I have two tables:
CREATE TABLE #A (id int, cond_id int)
INSERT INTO #A (id, cond_id)
VALUES (101,20),
(101,22),
(101,24),
(102,23),
(102,22)
Now, each id can have max of 4 cond_ids. I want to populate table #B so that there is one id and all cond_ids will be populated in the columns as one row according to cond_id ascending.
like for id 102, cond_id 22 goes in cond_id and 23 goes in cond_id2.
create table #B (id int, cond_id1 int, cond_id2 int, cond_id3 int, cond_id4 int)
Desired result:
Table #B
id cond_id1 cond_id2 cond_id3 cond_id4
101 20 22 24 null
102 22 23 null null
Thanks in advance!
Because you know the maximum number of columns, one option is to use row_number, max and case:
with cte as (
select row_number() over (partition by id order by cond_id) rn, id, cond_id
from a)
select id,
max(case when rn = 1 then cond_id end) cond_id1,
max(case when rn = 2 then cond_id end) cond_id2,
max(case when rn = 3 then cond_id end) cond_id3,
max(case when rn = 4 then cond_id end) cond_id4
from cte
group by id
SQL Fiddle Demo
Or you could look at Pivot:
select id, [1] cond_id1, [2] cond_id2, [3] cond_id3, [4] cond_id4
from
(select row_number() over (partition by id order by cond_id) rn, id, cond_id
from a) t
pivot
(
max(cond_id)
for rn in ([1], [2], [3], [4])
) p
More Fiddle
Related
I am trying to have row_number based on custom grouping but I am not able to produce it.
Below is my Query
CREATE TABLE mytbl (wid INT, id INT)
INSERT INTO mytbl Values(1,1),(2,1),(3,0),(4,2),(5,3)
Current Output
wid id
1 1
2 1
3 0
4 2
5 3
Query
SELECT *, RANK() OVER(PARTITION BY wid, CASE WHEN id = 0 THEN 0 ELSE 1 END ORDER BY ID)
FROM mytbl
I would like to rank the rows based on custom condition like if ID is 0 then I have start new group until I have non 0 ID.
Expected Output
wid id RN
1 1 1
2 1 1
3 0 1
4 2 2
5 3 2
Guessing here, as we don't have much clarification, but perhaps this:
SELECT wid,
id,
COUNT(CASE id WHEN 0 THEN 1 END) OVER (ORDER BY wid ROWS BETWEEN UNBOUNDED PRECEDING AND 1 PRECEDING) +1 AS [Rank]
FROM mytbl ;
If I understand you correctly, you may use the next approach. Note, that you need to have an ordering column (I assume this is wid column):
Statement:
;WITH ChangesCTE AS (
SELECT
*,
CASE WHEN LAG(id) OVER (ORDER BY wid) = 0 THEN 1 ELSE 0 END AS ChangeIndex
FROM mytbl
), GroupsCTE AS (
SELECT
*,
SUM(ChangeIndex) OVER (ORDER BY wid) AS GroupIndex
FROM ChangesCTE
)
SELECT
wid,
id,
DENSE_RANK() OVER (ORDER BY GroupIndex) AS Rank
FROM GroupsCTE
Result:
wid id Rank
1 1 1
2 1 1
3 0 1
4 2 2
5 3 2
without much clarification on the logic required, my understanding is you want to increase the Rank by 1 whenever id = 0
select wid, id,
[Rank] = sum(case when id = 0 then 1 else 0 end) over(order by wid)
+ case when id <> 0 then 1 else 0 end
from mytbl
Try this,
CREATE TABLE #mytbl (wid INT, id INT)
INSERT INTO #mytbl Values(1,1),(2,1),(3,0)
,(4,2),(5,3),(6,0),(7,4),(8,5),(9,6)
;with CTE as
(
select *,ROW_NUMBER()over(order by wid)rn
from #mytbl where id=0
)
,CTE1 as
(
select max(rn)+1 ExtraRN from CTE
)
select a.* ,isnull(ca.rn,ca1.ExtraRN) from #mytbl a
outer apply(select top 1 * from CTE b
where a.wid<=b.wid )ca
cross apply(select ExtraRN from CTE1)ca1
drop table #mytbl
Here both OUTER APPLY and CROSS APPLY will not increase cardianility estimate.It will always return only one rows.
This is in reference to below Question
Loop through each value to the seq num
But now Client want to see the data differently and started a new thread for this question.
below is the requirement.
This is the data .
