I have a reservation table which the user will insert records into.
The User does not select the car just the type.
Once the record is inserted I want some triggers to do the following:-
The date and vehicle combination to a log file the data and vehicle are UNIQUE(date,car) so the same reservation cannot be made twice therefore a car cannot be double booked.
SO my issue is how do I now get the trigger to select the next available car of that type?
I can get it to select the next car by just saying Car.carid != Log.carid but that is not using the date as a second check so I could not then use the vehicle on another date.
Simply putting AND between the check doesnt work meaning
WHERE Car.carid != Log.carid AND Reservation.date != C.datewhen
Some guidance would be much appreciated!
I think this query is what you are after...
SELECT MIN(c.carid)
FROM all_cars c
WHERE c.type = 'CAR TYPE'
AND NOT EXISTS
(SELECT 1
FROM reservation r
WHERE r.date = 'THE DATE'
AND r.carid = c.carid)
If the query returns a NULL value then no cars are available.
Or you could take off the MIN and just use the first record returned.
Related
String record : Blueoba Mountain Company
SQL Query :
SELECT from table
WHERE CATSEARCH(account_partner_name_type,'%Blueoba% %Mountain% %Company%', NULL) > 0)
where rn <=500;
If I write the full name of the string in the query (i.e.%Blueoba% %Mountain% %Company%) then it gives me the record.
But if I write %Blueoba% %Mountain% %Comp% or %Blue% %Company% or %Comp% then its not returning any record.
So ideally, if I write a word %comp% then it should search all the records which contains 'comp' word and show the records but its not showing.
Can anybody suggest something?
You can try using wild card characters
SELECT * from table
WHERE account_partner_name_type like '%Blueoba%'
and rn <=500;
I want to create a browse such that it will show all the records from one table if the values of a field do NOT exist in another table.
It is possible to get the records using SQL as:
SELECT myField FROM pub.myTable WHERE
NOT EXISTS (SELECT myField FROM pub.myTable2 WHERE myTable2.myField=myTable.myField)
It is also possible using 4GL as:
FOR EACH myTable WHERE
NOT CAN-FIND(FIRST myTable2 WHERE myTable2.myField=myTable.myField)
The problem is when I put this query in a browse as:
OPEN QUERY myBrowse
FOR EACH myTable WHERE
NOT CAN-FIND(FIRST myTable2 WHERE myTable2.myField=myTable.myField)
it gives an error message
CAN-FIND is invalid within an OPEN QUERY. (3541)
The question is, is it possible to write such an OPEN QUERY statement?
I didn't come up with this, Steve Moore shared it on https://community-archive.progress.com/forums/00026/27143.html
define temp-table ttNoOrder
field field1 as char.
create ttNoOrder.
define query q1 for Customer, Order, ttNoOrder.
open query q1 for each Customer no-lock,
first Order of Customer outer-join no-lock,
first ttNoOrder where not available(Order).
get first q1.
repeat while not query-off-end("q1"):
display Customer.CustNum Customer.Name available(Order).
get next q1.
end.
Works even with dynamic queries:
DEFINE TEMP-TABLE ttNoOrder
FIELD field1 AS CHARACTER .
DEFINE VARIABLE hQuery AS HANDLE NO-UNDO.
CREATE ttNoOrder.
CREATE QUERY hQuery .
hQuery:SET-BUFFERS (BUFFER Customer:HANDLE,
BUFFER Order:HANDLE,
BUFFER ttNoOrder:HANDLE) .
hQuery:QUERY-PREPARE ("for each Customer no-lock, ~
first Order of Customer outer-join no-lock, ~
first ttNoOrder where not available(Order)") .
hQuery:QUERY-OPEN() .
hQuery:GET-FIRST () .
REPEAT WHILE NOT hQuery:QUERY-OFF-END:
DISPLAY Customer.CustNum FORMAT ">>>>>>>>>9" Customer.Name AVAILABLE(Order).
hQuery:GET-NEXT ().
END.
I’m attempting to count records that match specific criteria, including one field being null, but including the null clause results in no records being found.
If I output the contents of the field, it comes back as “(null)”. I’ve tried IS NULL and ISNULL, both of which appear that they should work when looking at other sources, but they both fail for me.
SELECT calls.contact_number, calls.contact_name, COUNT(notes.id) AS note_count
FROM calls LEFT JOIN notes on calls.id = notes.call_id
WHERE calls.contact_number = "123" AND notes.group_id ISNULL
GROUP BY calls.contact_number
This returns no records, whereas I’m expecting it to return one.
Move the condition in the ON clause:
SELECT calls.contact_number, calls.contact_name, COUNT(notes.id) AS note_count
FROM calls LEFT JOIN notes
ON calls.id = notes.call_id AND notes.group_id IS NULL
WHERE calls.contact_number = "123"
GROUP BY calls.contact_number, calls.contact_name
After grabbing a copy of the database, the notes.group_id field was determined to be an integer type, and the record in question actually contained a 0.
