
FROM temp_art_visit latest_meds_visit,
vd_medication latest_meds,dl_drugs_episode_class dc
WHERE latest_meds_visit.encounter_id = latest_meds.encounter_id
AND latest_meds.drug_id = dc.drug_id
AND dc.sd_drug_application_id = 8401
GROUP BY latest_meds_visit.episode_id) latest_meds
WHERE enc_meds.encounter_id = meds.encounter_id
AND enc_meds.episode_id = latest_meds.episode_id
AND enc_meds.encounter_date = latest_meds.encounter_date
AND meds.drug_id = dlc.drug_id
AND dlc.sd_drug_application_id = 8401
AND meds.active_flag = 'Y'
GROUP BY enc_meds.episode_id, meds.number_of_days, enc_meds.encounter_date;
It would appear that problem was due to the amount of sub-queries, I attempted to use different hint optimizers with no avail. If you look closely at the first query, you will notice I am basically aggregating results from aggregated results, so the column's encounter_date, episode_id, number_of_days are no longer 'available', so even if I added the appropriate GROUP BY clause to my last (outer) subquery, Oracle would not be able to group on those column names/identifiers.
I am not sure why this would fail only in a PACKAGE BODY, and did not return any SQLERR or SQLCODE when executed.
Happy days.
Related
I try to find what I missed in the code to retrieve the value of "Last_Maintenance" in a table called "Interventions".
I try to understand the order rules of SQL and the particularities of subqueries without success.
Did I missed something, something basic or an important step?
---Interventions with PkState "Schedule_Visit" with the Last_Maintenance aggregation
SELECT Interventions.ID AS Nro_Inter,
--Interventions.PlacesList AS Nro_Place,
MaintenanceContracts.Num AS Nro_Contract,
Interventions.TentativeDate AS Schedule_Visit,
--MaintenanceContracts.NumberOfVisits AS Number_Visits_Contracts,
--Interventions.VisitNumber AS Visit_Number,
(SELECT MAX(Interventions.AssignmentDate)
FROM Interventions
WHERE PkState = 'AE4B42CF-0003-4796-89F2-2881527DFB26' AND PkMaintenanceContract IS NOT NULL) AS Last_Maintenance --PkState "Maintenance Executed"
FROM Interventions
INNER JOIN MaintenanceContracts ON MaintenanceContracts.Pk = Interventions.PkMaintenanceContract
WHERE PkState = 'AE4B42CF-0000-4796-89F2-2881527ABC26' AND PkMaintenanceContract IS NOT NULL --PkState "Schedule_Visit"
GROUP BY Interventions.AssignmentDate,
Interventions.ID,
Interventions.PlacesList,
MaintenanceContracts.Num,
Interventions.TentativeDate,
MaintenanceContracts.NumberOfVisits,
Interventions.VisitNumber
ORDER BY Nro_Contract
I try to use GROUP BY and HAVING clause in a sub query, I did not succeed. Clearly I am lacking some understanding.
Output
The output of "Last_Maintenance" is the last date of entire contracts in the DB, which is not the desirable output. The desirable output is to know the last date the maintenance was executed for each row, meaning, for each "Nro-Contract". Somehow I need to aggregate like I did below.
In opposition of what mention I did succeed in another table.
In the table Contracts I did had success as you can see.
SELECT
MaintenanceContracts.Num AS Nro_Contract,
MAX(Interventions.AssignmentDate) AS Last_Maintenance
--MaintenanceContracts.Name AS Place
--MaintenanceContracts.StartDate,
--MaintenanceContracts.EndDate
FROM MaintenanceContracts
INNER JOIN Interventions ON Interventions.PkMaintenanceContract = MaintenanceContracts.Pk
WHERE MaintenanceContracts.ActiveContract = 2 OR MaintenanceContracts.ActiveContract = 1 --// 2 = Inactive; 1 = Active
GROUP BY MaintenanceContracts.Num, MaintenanceContracts.Name,
MaintenanceContracts.StartDate,
MaintenanceContracts.EndDate
ORDER BY Nro_Contract
I am struggling to understanding how nested queries works and how I can leverage in a simple manner the queries.
