I have three tables and want a join where only 1 row per priority shows.
table Role (AgreementId int, CustomerId int, AgreementRoleId int);
table AgreementRoleGroup (RoleGroupId int, AgreementRoleId int);
table RoleGroup (RoleGroupid int, priority int)
Current query gives all rows
select * from role r
left join agreementRoleGroup as arg on r.agreementRoleId = arg.agreementRoleId
I made a db fiddle, where I want the result to be two rows, the first and one of the two next.
https://dbfiddle.uk/?rdbms=sqlserver_2019&fiddle=fea96bb551657bfcce18f9af7f3f2947
Your criteria for which row isn't defined, but I assume you want the unique set of AgreementID, CustomerID and RoleGroupID, in which case use:
select distinct r.AgreementID, r.CustomerID, arg.RoleGroupID
from role r
inner join agreementRoleGroup as arg on r.agreementRoleId = arg.agreementRoleId
You can use analytical function ROW_NUMBER as follows:
select * from
(select r.*, arg.RoleGroupId,
row_number() over (partition by rg.priority order by r.AgreementId) as rn
from role r
join agreementRoleGroup as arg on r.agreementRoleId = arg.agreementRoleId
join rolegroup rg on rg.RoleGroupid = arg.RoleGroupId) t
where rn = 1
db<>fiddle
Related
Assume I have those tables:
CREATE TABLE Employee (ID int, EmployeeIdentifier varchar(100),ManagerIdentifier varchar(100))
CREATE TABLE EmployeeManager (ID int, EmployeeID varchar(100))
INSERT Employee
VALUES
(1,'apple','apple'),
(2,'banana','apple'),
(3,'citrus','apple'),
(4,'grape','grape'),
(5,'grape','grape'),
(6,'grape','grape')
INSERT EmployeeManager
VALUES
(1,1),
(2,1),
(3,1),
(4,4),
(5,5),
(6,5)
For Employee.ID IN (1,2,3), records in EmployeeManager look fine.
But in Employee.ID IN (4,5,6) we can see many duplicates. We are not allowed to delete any records from Employee table. But we are free to assign EmpoyeeManager.EmployeeID value. Since there is only one Actual record for Grape and the rest is duplicate, I want to assign EmpoyeeManager.EmployeeID to a minimum value Employee.ID from all duplicated grape records in Employee table, aka to 4.
I have this query,
UPDATE d SET EmployeeID = l.ID
FROM dbo.EmployeeManager d
INNER JOIN Employee s on d.ID=s.ID
OUTER APPLY (
SELECT ID
FROM Employee l
WHERE s.ManagerIdentifier=l.EmployeeIdentifier
) l
WHERE
EXISTS (
SELECT d.EmployeeID
EXCEPT
SELECT l.ID
)
If you keep running it you will see that EmployeeManager.EmployeeID values for ID (4,5,6) will keep changing.
How I can I update above update statement to assign to the lowest value of Employee.ID for all EmployeeManager.ID (4,5,6), aka to 4?
We are not allowed to run one time fix script, because corrupted data to above table can keep coming.
Desired output after running above update statement should be
You need TOP (1) and ORDER BY in the subquery to pick out a specific row
UPDATE d SET EmployeeID = l.ID
FROM dbo.EmployeeManager d
INNER JOIN Employee s on d.ID=s.ID
OUTER APPLY (
SELECT TOP (1) ID
FROM Employee l
WHERE s.ManagerIdentifier = l.EmployeeIdentifier
ORDER BY ID
) l
WHERE
EXISTS (
SELECT d.EmployeeID
EXCEPT
SELECT l.ID
)
You appear to have a normalization issue, as the Manager is defined in two places
I suggest you use better aliases for your tables, they are not very memorable
You can change your OUTER to CROSS, and then you can use a standard <> instead of the EXISTS/EXCEPT
CROSS APPLY (
SELECT TOP (1) ID
FROM Employee l
WHERE s.ManagerIdentifier = l.EmployeeIdentifier
ORDER BY ID
) l
WHERE d.EmployeeID <> l.ID
I have a table with a list of Client No's, ID etc & there are many Clients with different ID's. I need to pull out the MAX ID No. for each Client, e.g.
ClientNo: 1500 has 3 ID's - the maximum in the ID field is the one I need!
UPDATE: This works:
SELECT MP.ClientID, MP.SequenceID
FROM TABLENAME MP
INNER JOIN (
SELECT ClientID, MAX(SequenceID) SequenceID
FROM TABLENAME
GROUP BY ClientID
) b on MP.ClientID = b.ClientID AND MP.SequenceID = b.SequenceID
BUT....
I need to link the table to many others to pull in other data, where do I insert the left joins to these tables please?
I am assuming you have multiple same client (numbers) with different IDs and for each client (number) you have to get the maximum ID. You may do the following:
select client_number, max(ID) from client group by client_number;
Depending on your need tweak this query.