ID seqNum DOS Service End Date
1 1 1/1/2017 1/15/2017
1 2 1/16/2017 1/16/2017
1 3 1/17/2017 1/21/2017
1 4 1/22/2017 2/13/2017
1 5 2/14/2017 3/21/2017
1 6 2/16/2017 3/21/2017
Expected outPut:
ID SeqNum DOSBeg DOSEnd
1 1 1/1/2017 1/30/2017
1 2 1/31/2017 3/1/2017
1 3 3/2/2017 3/31/2017
For each DOSBeg, add 29 and that is DOSEnd. then Add 1 to DOSEnd (1/31/2017) is new DOSBeg.
Now add 29 to (1/31/2017) and that is 3/1/2017 which is DOSEnd . Repeat this untill DOSend >=Max End Date i.e 3/21/2017.
Basically, we need episode of 29 days for each ID.
I tried with this code and it is giving me duplicates.
with cte as (
select ID, minDate as DOSBeg,dateadd(day,29,mindate) as DOSEnd
from #temp
union all
select ID,dateadd(day,1,DOSEnd) as DOSBeg,dateadd(day,29,dateadd(day,1,DOSEnd)) as DOSEnd
from cte
)
select ID,DOSBeg,DOSEnd
from cte
OPTION (MAXRECURSION 0)
Here mindate is Minimum DOS for this ID i.e. 1/1/2017
I came up with below logic and this is working fine for me. Is there any better way than this ?
declare #table table (id int, seqNum int identity(1,1), DOS date, ServiceEndDate date)
insert into #table
values
(1,'20170101','20170115'),
(1,'20170116','20170116'),
(1,'20170117','20170121'),
(1,'20170122','20170213'),
(1,'20170214','20170321'),
(1,'20170216','20170321'),
(2,'20170101','20170103'),
(2,'20170104','20170118')
select * into #temp from #table
--drop table #data
select distinct ID, cast(min(DOS) over (partition by ID) as date) as minDate
,row_Number() over (partition by ID order by ID, DOS) as SeqNum,
DOS,
max(ServiceEndDate) over (partition by ID)as maxDate
into #data
from #temp
--drop table #StartDateLogic
with cte as
(select ID,mindate as startdate,maxdate
from #data
union all
select ID,dateadd(day,30,startdate) as startdate,maxdate
from cte
where maxdate >= dateadd(day,30,startdate))
select distinct ID,startdate
into #StartDateLogic
from cte
OPTION (MAXRECURSION 0)
--final Result set
select ID
,ROW_NUMBER() over (Partition by ID order by ID,StartDate) as SeqNum
,StartDate
,dateadd(day,29,startdate) as EndDate
from #StartDateLogic
You were on the right track wit the recursive cte, but you forgot the anchor.
declare #table table (id int, seqNum int identity(1,1), DOS date, ServiceEndDate date)
insert into #table
values
(1,'20170101','20170115'),
(1,'20170116','20170116'),
(1,'20170117','20170121'),
(1,'20170122','20170213'),
(1,'20170214','20170321'),
(1,'20170216','20170321'),
(2,'20170101','20170103'),
(2,'20170104','20170118')
;with dates as(
select top 1 with ties id, seqnum, DOSBeg = DOS, DOSEnd = dateadd(day,29,DOS)
from #table
order by row_number() over (partition by id order by seqnum)
union all
select t.id, t.seqNum, DOSBeg = dateadd(day,1,d.DOSEnd), DOSEnd = dateadd(day,29,dateadd(day,1,d.DOSEnd))
from dates d
inner join #table t on
d.id = t.id and t.seqNum = d.seqNum + 1
)
select *
from dates d
where d.DOSEnd <= (select max(dateadd(month,1,ServiceEndDate)) from #table where id = d.id)
order by id, seqNum
I'm trying to pivot the following and I don't know why I'm having such a hard time figuring it out.
Data Script
create table #data (ID varchar(50)
, nm varchar(50)
, val decimal(18,2)
)
insert into #data values (1,'Name1', 100.00),
(1,'Name2', 200.00),
(2,'Name3', 300.00),
(2,'Name4', 400.00),
(2,'Name5', 500.00),
(3,'Name6', 600.00),
(4,'Name7', 700.00),
(4,'Name8', 800.00),
(5,'Name9', 900.00)
Wanted Results As A Table in SQL Server
1 Name1 100 Name2 200
2 Name3 300 Name4 400 Name5 500
3 Name6 600
4 Name7 700 Name8 800
5 Name9 900
Update:
The following provides results in two fields, but what I really want is for the Name and Values to all exist in separate columns, not in one,
SELECT id,
(
SELECT nm,val
FROM #data
WHERE id = d.id
ORDER BY id FOR XML PATH('')
)
FROM #data d
WHERE
id IS NOT NULL
GROUP BY id;
This is an example of "pivot" not aggregate string concatenation. One issue with SQL queries is that you need to specify the exact columns being returned. So, this cannot be dynamic with respect to the returning columns.
