I'm trying to add where condition to my select statement but I'm getting invalid column name exception.
SELECT "Ugly OLAP name" as "Value"
FROM OpenQuery( OLAP, 'OLAP Query')
But if I try to add:
WHERE "Value" > 0
you suggested that I have to use the original name and it works fine.
But what if I can't use the original column name as follow
SELECT
ROW_NUMBER() OVER(PARTITION BY P.ProviderID
ORDER BY T.PostedUTC DESC, T.TransactionID DESC) as RN
FROM
Provider p
INNER JOIN
Transaction T
WHERE
RN = 1
How can I access RN at my where ???
You need to use a CTE or a derived table:
SELECT *
FROM ( SELECT ROW_NUMBER() OVER(PARTITION BY P.ProviderID
ORDER BY T.PostedUTC DESC, T.TransactionID DESC) as RN,
[More Columns]
FROM Provider p
INNER JOIN Transaction T
ON SomeCondition) DT
where DT.RN = 1
Or
;WITH CTE AS
(
SELECT ROW_NUMBER() OVER(PARTITION BY P.ProviderID
ORDER BY T.PostedUTC DESC, T.TransactionID DESC) as RN,
[More Columns]
FROM Provider p
INNER JOIN Transaction T
ON SomeCondition
)
SELECT *
FROM CTE
where RN = 1
You could do it this way:
WITH T AS (
SELECT ROW_NUMBER() OVER(PARTITION BY P.ProviderID ORDER BY T.PostedUTC DESC, T.TransactionID DESC) as RN
From Provider p Inner join Transaction T
)
SELECT RN
FROM T
WHERE RN > 0;
EDIT: Missed second query in the question...
you must repeat the original calculation
Another way to make this easier to understand is to rewrite your query as a series of CTE's - Common Table Expressions. They look and act like 'mini local views' where you can rename columns, etc. It's tough from the example you gave but often you can rewrite complex queries and return to columns with nicer names in subsequent queries.
Related
Output of my SQL Server Query is as below:
Following is my query:
SELECT
si.SupplyInvoiceID,
si.CompanyID,
si.TotalBill,
siph.BillPaidAmount,
si.TotalBill - SUM(siph.BillPaidAmount)
over( partition by si.SupplyInvoiceID order by siph.SupplyPaymentID asc) as RemainingBillAmount
from
SupplyInvoicePaymentHistory siph
left join
SupplyInvoice si
on siph.SupplyInvoiceID = si.SupplyInvoiceID
I want that in output column TotaBill, bill amount should be shown only one for each SupplyInvoiceID i.e
Required Output
Your problem requires an ordering for the table. It appears to be by SupplyPaymentId (although any column can be used). To do what you want, you can use row_number() and an explicit order by in the query:
select si.SupplyInvoiceID, si.CompanyID,
(CASE WHEN ROW_NUMBER() OVER (PARTITION BY si.SupplyInvoiceID order by siph.SupplyPaymentID) = 1
THEN si.TotalBill
END) as TotalBill
siph.BillPaidAmount,
(si.TotalBill -
SUM(siph.BillPaidAmount) over (partition by si.SupplyInvoiceID order by siph.SupplyPaymentID asc)
) as RemainingBillAmount
from SupplyInvoicePaymentHistory siph left join
SupplyInvoice si
on siph.SupplyInvoiceID = si.SupplyInvoiceID
order by si.SupplyInvoiceID, siph.SupplyPaymentID
This query gives me invalid identifier error, and i know it is because subquery will only be able to access data that is one layer higher.
select *
from t2_callerid_plan cp
where cp.subsrefnum in (
select *
from (
select vsap.subsrefnum
from prv_internet_responses_vsap vsap
where vsap.subsrefnum = cp.subsrefnum
order by vsap.id desc
)
where rownum = 1
);
Now, i was wandering if there is way i can create query that would be able to return only the newest row while using the data from query in subquery?