You may want to do this:
SELECT MP.ClientID, b.DesiredValue
FROM TABLENAME MP
INNER JOIN (
SELECT ClientID, DesiredValue, ROW_NUMBER () OVER (PARTITION BY ClientID order by SequenceID desc) As RecentRN
FROM TABLENAME
) b
on MP.ClientID = b.ClientID AND b.RecentRN = 1
or
SELECT MP.ClientID, b.DesiredValue
FROM TABLENAME MP
INNER JOIN (
SELECT ClientID, DesiredValue,ROW_NUMBER () OVER (PARTITION BY ClientID order by SequenceID desc) As RecentRN
FROM TABLENAME
) b
on MP.ClientID = b.ClientID
Where b.RecentRN = 1
I have 2 tables: Users and Results.
The usertable contains duplicate data which is reflected in the results table. The user below is created 3 times. I need to update the results table where UserId 2 and 3 to 1 so that all the results can be viewed on this user only.
This is easy if I have only have a few users and a few results for them, but in my case I have 500 duplicated users and 30000 results.
I am using SQL Server Express 2014
I will really appreciate any help with this!
Edit: misstyped column names in resultTable. Im sorry if you got confused by it.
UserTable
UserId---Fname---LName
1-----Georg-----Smith
2-----Georg-----Smith
3-----Georg-----Smith
ResultsTable
ResultId---UserRefId
1-----1
2-----2
3-----3
4-----1
I have manage to select duplicates from usertable, but i don't know how to proceed further.
;WITH T AS
(
SELECT *, COUNT(*) OVER (PARTITION BY Fname + Lname) as Cnt
FROM TestDatabase.Users
)
SELECT Id, Fname, Lname
FROM T
WHERE Cnt > 2
Your ResultTable has 2 columns with the same UserId name. I changed the second to UserId2 for the query below:
;WITH cte As
(
SELECT R.UserId, R.UserId2,
MIN(U.UserId) OVER (PARTITION BY U.FName, U.LName) As OriginalUserId
FROM ResultTable R
INNER JOIN UserTable U ON R.UserId = U.UserId
)
UPDATE cte
SET UserId2 = OriginalUserId
You are on the right track with the cte. The ROW_NUMBER() function can be used to flag duplicate UserIds, then you can join the cte into the from clause of your update statement to find the UserIds you want to replace, and join again to find the UserIds you want to replace them with.
;WITH cteDedup AS(
SELECT
UserId
,FName
,LName
,ROW_NUMBER() OVER(PARTITION BY FName, LName ORDER BY UserID ASC) AS row_num
FROM UserTable
)
UPDATE rt
SET UserId = original.UserId
FROM ResultsTable rt
JOIN cteDedup dupe
ON rt.UserId = dupe.UserId
JOIN cteDedup original
ON dupe.FName = original.FName
AND dupe.LName = original.LName
WHERE dupe.row_num <> 1
AND original.row_num = 1
See the SQLFiddle
A little tricky query looks like this:
;with t as (
select fname+lname name,id,
ROW_NUMBER() over(partition by fname+lname order by id) rn
from #users
)
--for test purpose comment next 2 lines
update #results
set userid=t1.id
--and uncomment the next one
--select t.name,t.id,userid,res,t1.id id1--,(select top 1 id from t t1 where t1.name=t.name and t.rn=1) id1
from t
inner join #results r on t.id=r.userid
inner join t t1 on t.name=t1.name and t1.rn=1
And then you can delete duplicate users
;with t as (
select name,id,
ROW_NUMBER() over(partition by name order by id) rn
from #users
)
delete t where rn>1
i have two tables:
create table saller(
id_saller int IDENTITY PRIMARY KEY,
name varchar(50),
branch varchar(10)
);
create table sale(
id_sale int IDENTITY PRIMARY KEY,
amount float,
id_saller int,
CONSTRAINT fk_saller FOREIGN KEY (id_saller)REFERENCES saller(id_saller)
);
i wanna get the biggest selling value of the amount for each branch
and get the name and id of the saller in charge for the biggest selling
i tried this:
SELECT saller.name, saller.id_saller,maxv.branch, maxv.maxbranch
FROM saller
INNER JOIN sale
ON saller.id_saller = sale.id_saller
INNER JOIN (
SELECT saller.branch,saller.id_saller,MAX(sale.amount) AS maxbranch
FROM saller
INNER JOIN sale
ON saller.id_saller = sale.id_saller
GROUP BY saller.branch,saller.id_saller
) AS maxv ON(sale.id_saller = maxv.id_saller)
One way to do it if you want to return exactly one row per branch even if you have ties
SELECT branch, id_saller, name, amount
FROM
(
SELECT r.branch, s.id_saller, r.name, s.amount,
ROW_NUMBER() OVER (PARTITION BY r.branch ORDER BY s.amount DESC) rnum
FROM sale s JOIN saller r
ON s.id_saller = r.id_saller
) q
WHERE q.rnum = 1
or if you want the highest value with ties
SELECT branch, id_saller, name, amount
FROM
(
SELECT r.branch, s.id_saller, r.name, s.amount,
RANK() OVER (PARTITION BY r.branch ORDER BY s.amount DESC) rank
FROM sale s JOIN saller r
ON s.id_saller = r.id_saller
) q
WHERE q.rank = 1
Here is SQLFiddle demo
According to your question, I don't understand the presence of branch, maybe a table that has not been mentionned. But to retrieve the seller id and name, you can try this;
SELECT saller.name, saller.id_saller
FROM saller
INNER JOIN sale
ON saller.id_saller = sale.id_saller
WHERE sale.Amount = (Select Max(Amount) from sale)
I have 4 tables with the following structure:
Table artist:
artistID lastname firstname nationality dateofbirth datedcease
Table work:
workId title copy medium description artist ID
Table Trans:
TransactionID Date Acquired Acquistionprice datesold askingprice salesprice customerID workID
Table Customer:
customerID lastname Firstname street city state zippostalcode country areacode phonenumber email
First question is which artist has the most works of artsold and how many of the artist works have been sold.
