once i run first query i got the below result:
REQUEST_NO R
---------- -
4309300 A
4300983 C
and i want to compare if R column is different to "C" run second query and do the same for each element that i can have in REQUEST_NO column different to C
SELECT REQUEST_NO
, REQUEST_STS
FROM PORT_REQUEST
WHERE REQUEST_NO IN (SELECT DISTINCT REQUEST_NO
FROM SUB_PORT_REQUEST
WHERE SUBSCRIBER_NO = replace(replace('&CTN','-',''),' ',''));
Enter value for ctn: 5161890110
REQUEST_NO R
---------- -
4309300 A
4300983 C
SELECT ACT_SEQ_NO
FROM SUB_PORT_REQUEST
WHERE REQUEST_NO=&Req_No
AND ROWNUM <=1
ORDER BY ACT_SEQ_NO DESC;
Enter value for req_no: 4309300
ACT_SEQ_NO
----------
91180671
I expect to save in a array or something all values and can be able to iterate on it, can someone help?
One option, if you want to remain in SQL*Plus, is to create a (global temporary?) table, store result of the first query into it, and then rewrite the second query to use those results as
where request_no in (select request_no from my_temporary_table)
Another is to switch to PL/SQL and write a procedure which will accept CTN as a parameter. It (PL/SQL) allows you to use different ways to store results of the first query - into a table (as previously) or an array.
You can combine these to just 1 query by joining the tables. I am not sure I know how to handle the segment "and rownum<=1 Order by ...". Either the order by clause is not needed as rownum<=1 will produce at most 1 row and no matter how you sort it 1 row always comes out the same. Or you expect multiple rows want only want the greatest act_seq_no. If that is the case you need the order by in a sub-query and the rownum predicate on the outer. Assuming the latter we get:
Also assuming the column you refer to as R in description is actually the column port_request.request_sts as R is NOT selected nor is it an alias for any referenced column given.
select act_seq_no
from ( select spr.act_seq_no
from sub_port_request spr
join port_request pr
on (spr.request_no = pr.request_no and
pr.request_sts != 'C'
)
where spr.subscriber_no = replace(replace('&CTN','-',''),' ','')
order by spr.act_seq_no desc
)
where rownum<=1;
Related
I have a processknowledgeentry table that has the following data:
pke_id prc_id knw_id
1 1 2
2 1 4
3 2 4
The column knw_id references another table called knowledge, which also has its own id column. I want to be able to select all knw_id values with the same prc_id, and have them retain its nature as an id (so that it remains referenceable to the knowledge table).
Desired result:
prc_id knw_ids
1 [2, 4]
My code is shown below. (It also selects a Process Name from another table called process by inner joining the prc_ids. That part works correctly at least.)
SELECT * FROM (
SELECT
p.prc_name,
(SELECT knw_id
FROM processknowledgeentry
GROUP BY knw_id
HAVING COUNT(*) > 1)
FROM processknowledgeentry pke
INNER JOIN process p
ON pke.prc_id=p.prc_id
WHERE pke.prc_id = %s) as temp
I get the error: "CardinalityViolation: more than one row returned by a subquery used as an expression", and I understand why the error exists, so I want to know how to work around it. I'm also not sure if my logic is correct.
Would appreciate any assistance, thank you!
Seems you need a STRING_AGG() function instead of GROUP_CONCAT(), which some other DBMS has, containing a string type parameter as the first argument along with HAVING clause which filters multiple prc_id values such as
SELECT p.prc_id, STRING_AGG(knw_id::TEXT,',') AS knw_ids
FROM processknowledgeentry pke
JOIN process p
ON pke.prc_id = p.prc_id
-- WHERE pke.prc_id = %s
GROUP BY p.prc_id
HAVING COUNT(pke.prc_id) > 1
Indeed this case, a WHERE clause won't be needed.
Demo
I have 1 table where is 2 columns that i need to use at this moment( length and length_to_fault). If length has a null(N/A) value then i need to select value from length_to_fault and opposite.
I also need to sort everything and i can do it with 1 column like this:
select d.* from (select d.*, lead(length::float) over (partition by port_nbr, pair order by add_date) as next_length from diags d where length != 'N/A') d
this select sorts everything except length_to_fault. If 1 record has value in length_to_fault , it will be ignored and it wont show up.
Is there any suggestions?
Maybe its possible to just make these 2 columns into 1? It sounds much logical. But how?
I changed it to select d.* from (select d.*, lead(sum(length::float + length_to_fault::float)) over (partition by port_nbr, pair order by d.add_date) as next_length from diags d)d
i get error : column "d.ip" must appear in the group by clause or be used in an aggregate function.
I dont need to use ip column... I even dont know where to put that ip right now
I need to figure out how to eliminate older revisions from my query's results, my database stores orders as 'Q000000' and revisions have an appended '-number'. My query currently is as follows:
SELECT DISTINCT Estimate.EstimateNo
FROM Estimate
INNER JOIN EstimateDetails ON EstimateDetails.EstimateID = Estimate.EstimateID
INNER JOIN EstimateDoorList ON EstimateDoorList.ItemSpecID = EstimateDetails.ItemSpecID
WHERE (Estimate.SalesRepID = '67' OR Estimate.SalesRepID = '61') AND Estimate.EntryDate >= '2017-01-01 00:00:00.000' AND EstimateDoorList.SlabSpecies LIKE '%MDF%'
ORDER BY Estimate.EstimateNo
So for instance, the results would include:
Q120455-10
Q120445-11
Q121675-2
Q122361-1
Q123456
Q123456-1
From this, I need to eliminate 'Q120455-10' because of the presence of '-11' for that order, and 'Q123456' because of the presence of the '-1' revision. I'm struggling greatly with figuring out how to do this, my immediate thought was to use case statements but I'm not sure what is the best way to implement them and how to filter. Thank you in advance, let me know if any more information is needed.
