Inconsistent Transpose - sql

Given a table A has the following data:
+----------+-------+
| Supplier | buyer |
+----------+-------+
| A | 1 |
| A | 2 |
| B | 3 |
| B | 4 |
| B | 5 |
+----------+-------+
My question is, can I transpose the second column so the resultant table will be like:
+----------+--------+--------+--------+
| Supplier | buyer1 | buyer2 | buyer3 |
+----------+--------+--------+--------+
| A | 1 | 2 | |
| B | 3 | 4 | 5 |
+----------+--------+--------+--------+
Assuming the maximum number of buyers is known as three.


You could use a common table expression to give each buyer an order within the supplier, and then just do a regular case to put them in columns;
WITH cte AS (
SELECT supplier, buyer,
ROW_NUMBER() OVER (PARTITION BY supplier ORDER BY buyer) rn
FROM Table1
)
SELECT supplier,
MAX(CASE WHEN rn=1 THEN buyer END) buyer1,
MAX(CASE WHEN rn=2 THEN buyer END) buyer2,
MAX(CASE WHEN rn=3 THEN buyer END) buyer3
FROM cte
GROUP BY supplier;
An SQLfiddle to test with.


You may consider using PIVOT clause:
select *
from (
select supplier, buyer, row_number() over (partition by supplier order by buyer) as seq
from a
)
pivot (max(buyer) for seq in (1 as buyer1, 2 as buyer2, 3 as buyer3));
SQLFiddle here.

Related

SQL Server : query grouping

I have some queries in SQL Server. I have two tables
keyword_text
Keyword_relate
Columns in keyword_text:
key_id
keywords
Columns in keyword_relate:
key_id
product_id
score
status
Sample data for keyword_text:
----|----------
1 | Pencil
2 | Pen
3 | Books
Sample data for keyword_relate:
----------------------------
Sno| Product | SCore|status
---------------------------
1 | 124 | 2 | 1
1 | 125 | 3 | 1
2 | 124 | 3 | 1
2 | 125 | 2 | 1
From this I want to get the product_id, grouped by keywords and which have maximum score

Presuming that key_id of first table is Sno in second table. You can use ROW_NUMBER:
WITH CTE AS
(
SELECT Product AS ProductID, Score As MaxScore,
RN = ROW_NUMBER() OVER (PARTITION BY kt.key_id ORDER BY Score DESC)
FROM keyword_text kt INNER JOIN keyword_relate kr
ON kt.key_id = kr.Sno
)
SELECT ProductID, MaxScore
FROM CTE
WHERE RN = 1

Sum across columns and rows

Consider a table like this
table
+--------+---------+-----------+---------+-----------+
| BookId | ItemId1 | Quantity1 | ItemId2 | Quantity2 |
+--------+---------+-----------+---------+-----------+
| 1 | 1 | 2 | 2 | 1 |
| 1 | 3 | 1 | 2 | 1 |
| 2 | 1 | 1 | 2 | 1 |
+--------+---------+-----------+---------+-----------+
Now I want to get the sum of columns quantity for each item grouped by book. How can I take the sum across different columns then? right now I use an awkward solution like building a temporary table and then querying this one, but it must be possible in a more elegant way!?
select
BookId 'BookId',
ItemId1 'ItemId',
Quantity1 'Quantity'
into #temptab
from table
union all
select
BookId,
ItemId2,
Quantity2
from table
and after that
select
BookId,
ItemId,
sum(Quantity)
from #temptab
group by ItemId, BookId
How can I get rid of this intermediate step?
Desired output:
+--------+--------+----------+
| BookId | ItemId | Quantity |
+--------+--------+----------+
| 1 | 1 | 2 |
| 1 | 3 | 1 |
| 1 | 2 | 2 |
| 2 | 1 | 1 |
| 2 | 2 | 1 |
+--------+--------+----------+

Use cross apply with table valued constructor to unpivot the data then find sum per bookid and item.
This will avoid your intermediate step
SELECT BookId,
item,
Sum(quantity)
FROM Youratble
CROSS apply (VALUES(Quantity1,ItemId1),
(Quantity2,ItemId2))cs(quantity, item)
GROUP BY BookId,
item
As mentioned by Mikael Eriksson for sql server 2005 use this
SELECT BookId,
item,
Sum(quantity)
FROM Youratble
cross apply
(select Quantity1, ItemId1
union all
select Quantity2, ItemId2) as cs(quantity, item)
GROUP BY BookId,
item

Based on what you've done, you can do it in one single step using subqueries:
select
combined.BookId,
combined.ItemId,
sum(combined.Quantity)
from
(select
BookId 'BookId',
ItemId1 'ItemId',
Quantity1 'Quantity'
from tableName
union all
select
BookId,
ItemId2,
Quantity2
from tableName) as combined
group by combined.ItemId, combined.BookId

Rolling up remaining rows into one called "Other"