I think you're mixed up in how aggregation works. The MAX function will get a single MAX value over the entire dataset. What you're trying to do is get a MAX for each unique ID. For that, you either use derived tables, subqueries or windowed functions. I'm a fan of using the ROW_NUMBER() function to assign a sequence number. If you do it correctly, you can use that row number to get just the most recent record from a dataset. From your description, it sounds like you always want to have the contract and then get some max values for that contract. If that is the case, then you're second query is closer to what you need. Using windowed functions in derived queries has the added benefit of not having to worry about using the GROUP BY clause. Try this:
SELECT
MaintenanceContracts.Num AS Nro_Contract,
--MaintenanceContracts.Name AS Place
--MaintenanceContracts.StartDate,
--MaintenanceContracts.EndDate
i.AssignmentDate as Last_Maintenance
FROM MaintenanceContracts
INNER JOIN (
SELECT *
--This fuction will order the records for each maintenance contract.
--The most recent intervention will have a row_num = 1
, ROW_NUMBER() OVER(PARTITION BY PkMaintenanceContract ORDER BY AssignmentDate DESC) as row_num
FROM Interventions
) as i
ON i.PkMaintenanceContract = MaintenanceContracts.Pk
AND i.row_num = 1 --Used to get the most recent intervention.
WHERE MaintenanceContracts.ActiveContract = 2
OR MaintenanceContracts.ActiveContract = 1 --// 2 = Inactive; 1 = Active
ORDER BY Nro_Contract
;
I have the following query:
SELECT DISTINCT
CAB.CODPARC,
PAR.RAZAOSOCIAL,
BAI.NOMEBAI,
SUM(VLRNOTA) AS AMOUNT
FROM TGFCAB CAB, TGFPAR PAR, TSIBAI BAI
WHERE CAB.CODPARC = PAR.CODPARC
AND PAR.CODBAI = BAI.CODBAI
AND CAB.TIPMOV = 'V'
AND STATUSNOTA = 'L'
AND PAR.CODCID = 5358
GROUP BY
CAB.CODPARC,
PAR.RAZAOSOCIAL,
BAI.NOMEBAI
Which the result is this. Company names and neighborhood hid for obvious reasons
The query at the moment, for those who don't understand Latin languages, is giving me clients, company name, company neighborhood, and the total value of movements.
in the WHERE clause it is only filtering sales movements of companies from an established city.
But if you notice in the Select statement, the column that is retuning the value that aggregates the total amount of value of sales is a SUM().
My goal is to return only the company that have the maximum value of this column, if its a tie, display both of em.
This is where i'm struggling, cause i can't seem to find a simple solution. I tried to use
WHERE AMOUNT = MAX(AMOUNT)
But as expected it didn't work
You tagged the question with the whole bunch of different databases; do you really use all of them?
Because, "PL/SQL" reads as "Oracle". If that's so, here's one option.
with temp as
-- this is your current query
(select columns,
sum(vrlnota) as amount
from ...
where ...
)
-- query that returns what you asked for
select *
from temp t
where t.amount = (select max(a.amount)
from temp a
);
You should be able to achieve the same without the need for a subquery using window over() function,
WITH T AS (
SELECT
CAB.CODPARC,
PAR.RAZAOSOCIAL,
BAI.NOMEBAI,
SUM(VLRNOTA) AS AMOUNT,
MAX(VLRNOTA) over() AS MAMOUNT
FROM TGFCAB CAB
JOIN TGFPAR PAR ON PAR.CODPARC = CAB.CODPARC
JOIN TSIBAI BAI ON BAI.CODBAI = PAR.CODBAI
WHERE CAB.TIPMOV = 'V'
AND STATUSNOTA = 'L'
AND PAR.CODCID = 5358
GROUP BY CAB.CODPARC, PAR.RAZAOSOCIAL, BAI.NOMEBAI
)
SELECT CODPARC, RAZAOSOCIAL, NOMEBAI, AMOUNT
FROM T
WHERE AMOUNT=MAMOUNT
Note it's usually (always) beneficial to join tables using clear explicit join syntax. This should be fine cross-platform between Oracle & SQL Server.
I am using a NOT EXSITS clause in my query and wanted to make sure it was working correctly since I was getting lesser rows than expected.