The following returns up to three values per nm:
select id,
max(case when seqnum = 1 then nm end) as nm_1,
max(case when seqnum = 1 then val end) as val_1,
max(case when seqnum = 2 then nm end) as nm_2,
max(case when seqnum = 2 then val end) as val_2,
max(case when seqnum = 3 then nm end) as nm_3,
max(case when seqnum = 3 then val end) as val_3
from (select d.*,
row_number() over (partition by id order by (select null)) as seqnum
from #data d
) d
group by id;
Note that you probably want the columns in insertion order. If so, you need to specify a column with the ordering. I would recommend defining the table as:
create table #data (
dataId int identity(1, 1,) primary key,
ID varchar(50),
nm varchar(50),
val decimal(18,2)
);
Country Percentage
India 12%
USA 20%
Australia 15%
Qatar 10%
Output :
Country1 Percentage1 Country2 Percentage2
India 12% Australia 15%
USA 20% Qatar 10%
For example there is a table Country which has percentages, I need to divide the table in Half and show the remaining half (i.e. the remaining rows) in the new columns. I've also provided the table structure in text.
First, this type of operation should be done at the application layer and not in the database. That said, it can be an interesting exercise to see how to do this in the database.
I would use conditional aggregation or pivot. Note that SQL tables are inherently unordered. Your base table has no apparent ordering, so the values could come out in any order.
select max(case when seqnum % 2 = 0 then country end) as country_1,
max(case when seqnum % 2 = 0 then percentage end) as percentage_1,
max(case when seqnum % 2 = 1 then country end) as country_2,
max(case when seqnum % 2 = 1 then percentage end) as percentage_2
from (select c.*,
(row_number() over (order by (select null)) - 1) as seqnum
from country c
) c
group by seqnum / 2;
Try this
declare #t table
(
Country VARCHAR(20),
percentage INT
)
declare #cnt int
INSERT INTO #T
VALUES('India',12),('USA',20),('Australia',15),('Quatar',12)
select #cnt = count(1)+1 from #t
;with cte
as
(
select
SeqNo = row_number() over(order by Country),
Country,
percentage
from #t
)
select
*
from cte c1
left join cte c2
on c1.seqno = (c2.SeqNo-#cnt/2)
and c2.SeqNo >= (#cnt/2)
where c1.SeqNo <= (#cnt/2)
My variant
SELECT 'A' Country,1 Percentage INTO #Country
UNION ALL SELECT 'B' Country,2 Percentage
UNION ALL SELECT 'C' Country,3 Percentage
UNION ALL SELECT 'D' Country,4 Percentage
UNION ALL SELECT 'E' Country,5 Percentage
;WITH numCTE AS(
SELECT
*,
ROW_NUMBER()OVER(ORDER BY Country) RowNum,
COUNT(*)OVER() CountOfCountry
FROM #Country
),
set1CTE AS(
SELECT Country,Percentage,ROW_NUMBER()OVER(ORDER BY Country) RowNum
FROM numCTE
WHERE RowNum<=CEILING(CountOfCountry/2.)
),
set2CTE AS(
SELECT Country,Percentage,ROW_NUMBER()OVER(ORDER BY Country) RowNum
FROM numCTE
WHERE RowNum>CEILING(CountOfCountry/2.)