You can use ROW_NUMBER() :
SELECT * FROM (
SELECT cp.*,
ROW_NUMBER() OVER(PARTITION BY cp.subsrefnum ORDER BY vsap.id desc) as rnk
from t2_callerid_plan cp
JOIN prv_internet_responses_vsap vsap
ON vsap.subsrefnum = cp.subsrefnum) p
WHERE p.rnk = 1
you can try this:
select *
from t2_callerid_plan cp
inner join
(
select vsap.subsrefnum,ROW_NUMBER() OVER (PARTITION BY subsrefnum ORDER BY vsap.id desc) rn
from prv_internet_responses_vsap vsap
)vsap
on vsap.subsrefnum = cp.subsrefnum and vsap.rn=1
I have query with duplicates. And now I need to build query without duplicates. I'm trying to do it, but my query need long time. My query with duplicates:
SELECT
c.*
FROM
Clients c
INNER JOIN
(
SELECT
iin,
COUNT(iin) AS countIIN
FROM
Clients
GROUP BY
iin
HAVING
COUNT(iin) > 1
) cc
ON c.IIN = cc.IIN
ORDER BY
c.last_name DESC
I need above anti-query.
You can use below query to find only unique record.
WITH CTE AS
(SELECT *, COUNT(IIN) OVER (PARTITION BY IIN) RECORDCOUNT FROM CLIENTS)
SELECT * FROM CTE WHERE RECORDCOUNT =1
make sure * should be replace in query with required column.
Also if you want to fetch unique record from duplicate list as well then you can choose below query
WITH CTE AS
(SELECT *, RECORD_NUMBER() OVER (PARTITION BY IIN ORDER BY IIN) RECORDCOUNT FROM CLIENTS)
SELECT * FROM CTE WHERE RECORDCOUNT =1
To find duplicates in SQL Row_Number() function is best option,
Please check following query
WITH [CTE NoDuplicates] AS
(
SELECT
RN = ROW_NUMBER() OVER (PARTITION BY iin ORDER BY c.last_name DESC),
*
FROM Clients
)
DELETE FROM [CTE DUPLICATE] WHERE RN = 1
Hi I have two tables A and B
Table A:
Order Pick up
100 Toronto
100 Mississauga
100 Scarborough
Table B
Order Drop off
100 Oakvile
100 Hamilton
100 Milton
Please let me know how can I can get this output (ie I just want to join the fields from in B in right hand side of A)
Order pickup Dropoff
100 Toronto oakvile
100 Mississauga Hamilton
100 Scarborough Milton
How can I write query for the same I try to join a.rownum = b.rownum but no luck.
As OP has not mention any RDBMS
I am taking the liberty for taking SQL SERVER 2008 as his RDBMS. If OP wants the following Query can be converted to any other RDBMS easily.
select A.[Order],
ROW_NUMBER() OVER(ORDER BY A.[Pick up]) rn1,
A.[Pick up]
into A1
FROM A
;
select B.[Order],
ROW_NUMBER() OVER(ORDER BY B.[Drop off]) rn2,
B.[Drop off]
into B1
FROM B
;
Select A1.[Order],
A1.[Pick up],
B1.[Drop off]
FROM A1
INNER JOIN B1 on A1.rn1=B1.rn2
SQL FIDDLE to Test
From the use rownum, I'm presuming that you are using Oracle. You can attempt the following:
select a.Order as "order", a.Pickup, b.DropOff
from (select a.*, rownum as seqnum
from a
) a join
(select b.*, rownum as seqnum
from b
) b
on a.order = b.order and a.seqnum = b.seqnum;
(This assumes that all orders match up exactly.)
I must emphasize that although this might seem to work (and it should work on small examples), it will not work in general. And, it will not work on data that has deleted records. And, it probably won't work on parallel systems. If you have a small amount of data, I'd suggest dumping it in Excel and doing the work there -- that way, you can see if the pairs make sense.