I have written a query which selects lets say 10 rows for this example.
+-----------+------------+
| STORENAME | COMPLAINTS |
+-----------+------------+
| Store1 | 4 |
| Store7 | 2 |
| Store8 | 1 |
| Store9 | 1 |
| Store2 | 1 |
| Store3 | 1 |
| Store4 | 1 |
| Store5 | 0 |
| Store6 | 0 |
| Store10 | 0 |
+-----------+------------+
How would I go about displaying the TOP 3 rows BUT Having the remaining rows roll up into a row called "other", and it adds all of their Complaints together?
So like this for example:
+-----------+------------+
| STORENAME | COMPLAINTS |
+-----------+------------+
| Store1 | 4 |
| Store7 | 2 |
| Store8 | 1 |
| Other | 4 |
+-----------+------------+
So what has happened above, is it displays the top3 then adds the complaints of the remaining rows into a row called other
I have exhausted all my resources and cannot find a solution. Please let me know if this makes sense.
I have created a SQLfiddle of the above tables that you can edit if it is possible :)
Here's hoping this is possible :)
Thanks,
Mike

Something like this may work
select *, row_number() over (order by complaints desc) as sno
into #temp
from
(
SELECT
a.StoreName
,COUNT(b.StoreID) AS [Complaints]
FROM Stores a
LEFT JOIN
(
SELECT
StoreName
,Complaint
,StoreID
FROM Complaints
WHERE Complaint = 'yes') b on b.StoreID = a.StoreID
GROUP BY a.StoreName
) as t ORDER BY [Complaints] DESC
select storename,complaints from #temp where sno<4
union all
select 'other',sum(complaints) as complaints from #temp where sno>=4

I do this with double aggregation and row_number():
select (case when seqnum <= 3 then storename else 'Other' end) as StoreName,
sum(numcomplaints) as numcomplaints
from (select c.storename, count(*) as numcomplaints,
row_number() over (order by count(*) desc) as seqnum
from complaints c
where c.complaint = 'Yes'
group by c.storename
) s
group by (case when seqnum <= 3 then storename else 'Other' end) ;
From what I can see, you don't really need any additional information from stores, so this version just leaves that table out.

Sql two table query most duplicated foreign key

I got those two tables sport and student:
First table sport:
|idsport | name |
_______________________
| 1 | bobsled |
| 2 | skating |
| 3 | boarding |
| 4 | iceskating |
| 5 | skiing |
Second table student:
foreign key
|idstudent | name | sport_idsport
__________________________________________
| 1 | john | 3 |
| 2 | pauly | 2 |
| 3 | max | 1 |
| 4 | jane | 2 |
| 5 | nico | 5 |
so far i did this it output which number is mostly inserted, but cant get it to work
with two tables
SELECT sport_idsport
FROM (SELECT sport_idsport FROM student GROUP BY sport_idsport ORDER BY COUNT(*) desc)
WHERE ROWNUM<=1;
I need to output name of most popular sport, in that case it would be skating.
I use oracle sql.

with counter as (
Select sport_idsport,
count(*) as cnt,
dense_rank() over (order by count(*) desc) as rn
from student
group by sport_idsport
)
select s.*, c.cnt
from sport s
join counter c on c.sport_idsport = s.idsport and c.rn = 1;
SQLFiddle example: http://sqlfiddle.com/#!4/b76e21/1

select cnt, sport_idsport from (
select count(*) cnt, sport_idsport
from student
group by sport_idsport
order by count(*) desc
)
where rownum = 1

if more than 1 match, do not return 'unknown'