First you have to parse your EstimateNo column into sequence number and revision number using CHARINDEX and SUBSTRING (or STRING_SPLIT in newer versions) and CAST/CONVERT the revision to a numeric type
SELECT
SUBSTRING(Estimate.EstimateNo,0,CHARINDEX('-',Estimate.EstimateNo)) as [EstimateNo],
CAST(SUBSTRING(Estimate.EstimateNo,CHARINDEX('-',Estimate.EstimateNo)+1, LEN(Estimate.EstimateNo)-CHARINDEX('-',Estimate.EstimateNo)+1) as INT) as [EstimateRevision]
FROM
...
You can then use
APPLY - to select TOP 1 row that matches the EstimateNo or
Window function such as ROW_NUMBER to select only records with row number of 1
For example, using a ROW_NUMBER would look something like below:
SELECT
ROW_NUMBER() OVER(PARTITION BY EstimateNo ORDER BY EstimateRevision DESC) AS "LastRevisionForEstimate",
-- rest of the needed columns
FROM
(
-- query above goes here
)
You can then wrap the query above in a simple select with a where predicate filtering out a specific value of LastRevisionForEstimate, for instance
SELECT --needed columns
FROM -- result set above
WHERE LastRevisionForEstimate = 1
Please note that this is to a certain extent, pseudocode, as I do not have your schema and cannot test the query
If you dislike the nested selects, check out the Common Table Expressions
Let's say I have a table format that looks exactly like this:
I'd like to write a query that locates the maximum station for a given frame and output case (results are grouped by frame & output case) but also return the ordered P (& eventually V2, V3, T, M2 & M3) that would be associated with the maximum station. The desired query is shown below:
I can't for the life of me figure this out. I've posted a copy of the access database to my google drive: https://drive.google.com/folderview?id=0B9VpkDoFQISJOFcwS2RMSGJ5RVk&usp=sharing
select x.*, t.p
from (select frame, outputcase, max(station) as max_station
from tbl
group by frame, outputcase) x
inner join tbl t
on x.frame = t.frame
and x.outputcase = t.outputcase
and x.max_station = t.station
order by x.frame, x.outputcase;
Just as a note to avoid confusion, w/ that second column, t is the table alias, p is the column name.
The subquery, which I've assigned an alias of x, finds the max(station) for each unique combination of (frame, outputcase). That is what you want, but the problem does not stop there, you also want column p. The reason that couldn't be selected in the same query is because you would have had to group by it, and you don't want the max(station) for each combination of (frame, outputcase, p). You want the max(station) for each combination of (frame, outputcase).
Because we couldn't get column p in that first step, we have to join back to the original table using the value we obtained (which I've assigned an alias, max_station), and the obvious join conditions of frame and outputcase. So we join back to the original table on those 3 things, 2 of which are fields on the actual table, one of which was calculated in the subquery (max_station).
Because we've joined back to the original table, we can then select column p from the original table.
Takes a bit to return the query, but the result below provides the desired result:
SELECT t1.*
FROM [Element Forces - Frames] as t1
WHERE t1.Station In (SELECT TOP 1 t2.Station
FROM [Element Forces - Frames] as t2
WHERE t2.Frame = t1.Frame
ORDER BY t2.Station DESC)
ORDER BY t1.Frame ASC, t1.OutputCase ASC;
I still want to thank everyone who posted answers. I'm sure it's just syntax errors on my part that I was struggling with.
I have table with 3 columns A B C.
I want to select * from this table, but ordered by a specific ordering of column A.
In other words, lets' say column A contains "stack", "over", "flow".
I want to select * from this table, and order by column A in this specific ordering: "stack", "flow", "over" - which is neither ascending nor descending.
Is it possible?
You can use a CASE statement in the ORDER BY clause. For example ...
SELECT *
FROM Table
ORDER BY
CASE A
WHEN 'stack' THEN 1
WHEN 'over' THEN 2
WHEN 'flow' THEN 3
ELSE NULL
END
Check out Defining a Custom Sort Order for more details.
A couple of solutions:
Create another table with your sort order, join on Column A to the new table (which would be something like TERM as STRING, SORTORDER as INT). Because things always change, this avoids hard coding anything and is the solution I would recommend for real world use.
If you don't want the flexibility of adding new terms and orders, just use a CASE statement to transform each term into an number:
CASE A WHEN 'stack' THEN 1 WHEN 'over' THEN 2 WHEN 'flow' THEN 3 END
and use it in your ORDER BY.
If you have alot of elements with custom ordering, you could add those elements to a table and give them a value. Join with the table and each column can have a custom order value.
select
main.a,
main.b,
main.c
from dbo.tblMain main
left join tblOrder rank on rank.a = main.a
order by rank.OrderValue
If you have only 3 elements as suggested in your question, you could use a case in the order by...
select
*
from dbo.tblMain
order by case
when a='stack' then 1
when a='flow' then 2
when a='over' then 3
else 4
end