Also, if you do have a column that specifies the ordering, then basically the same structure will work:
select coalesce(a.Order, b.Order) as "order", a.Pickup, b.DropOff
from (select a.*,
row_number() over (partition by "order" order by <ordering field>) as seqnum
from a
) a join
(select b.*,
row_number() over (partition by "order" order by <ordering field>) as seqnum
from b
) b
on a.order = b.order and a.seqnum = b.seqnum;
I'd use a CTE along with the ROW_NUMBER windowing function.
WITH keyed_A AS (
SELECT
ROW_NUMBER() OVER (ORDER BY (SELECT NULL)) AS id
,[Order]
,[Pick Up]
FROM A
), keyed_B AS (
SELECT
ROW_NUMBER() OVER (ORDER BY (SELECT NULL)) AS id
,[Order]
,[Drop Off]
FROM B
)
SELECT
a.[Pick Up]
,b.[Drop Off]
FROM keyed_A AS a
INNER JOIN keyed_B AS b
ON a.id = b.id
;
The CTE can be thought of as a virtual table with an id that crosses the two tables. The OVER clause with the Windowing function ROW_NUMBER can be used to create an id in the CTE. Since we are relying on the physical storage of the records (not a good idea, please add keys to the tables) we can ORDER BY (SELECT NULL) which means just use the order in will be read in.
SQLFiddle to test
SELECT
ROW_NUMBER()over(partition by tblProductTemplateHdr.product_ID
order by tblProductTemplateHdr.product_ID, tblProcessSequence.sl_No) AS rno,
tblProductTemplateHdr.product_ID
,tblProductProcessHdr.process_ID
,tblProcessSequence.sl_No
FROM
Production.tblProcessSequence
INNER JOIN
Production.tblProductProcessHdr ON tblProductProcessHdr.product_Process_ID = tblProcessSequence.product_Process_ID AND tblProductProcessHdr.isQC_Need = 1
INNER JOIN
Production.tblProductTemplateHdr ON tblProductTemplateHdr.product_Temp_ID = tblProductProcessHdr.product_Temp_ID
I want the row with maximum sl_No in each product_Id without using a subquery, this the result obtained by running this query want to apply filtering on same query
You need to a) rewrite your query just a little, and b) I'd recommend using table aliases to make your query more readable.
Try this:
;WITH ProductData AS
(
SELECT
ROW_NUMBER() OVER (PARTITION BY pth.Product_ID
ORDER BY pth.Product_ID, ps.sl_No DESC) AS rno,
tph.product_ID,
tph.process_ID,
ps.sl_No
FROM
Production.tblProcessSequence ps
INNER JOIN
Production.tblProductProcessHdr pph ON tph.product_Process_ID = ps.product_Process_ID
AND pph.isQC_Need = 1
INNER JOIN
Production.tblProductTemplateHdr tph ON tph.product_Temp_ID = pph.product_Temp_ID
)
SELECT *
FROM
ProductData
WHERE
rno = 1
The ROW_NUMBER() function partitions your data by Product_ID and within each partition, it orders the rows by sl_No DESC - so the highest value of sl_No gets the rno = 1 value (all others get higher numbers, in each partition)
You can use another windowed function:
MAX(tblProcessSequence.sl_No) OVER(PARTITION BY tblProductTemplateHdr.product_ID)
ADDENDUM
Just to give the full query in context in case the above was not clear:
SELECT ROW_NUMBER() OVER (PARTITION BY tempHdr.Product_ID ORDER BY Seq.sl_No DESC) AS rno,
tempHdr.product_ID,
procHdr.process_ID,
Seq.sl_No,
MAX(Seq.sl_No) OVER(PARTITION BY tblProductTemplateHdr.Product_ID) AS Max_SL_No
FROM Production.tblProcessSequence Seq
INNER JOIN Production.tblProductProcessHdr procHdr
ON Seq.product_Process_ID = tblProductProcessHdr.product_Process_ID
AND procHdr.isQC_Need = 1
INNER JOIN Production.tblProductTemplateHdr tempHdr
ON tempHdr.product_Temp_ID = procHdr.product_Temp_ID