The successful query ended up being
SELECT calls.contact_number, calls.contact_name, COUNT(notes.id) as note_count
FROM calls LEFT JOIN notes
ON calls.id = notes.call_id
WHERE calls.contact_number = “123” AND (notes.group_id IS NULL OR notes.group_id = 0)
GROUP BY calls.contact_number
Not sure why the NSLog output of the returned value for group_id was ‘(null)’, some weird conversion?
I have an ASP.NET Web API app using Oracle's Entity Framework driver. I have an entity defined for a view as follows:
CREATE OR REPLACE FORCE VIEW "PHASE_TWO"."EDIPRODUCT" ("ID", "STK_NUM", "TITLE", "ISBN", "UPC", "ITEMNO", "LONGFORMAT", "ABRIDGED", "WEB_TITLES_ID", "OCLC", "GENRE", "RELYEAR", "ORIG_REL", "LANG", "ORIG_STKNUM", "PUBLISHER", "PEOPLELIST", "SALES_ORG", "NOT_AVAIL") AS
SELECT sap_product.id,
sap_product.stk_num,
sap_product.longdesc AS title,
sap_product.isbn,
sap_product.upc,
sap_product.itemno,
sap_product.longformat,
sap_product.abridged,
mwt_product.web_titles_id,
mwt_product.oclc,
mwt_product.genre,
mwt_product.RELYEAR,
sap_product.orig_rel,
sap_product.lang,
sap_product.orig_stknum,
UPPER (publisher.name) publisher,
(SELECT LISTAGG (p.FULLNAME, ', ') WITHIN GROUP (
ORDER BY pp.rank) AS People
FROM people p
JOIN product_people pp
ON p.id = pp.peopleid
WHERE pp.stk_num = sap_product.stk_num
GROUP BY pp.STK_NUM
) PeopleList,
sppg.PRICING_TYPE as sales_org,
sap_product.not_avail
FROM sap_product
JOIN mwt_product ON sap_product.stk_num = mwt_product.stk_num
JOIN publisher ON mwt_product.publisherid = publisher.id
JOIN SAP_PRODUCT_PRICING_GROUP sppg on sppg.STK_NUM = mwt_product.stk_num and sppg.MARKED_FOR_DELETION = 0
WHERE mwt_product.WEB_PRODUCTS_ID > 0;
This view works as expected in SQL Developer. My getEDIPRODUCT function (yes, it's VB.NET) in my controller is as follows:
' GET: odata/EDIPRODUCTs
<EnableQuery>
Function GetEDIPRODUCT() As IQueryable(Of EDIPRODUCT)
Dim results As IQueryable
results = db.EDIPRODUCT
For Each _product In results
Console.Write(_product)
Next
Return results
End Function
I just added the for loop in order to inspect the results. What I see when I inspect the results is the same product record is returned for each row. The value for the ID is duplicate and the only other field that should have variant values (sppg.PRICING_TYPE as sales_org) also just repeats.
I have other views where this does not occur. The correct number of records are always returned, but the first record retrieved is always just repeated in each row of the result set. Any idea what could be going on here?
I never actually resolved this issue and am still interested in why this fails, but I rewrote the portion of the app that uses this view to use OData's $expand to retrieve the related data.
I am trying to build a Query in MS Access that returns the last date/time for a given entity ID. Research shows that using the MAX() function on the corresponding field and using GROUP BY on the remaining fields appears to be the way to go.