My SQL query is this:
SELECT * From dtoohey.artist A1
INNER JOIN
(
SELECT COUNT(W1.ArtistID) AS COUNTER, artistID FROM dtoohey.trans T1
INNER JOIN dtoohey.work W1
ON W1.workid = T1.Workid
GROUP BY W1.artistID
) TEMP1
ON TEMP1.artistID = A1.artistID
WHERE A1.artistID = TEMP1.artistId
ORDER BY COUNTER desc;
I am to get the whole table but I only want show only the first row which is the highest count how do I do that??
I have tried inserting WHERE ROWNUM <=1 but it shows artist ID with 1
qns 2 is sales of which artist's work have resulted in the highest average profit (i.e) the average of the profits made on each sale of worksby an artist), and what is that amount.
My SQL query is:
SELECT A1.artistid, A1.firstname FROM
(
SELECT
(salesPrice - AcquisitionPrice) as profit,
w1.artistid as ArtistID
FROM dtoohey.trans T1
INNER JOIN dtoohey.WORK W1
on W1.workid = T1.workid
) TEMP1
INNER JOIN dtoohey.artist A1
ON A1.artistID = TEMP1.artistID
GROUP BY A1.artistid
HAVING MAX(PROFIT) = AVG(PROFIT);
I'm not able to execute it
I have tried query below but still not able to get it keep getting the error missing right parenthesis
SELECT A1.artistid, A1.firstname, TEMP1.avgProfit
FROM
(
SELECT
AVG(salesPrice - AcquisitionPrice) as avgProfit,
W1.artistid as artistid
FROM dtoohey.trans T1
INNER JOIN dtoohey.WORK W1
ON W1.workid = T1.workid
GROUP BY artistid
ORDER BY avgProfit DESC
LIMIT 1
) TEMP1
INNER JOIN dtoohey.artist A1
ON A1.artisid = TEMP1.artistid
Sometimes ORA-00907: missing right parenthesis means exactly that: we have a left bracket without a matching right one. But it can also be thrown by a syntax error in a part of a statement bounded by parentheses.
It's that second cause here: LIMIT is a Mysql command which Oracle does not recognise. You can use an analytic function here:
SELECT A1.artistid, A1.firstname, TEMP1.avgProfit
FROM
(
select artistid
, avgProfit
, rank() over (order by avgProfit desc) as rnk
from (
SELECT
AVG(salesPrice - AcquisitionPrice) as avgProfit,
W1.artistid as artistid
FROM dtoohey.trans T1
INNER JOIN dtoohey.WORK W1
ON W1.workid = T1.workid
GROUP BY artistid
)
) TEMP1
INNER JOIN dtoohey.artist A1
ON A1.artisid = TEMP1.artistid
where TEMP1.rnk = 1
This uses the RANK() function which will return more than one row if several artists achieve the same average profit. You might want to use ROW_NUMBER() instead. Analytic functions can be very powerful. Find out more.
You can apply ROWN_NUMBER(), RANK() and DENSE_RANK() to any top-n problem. You can use one of them to solve your first problem too.
"however the avg profit is null."
That's probably a data issue. If one of the numbers in (salesPrice - AcquisitionPrice) is null the result will be null, and won't be included in the average. If all the rows for an artist are null the AVG() will be null.
As it happens the sort order will put NULL last. But as the PARTITION BY clause sorts by AvgProfit desc that puts the NULL results at rank 1. The solution is to use the NULLS LAST in the windowing clause:
, rank() over (order by avgProfit desc nulls last) as rnk
This will guarantee you a non-null result at the top (providing at least one of your artists has values in both columns).
1st question - Oracle does not guarantee the order by which rows are retrieved. Hence you must first order and then limit the ordered set.
SELECT * from (
SELECT A1.* From dtoohey.artist A1
INNER JOIN
(
SELECT COUNT(W1.ArtistID) AS COUNTER, artistID FROM dtoohey.trans T1
INNER JOIN dtoohey.work W1
ON W1.workid = T1.Workid
GROUP BY W1.artistID
) TEMP1
ON TEMP1.artistID = A1.artistID
WHERE A1.artistID = TEMP1.artistId
ORDER BY COUNTER desc
) WHERE ROWNUM = 1
2nd question: I believe (haven't tested) that you have that LIMIT 1 wrong. That keyword is for use with Bulk collecting.