SELECT DISTINCT offer.courier_uuid,
offer.region_uuid,
offer.offer_time_local,
Cast(scores.acceptance_rate AS DECIMAL(5, 3)) AS acceptance_rate
FROM integrated_delivery.trip_offer_fact offer
JOIN integrated_product.driver_score_v2 scores ON offer.courier_uuid = scores.courier_id
AND offer.region_uuid = scores.region_id
AND offer.business_day BETWEEN date '2019-04-04' AND date '2019-04-07'
AND scores.extract_dt = 20190331
AND NOT EXISTS
(SELECT NULL
FROM source_cassandra_courier_scheduling.assigned_block_by_id_v2 sched
JOIN source_cassandra_delivery.region r ON sched.region_id = r.id
WHERE offer.courier_uuid = sched.courier_id
AND offer.offer_time_local >= date_parse(date_format(AT_TIMEZONE("start",r.time_zone),'%Y-%m-%d %H:%i:%s'),'%Y-%m-%d %H:%i:%s')
AND offer.offer_time_local <= date_parse(date_format(AT_TIMEZONE("end",r.time_zone),'%Y-%m-%d %H:%i:%s'),'%Y-%m-%d %H:%i:%s')
AND element_at(sched.state,-1) = 'ASSIGNED')
ORDER BY 3
Is there anything wrong with my not exists clause? I am only asking since I am getting back lesser rows than expected. The not exists caluse contains a time conversion but i dont think that would affect anything.
I am trying to get all possible ids and their offer times that do NOT EXIST in the scheduled shifts table. I wanted confirm if the way I have the NOT EXISTS clause is correct or if there is something else I would need that would correctly pull all records that exist or not exist in that shed table?
I'm trying to avoid using straight up SQL in my Rails app, but need to do a quite large version of this:
SELECT ds.product_id,
( SELECT SUM(units) FROM daily_sales WHERE (date BETWEEN '2015-01-01' AND '2015-01-08') AND service_type = 1 ) as wk1,
( SELECT SUM(units) FROM daily_sales WHERE (date BETWEEN '2015-01-09' AND '2015-01-16') AND service_type = 1 ) as wk2
FROM daily_sales as ds group by ds.product_id
I'm sure it can be done, but i'm struggling to write this as an active record statement. Can anyone help?
If you must do this in a single query, you'll need to write some SQL for the CASE statements. The following is what you need:
ranges = [ # ordered array of all your date-ranges
Date.new(2015, 1, 1)..Date.new(2015, 1, 8),
Date.new(2015, 1, 9)..Date.new(2015, 1, 16)
]
overall_range = (ranges.first.min)..(ranges.last.max)
grouping_sub_str = \
ranges.map.with_index do |range, i|
"WHEN (date BETWEEN '#{range.min}' AND '#{range.max}') THEN 'week#{i}'"
end.join(' ')
grouping_condition = "CASE #{grouping_sub_str} END"
grouping_columns = ['product_id', grouping_condition]
DailySale.where(date: overall_range).group(grouping_columns).sum(:units)
That will produce a hash with array keys and numeric values. A key will be of the form [product_id, 'week1'] and the value will be the corresponding sum of units for that week.
Simplify your SQL to the following and try converting it..
SELECT ds.product_id,
, SUM(CASE WHEN date BETWEEN '2015-01-01' AND '2015-01-08' AND service_type = 1
THEN units
END) WK1
, SUM(CASE WHEN date BETWEEN '2015-01-09' AND '2015-01-16' AND service_type = 1
THEN units
END) WK2
FROM daily_sales as ds
group by ds.product_id
Every rail developer sooner or later hits his/her head against the walls of Active Record query interface just to find the solution in Arel.
Arel gives you the flexibility that you need in creating your query without using loops, etc. I am not going to give runnable code rather some hints how to do it yourself:
We are going to use arel_tables to create our query. For a model called for example Product, getting the Arel table is as easy as products = Product.arel_table
Getting sum of a column is like daily_sales.project(daily_sales[:units].count).where(daily_sales[:date].gt(BEGIN_DATE).where(daily_sales[:date].lt(END_DATE). You can chain as many wheres as you want and it will be translated into SQL ANDs.
Since we need to have multiple sums in our end result you need to make use of Common Table Expressions(CTE). Take a look at docs and this answer for more info on this.
You can use those CTEs from step 3 in combination with group and you are done!
I have the following query below (view) in SQL Server. The query produces a result set that is needed to populate a grid. However, a new requirement has come up where the users would like to see data on one row in our app. The tblTasks table can produce 1 or 2 rows. The issue becomes when they're is two rows that have the same job_number but different fldProjectContextId (1 or 31). I need to get the MechApprovalOut and ElecApprovalOut columns on one row instead of two.