However, this doesn't seem to work in the presence of values that hold 0 hours, 0 minutes and 0 seconds, as it shows those values as well. The query's SQL is as follows:
SELECT Int(Historico_Classificacoes.ID_Entidade) AS ID_Entidade, Max(Historico_Classificacoes.Timestamp_Classificacao) AS [Data da última classificação], Historico_Classificacoes.US_Indicia_Pais_Constituicao, Historico_Classificacoes.US_Indicia_Responsabilidades_Fiscais, Historico_Classificacoes.US_Indicia_Morada_Coletiva, Historico_Classificacoes.US_Indicia_Telefone, Historico_Classificacoes.US_Indicia_Proveniencia_Capital, Historico_Classificacoes.US_Indicia_Beneficiários, Historico_Classificacoes.US_Indicia_Naturalidade, Historico_Classificacoes.US_Indicia_Nacionalidade, Historico_Classificacoes.US_Indicia_Morada_Singular, Historico_Classificacoes.US_Indicia_Laboral
FROM Historico_Classificacoes
GROUP BY Int(Historico_Classificacoes.ID_Entidade), Historico_Classificacoes.US_Indicia_Pais_Constituicao, Historico_Classificacoes.US_Indicia_Responsabilidades_Fiscais, Historico_Classificacoes.US_Indicia_Morada_Coletiva, Historico_Classificacoes.US_Indicia_Telefone, Historico_Classificacoes.US_Indicia_Proveniencia_Capital, Historico_Classificacoes.US_Indicia_Beneficiários, Historico_Classificacoes.US_Indicia_Naturalidade, Historico_Classificacoes.US_Indicia_Nacionalidade, Historico_Classificacoes.US_Indicia_Morada_Singular, Historico_Classificacoes.US_Indicia_Laboral
ORDER BY Int(Historico_Classificacoes.ID_Entidade);
The Historico_Classificacoes table currently holds the following data:
"ID_Entidade";"Timestamp_Classificacao";"Classificacao_DMIF";"Notacao_Risco_BCFT";"US_Indicia_Pais_Constituicao";"US_Indicia_Responsabilidades_Fiscais";"US_Indicia_Morada_Coletiva";"US_Indicia_Telefone";"US_Indicia_Proveniencia_Capital";"US_Indicia_Beneficiários";"US_Indicia_Naturalidade";"US_Indicia_Nacionalidade";"US_Indicia_Morada_Singular";"US_Indicia_Laboral"
"62";20/9/2015 00:00:00;1;30;1;1;1;1;1;1;1;1;1;0
"62";28/9/2015 10:43:38;1;30;1;1;1;1;1;1;1;1;1;1
"62";29/9/2015 17:52:24;1;30;1;1;1;1;1;1;1;1;1;1
"62";29/9/2015 17:52:40;1;30;1;1;1;1;1;1;1;1;1;1
"98";20/9/2015 00:00:00;2;15;1;1;1;1;1;1;0;0;0;0
"98";20/9/2015 00:00:01;0;0;0;0;0;0;0;0;0;0;0;0
The query, when executed in Datasheet View, outputs the following:
"ID_Entidade";"Data da última classificação";"US_Indicia_Pais_Constituicao";"US_Indicia_Responsabilidades_Fiscais";"US_Indicia_Morada_Coletiva";"US_Indicia_Telefone";"US_Indicia_Proveniencia_Capital";"US_Indicia_Beneficiários";"US_Indicia_Naturalidade";"US_Indicia_Nacionalidade";"US_Indicia_Morada_Singular";"US_Indicia_Laboral"
62;29/9/2015 17:52:40;1;1;1;1;1;1;1;1;1;1
62;20/9/2015 00:00:00;1;1;1;1;1;1;1;1;1;0
98;20/9/2015 00:00:00;1;1;1;1;1;1;0;0;0;0
98;20/9/2015 00:00:01;0;0;0;0;0;0;0;0;0;0
There are duplicated records for entities 62 and 98, when only one record for each was expected. Am I missing something here? Why are the entries whose values hold 00:00:00 present?
You may want to consider using an additional query as an intermediate step that identifies the MAX Date/Time combination for each group ID first, then a follow up query that pulls the entire record where that Group ID, Date and Time match, this will ensure you won't have to use First or Min on the rest of your fields, and you will always get the correct data
You use Group By for the last fields like US_Indicia_Morada_Singular and US_Indicia_Laboral. You'll have to use First, Last, Min, or Max on these as well.
Here is your attempt (without the repeated alias)
SELECT INT(ID_Entidade) AS ID_Entidade
, MAX(Timestamp_Classificacao) AS [Data da última classificação]
, US_Indicia_Pais_Constituicao
, US_Indicia_Responsabilidades_Fiscais
, US_Indicia_Morada_Coletiva
, US_Indicia_Telefone
, US_Indicia_Proveniencia_Capital
, US_Indicia_Beneficiários
, US_Indicia_Naturalidade
, US_Indicia_Nacionalidade
, US_Indicia_Morada_Singular
, US_Indicia_Laboral
FROM Historico_Classificacoes
GROUP BY INT(ID_Entidade)
, US_Indicia_Pais_Constituicao
, US_Indicia_Responsabilidades_Fiscais
, US_Indicia_Morada_Coletiva
, US_Indicia_Telefone
, US_Indicia_Proveniencia_Capital
, US_Indicia_Beneficiários
, US_Indicia_Naturalidade
, US_Indicia_Nacionalidade
, US_Indicia_Morada_Singular
, US_Indicia_Laboral
ORDER BY INT(ID_Entidade);
From you comments, here is SQL that is close to what you need. I have added the field "AnotherField" for you as you may or may not need to add field here.
This currently selects the whole record from the table, but only the single "most recent" record for each value found in the AnotherField is listed.
It may be that you need more that one field where AnotherField appears in the SQL. Think of the field you use instead of AnotherField as being the fields that need to be used to find the maximum date record.
SELECT Main.*
FROM Historico_Classificacoes AS Main
INNER JOIN ( SELECT AnotherField
, MAX(Timestamp_Classificacao) AS [MaxDate]
FROM Historico_Classificacoes
GROUP BY AnotherField
)
AS MostRecent
ON ( Main.AnotherField = MostRecent.AnotherField
AND
Main.Timestamp_Classificacao = MostRecent.MaxDate
)