)
SELECT
s1.Country,s1.Percentage,
s2.Country,s2.Percentage
FROM set1CTE s1
LEFT JOIN set2CTE s2 ON s1.RowNum=s2.RowNum
DROP TABLE #Country
I just wanted to try something. I have used the function OFFSET. It does the requirement i think for your sample data, but dont know if its bulletproof all the way:
SQL Code
declare #myt table (country nvarchar(50),percentage int)
insert into #myt
values
('India' ,12),
('USA' ,20),
('Australia' ,15),
('Qatar' ,10),
('Denmark',10)
DECLARE #TotalRows int
SET #TotalRows = (select CEILING(count(*) / 2.) from #myt);
WITH dataset1 AS (
SELECT *,ROW_NUMBER() over(order by country ) as rn from (
SELECT Country,percentage from #myt a
ORDER BY country OFFSET 0 rows FETCH FIRST #TotalRows ROWS ONLY
) z
)
,dataset2 AS (
SELECT *,ROW_NUMBER() over(order by country ) as rn from (
SELECT Country,percentage from #myt a
ORDER BY country OFFSET #TotalRows rows FETCH NEXT #TotalRows ROWS ONLY
) z
)
SELECT * FROM dataset1 a LEFT JOIN dataset2 b ON a.rn = b.rn
Result
Assuming you want descending alphabetic country names, but the left column is determined by where India is located in the result:
with CoutryCTE as (
select c.*
, row_number() over (order by country)-1 as rn
from country c
)
, Col as (
select rn % 2 as num from CoutryCTE
where Country = 'India'
)
select max(case when rn % 2 = Col.num then country end) as country_1
, max(case when rn % 2 = Col.num then percentage end) as percentage_1
, max(case when rn % 2 <> Col.num then country end) as country_2
, max(case when rn % 2 <> Col.num then percentage end) as percentage_2
from CoutryCTE
cross join Col
group by rn / 2
;
SQLFiddle Demo
| country_1 | percentage_1 | country_2 | percentage_2 |
|-----------|--------------|-----------|--------------|
| India | 12% | Australia | 15% |
| USA | 20% | Qatar | 10% |
nb: this is extremely similar to an earlier answer by Gordon Linoff
example table:
test_date | test_result | unique_ID
12/25/15 | 100 | 50
12/01/15 | 150 | 75
10/01/15 | 135 | 75
09/22/14 | 99 | 50
04/10/13 | 125 | 50
I need to find the first and last test date as well as the test result to match said date by user. So, I can group by ID, but not test result.
SELECT MAX(test_date)[need matching test_result],
MIN(test_date) [need matching test_result],
unique_id
from [table]
group by unique_id
THANKS!
Create TABLE #t
(
test_date date ,
Test_results int,
Unique_id int
)
INSERT INTO #t
VALUES ( '12/25/15',100,50 ),
( '12/01/15',150,75 ),
( '10/01/15',135,75 ),
( '09/22/14',99,50 ),
( '04/10/13',125,50 )
select 'MinTestDate' as Type, a.test_date, a.Test_results, a.Unique_id
from #t a inner join (
select min(test_date) as test_datemin, max(test_date) as test_datemax, unique_id from #t
group by unique_ID) b
on a.test_date = b.test_datemin
union all
select 'MaxTestDate' as Type, a.test_date, a.Test_results, a.Unique_id from #t a
inner join (
select min(test_date) as test_datemin, max(test_date) as test_datemax, unique_id from #t
group by unique_ID) b
on a.test_date = b.test_datemax
I would recommend window functions. The following returns the information on 2 rows per id:
select t.*
from (select t.*,
row_number() over (partition by unique_id order by test_date) as seqnum_asc,
row_number() over (partition by unique_id order by test_date desc) as seqnum_desc
from table t
) t;
For one row, use conditional aggregation (or pivot if you prefer):
select unique_id,
min(test_date), max(case when seqnum_asc = 1 then test_result end),
max(test_date), max(case when seqnum_desc = 1 then test_result end)
from (select t.*,
row_number() over (partition by unique_id order by test_date) as seqnum_asc,
row_number() over (partition by unique_id order by test_date desc) as seqnum_desc
from table t
) t
group by unique_id;
Consider using a combination of self-joins and derived tables:
SELECT t1.unique_id, minTable.MinOftest_date, t1.test_result As Mintestdate_result,
maxTable.MaxOftest_date, t2.test_result As Maxtestdate_result
FROM TestTable AS t1
INNER JOIN
(
SELECT Min(TestTable.test_date) AS MinOftest_date,
TestTable.unique_ID
FROM TestTable
GROUP BY TestTable.unique_ID
) As minTable
ON (t1.test_date = minTable.MinOftest_date
AND t1.unique_id = minTable.unique_id)
INNER JOIN TestTable As t2
INNER JOIN
(
SELECT Max(TestTable.test_date) AS MaxOftest_date,
TestTable.unique_ID
FROM TestTable
GROUP BY TestTable.unique_ID
) AS maxTable
ON t2.test_date = maxTable.MaxOftest_date
AND t2.unique_ID = maxTable.unique_ID
ON minTable.unique_id = maxTable.unique_id;
OUTPUT
unique_id MinOftest_date Mintestdate_result MaxOftest_date Maxtestdate_result
50 4/10/2013 125 12/25/2015 100
75 10/1/2015 135 12/1/2015 150