I've tried restructuring the query using CTE and over partition and haven't been able to get the necessary results I need.
SELECT TOP (100) PERCENT
CAST(dbo.Job_Control.job_number AS int) AS Job_Number,
dbo.tblTasks.fldSalesOrder, dbo.tblTaskCategories.fldTaskCategoryName,
dbo.Job_Control.Dwg_Sent, dbo.Job_Control.Approval_done,
dbo.Job_Control.fldElecDwgSent, dbo.Job_Control.fldElecApprovalDone,
CASE WHEN DATEDIFF(day, dbo.Job_Control.Dwg_Sent, GETDATE()) > 14
AND dbo.Job_Control.Approval_done IS NULL
AND dbo.tblProjectContext.fldProjectContextID = 1
THEN 1 ELSE 0
END AS MechApprovalOut,
CASE WHEN DATEDIFF(day, dbo.Job_Control.fldElecDwgSent, GETDATE()) > 14
AND dbo.Job_Control.fldElecApprovalDone IS NULL
AND dbo.tblProjectContext.fldProjectContextID = 31
THEN 1 ELSE 0
END AS ElecApprovalOut,
dbo.tblProjectContext.fldProjectContextName,
dbo.tblProjectContext.fldProjectContextId, dbo.Job_Control.Drawing_Info,
dbo.Job_Control.fldElectricalAppDwg
FROM dbo.tblTaskCategories
INNER JOIN dbo.tblTasks
ON dbo.tblTaskCategories.fldTaskCategoryId = dbo.tblTasks.fldTaskCategoryId
INNER JOIN dbo.Job_Control
ON dbo.tblTasks.fldSalesOrder = dbo.Job_Control.job_number
INNER JOIN dbo.tblProjectContext
ON dbo.tblTaskCategories.fldProjectContextId = dbo.tblProjectContext.fldProjectContextId
WHERE (dbo.tblTaskCategories.fldTaskCategoryName = N'Approval'
OR dbo.tblTaskCategories.fldTaskCategoryName = N'Re-Approval')
AND (CASE WHEN DATEDIFF(day, dbo.Job_Control.Dwg_Sent, GETDATE()) > 14
AND dbo.Job_Control.Approval_done IS NULL
AND dbo.tblProjectContext.fldProjectContextID = 1
THEN 1 ELSE 0
END = 1)
OR (dbo.tblTaskCategories.fldTaskCategoryName = N'Approval'
OR dbo.tblTaskCategories.fldTaskCategoryName = N'Re-Approval')
AND (CASE WHEN DATEDIFF(day, dbo.Job_Control.fldElecDwgSent, GETDATE()) > 14
AND dbo.Job_Control.fldElecApprovalDone IS NULL
AND dbo.tblProjectContext.fldProjectContextID = 31
THEN 1 ELSE 0
END = 1)
ORDER BY dbo.Job_Control.job_number, dbo.tblTaskCategories.fldProjectContextId
The above query gives me the following result set:
I've created a work around via code (which I don't like but it works for now) where i've used code to populate a "temp" table the way i need it to display the data, that is, one record if duplicate job numbers to get the MechApprovalOut and ElecApprovalOut columns on one row (see first record in following screen shot).
Example:
With the desired result set and one row per job_number, this is how the form looks with the data and how I am using the result set.
Any help restructuring my query to combine duplicate rows with the same job number where MechApprovalOut and ElecApproval out columns are on one row is greatly appreciated! I'd much prefer to use a view on SQL then code in the app to populate a temp table.
Thanks,
Jimmy
What I would do is LEFT JOIN the main table to itself at the beginning of the query, matching on Job Number and Sales Order, such that the left side of the join is only looking at Approval task categories and the right side of the join is only looking at Re-Approval task categories. Then I would make extensive use of the COALESCE() function to select data from the correct side of the join for use later on and in the select clause. This may also be the piece you were missing to make a CTE work.
There is probably also a solution that uses a ranking/windowing function (maybe not RANK itself, but something that category) along with the PARTITION BY clause. However, as those are fairly new to Sql Server I haven't used them enough personally to be comfortable writing an example solution for you without direct access to the data to play with, and it would still take me a little more time to get right than I can devote to this right now. Maybe this paragraph will motivate someone else to do that work.