I composed a monster query. I'm certain that it can be optimized, and I would more than appreciate any comments/guidance on the query itself; however, I have a specific question:
The data I am returning is sometimes duplicated on multiple columns:
+-------+------+----------+------+-------+--------+----------+-------+------+
| first | last | deaID | cert | count | npi | clientid | month | year |
+-------+------+----------+------+-------+--------+----------+-------+------+
| Alex | Jue | UNKNOWN | MD | 11 | 123123 | 102889 | 7 | 2012 |
| Alex | Jue | BJ123123 | MD | 11 | 123123 | 102889 | 7 | 2012 |
+-------+------+----------+------+-------+--------+----------+-------+------+
as you can see all of the fields are equal except for deaID
in this case, I would like to only return:
+------+-----+----------+----+----+--------+--------+---+------+
| | | | | | | | | |
+------+-----+----------+----+----+--------+--------+---+------+
| Alex | Jue | BJ123123 | MD | 11 | 123123 | 102889 | 7 | 2012 |
+------+-----+----------+----+----+--------+--------+---+------+
however, if there are no duplicates:
+-------+------+---------+------+-------+--------+----------+-------+------+
| first | last | deaID | cert | count | npi | clientid | month | year |
+-------+------+---------+------+-------+--------+----------+-------+------+
| Alex | Jue | UNKNOWN | MD | 11 | 123123 | 102889 | 7 | 2012 |
+-------+------+---------+------+-------+--------+----------+-------+------+
then i would like to keep it!
summary
if there are duplicates remove all records with 'deaID=unknown'; however, if there is only 1 match then return that match
question
how do i return unknown records IFF there is 1 match?
here is the monster query in case anybody is interested :)
with ctebiggie as (
select distinct
p.[IMS_PRESCRIBER_ID],
p.PHYSICIAN_NPI as MLISNPI,
a.CLIENT_ID,
p.MLIS_FIRSTNAME,
p.MLIS_LASTNAME,
p_address.IMS_DEA_NBR,
p.IMS_PROFESSIONAL_ID_NBR,
p.IMS_PROFESSIONAL_ID_NBR_src,
p.IMS_CERTIFICATION_CODE,
datepart(mm,a.RECEIVED_DATE) as [Month],
datepart(yyyy,a.RECEIVED_DATE) as [Year]
from
MILLENNIUM_DW_dev..D_PHYSICIAN p
left outer join
MILLENNIUM_DW_dev..F_ACCESSION_DAILY a
on a.REQUESTOR_NPI=p.PHYSICIAN_NPI
left outer join MILLENNIUM_DW_dev..D_PHYSICIAN_ADDRESS p_address
on p.PHYSICIAN_NPI=p_address.PHYSICIAN_NPI
where
a.RECEIVED_DATE is not null
--and p.IMS_PRESCRIBER_ID is not null
--and p_address.IMS_DEA_NBR !='UNKNOWN'
and p.REC_ACTIVE_FLG=1
and p_address.REC_ACTIVE_FLG=1
and DATEPART(yyyy,received_date)=2012
and DATEPART(mm,received_date)=7
group by
p.[IMS_PRESCRIBER_ID],
p.PHYSICIAN_NPI,
p.IMS_PROFESSIONAL_ID_NBR,
p.MLIS_FIRSTNAME,
p.MLIS_LASTNAME,
p_address.IMS_DEA_NBR,
p.IMS_PROFESSIONAL_ID_NBR,
p.IMS_PROFESSIONAL_ID_NBR_src,
p.IMS_CERTIFICATION_CODE,
datepart(mm,a.RECEIVED_DATE),
datepart(yyyy,a.RECEIVED_DATE),
a.CLIENT_ID
)
,
ctecount as
(select
COUNT (Distinct f.ACCESSION_ID) [count],
f.REQUESTOR_NPI,f.CLIENT_ID,
datepart(mm,f.RECEIVED_DATE) mm,
datepart(yyyy,f.RECEIVED_DATE)yyyy
from MILLENNIUM_DW_dev..F_ACCESSION_DAILY f
where
f.CLIENT_ID not in (select * from SalesDWH..TestPractices)
and DATEPART(yyyy,f.received_date)=2012
and DATEPART(mm,f.received_date)=7
group by f.REQUESTOR_NPI,
f.CLIENT_ID,
datepart(mm,f.RECEIVED_DATE),
datepart(yyyy,f.RECEIVED_DATE)
)
select ctebiggie.*,c.* from
ctebiggie
full outer join
ctecount c
on c.REQUESTOR_NPI=ctebiggie.MLISNPI
and c.mm=ctebiggie.[Month]
and c.yyyy=ctebiggie.[Year]
and c.CLIENT_ID=ctebiggie.CLIENT_ID

Assuming you have the base query, I will assign row_number and count by partition function over this resultset. Then on the outer select, if count is 1 then unknown is selected, else it is not selected.
SELECT first,
last,
deaID,
cert,
count,
npi,
clientid,
month,
year
FROM (
SELECT first,
last,
deaID,
cert,
count,
npi,
clientid,
month,
year,
ROW_NUMBER() OVER (PARTITION BY
first,last,cert,count,npi,clientid,month,year
ORDER BY CASE WHEN deaID = 'Unkown' THEN 0 ELSE 1 END,
deaID) AS RowNumberInGroup,
COUNT() OVER (PARTITION BY first,last,cert,count,npi,clientid,month,year)
AS CountPerGroup,
SUM(CASE WHEN deaID = 'Unkown' THEN 1 ELSE 0 END)
OVER (PARTITION BY first,last,cert,count,npi,clientid,month,year)
AS UnknownCountPerGroup
FROM BaseQuery
) T
WHERE (T.CountPerGroup = T.UnknownCountPerGroup AND T.RowNumberInGroup = 1) OR T.RowNumberInGroup > T.UnknownCountPerGroup

see this helps or not
select distinct main.col1,main.col2 ,
isnull(( select col3 from table1 where table1.col1=main.col1
and table1.col2=main.col2 and col3 <>'UNKNOWN'),'UNKNOWN')
from table1 main
Sample in Sql fiddle
or fair version of yours will be
SELECT distinct first,
last,
cert,
count,
npi,
clientid,
month,
year,
isnull(
select top 1 dealid from table1 intable where
intable.first=maintable.first and
intable.last=maintable.last and
intable.cert=maintable.cert and
intable.npi=maintable.npi and
intable.clientid=outtable.clientid and
intable.month=outtable.month and
intable.year=outtable.year
where dealid<>'UNKNOWN'),'UNKNOWN') as dealId
FROM table1 maintable