SELECT Name1, Name2, Value FROM mytable gives me the following result set:
Name1 Name2 Value
A P1 1
A P2 1
A P3 2
B P1 3
B P2 1
B P4 1
How do I translate that to:
A B
P1 1 4
P2 1 1
P3 2 null
P4 null 1
Thanks,
Since you are using SQL Server 2005, here is the code:
DECLARE #cols VARCHAR(1000)
DECLARE #sqlquery VARCHAR(2000)
SELECT #cols = STUFF(( SELECT distinct ',' + QuoteName([Name1])
FROM myTable FOR XML PATH('') ), 1, 1, '')
SET #sqlquery = 'SELECT * FROM
(SELECT Name2, Name1, Value
FROM myTable ) base
PIVOT (Sum(Value) FOR [Name1]
IN (' + #cols + ')) AS finalpivot'
EXECUTE ( #sqlquery )
This will work no matter how many different status you have. It dynamically assembles a query with PIVOT. The only way you can do PIVOT with dynamic columns is by assembling the the query dynamically, which can be done in SQL Server.
Other examples:
Pivot data in T-SQL
How do I build a summary by joining to a single table with SQL Server?
https://stackoverflow.com/q/8248059/570191
I don't have SQL Server running here at work so this may not by completely syntatically correct but one approach would be cross tabulation
SELECT name2
, SUM(CASE WHEN name1 = 'A' THEN value END) AS A
, SUM(CASE WHEN name1 = 'B' THEN value END) AS B
FROM table
GROUP BY name2
For variable number of columns you could use dynamic SQL:
DECLARE #sql varchar(max)
SELECT #sql = COALESCE(#sql+',','') + 'SUM(CASE WHEN nane1 = '''+name1+''' THEN value END) AS ['+name1']' FROM table
SET #sql = 'SELECT name2, '+#sql+' FROM table GROUP BY name2'
EXEC(#sql)
You can use a PIVOT clause. Your query could be something like this:
WITH Source as (
SELECT Name1, Name2, [Value]
FROM mytable
)
SELECT Name2, CASE WHEN A IS NOT NULL THEN A ELSE 'your string' END As A
, CASE WHEN B IS NOT NULL THEN B ELSE 'your string' END As B
FROM (
SELECT Name2, Name1, [Value]
FROM Source
) s
PIVOT
(
MAX([Value]) FOR Name1 IN (A, B) -- any other Name1 would go here
) p
using your sample data above, my results were
P1 1 3
P2 1 1
P3 2 your string
P4 your string 1
EDIT:
Since you have an unknown number of columns, you will need to look at using dynamic SQL and there are several answers here on SO about that with PIVOT.
SQL Server 2005 Pivot on Unknown Number of Columns
Pivot Table and Concatenate Columns
Related
I have a table like this:
id
cols
val
1
date
01-01-01
1
name
abc
1
flag
True
1
end_date
null
2
date
01-01-02
2
name
abcd
2
flag
False
2
end_date
01-01-03
And I need to create a table that looks like
id
date
name
flag
end_date
1
01-01-01
abc
True
null
2
01-01-02
abcd
False
01-01-03
I can use select/with only. No functions or create/update
Thanks for your help
An interesting technique to remember is that you can use MAX(CASE WHEN... on text values to achieve results like this:
SELECT id
, MAX(CASE WHEN cols = 'date' THEN val ELSE NULL END) AS dt
, MAX(CASE WHEN cols = 'name' THEN val ELSE NULL END) AS nm
, MAX(CASE WHEN cols = 'flag' THEN val ELSE NULL END) AS flag
, MAX(CASE WHEN cols = 'end_date' THEN val ELSE NULL END) AS end_date
FROM #t
GROUP BY id
I've tried to avoid using SQL keywords as column names, so you have dt and nm instead of date and name.
You will probably want to apply some type casting as well to get it into a more usable format.
dbfiddle.uk
You can use the PIVOT and UNPIVOT relational operators to change a table-valued expression into another table. PIVOT rotates a table-valued expression by turning the unique values from one column in the expression into multiple columns in the output.
https://learn.microsoft.com/en-us/sql/t-sql/queries/from-using-pivot-and-unpivot?view=sql-server-ver15
U can use this query pivot it table value
DECLARE #cols AS NVARCHAR(MAX),
#query AS NVARCHAR(MAX);
SET #cols = STUFF((SELECT distinct ',' + QUOTENAME(c.cols)
FROM yourtablename c
).value('.', 'NVARCHAR(MAX)')
,1,1,'')
set #query = 'SELECT Id, ' + #cols + ' from
(
select id
,val
from yourtablename
) x
pivot
(
val
for cols in (' + #cols + ')
) p '
execute(#query);
Fairly new to SQL, so I do apologise!
Currently I have the following SQL Query:
select [data]
from Database1.dbo.tbl_Data d
join Database1.tbl_outbound o on d.session_id = o.session_id
where o.campaign_id = 1047
and d.session_id = 12
This returns ONE column which looks like this (and it can return different number of rows, depending on campaign_id and session_id!):
[data]
[1] Entry 1
[2] Entry 2
[3] Entry 3
[4] Entry 4
[5] Entry 5
.....
[98] Entry 98
[99] Entry 99
I would like to convert the data so they are displayed in 1 row and not 1 column, for example:
[data1] [data2] [data3] [data4] [data5] .... [data98] [data99]
[1] Entry 1 Entry 2 Entry 3 Entry 4 Entry 5 .... Entry 98 Entry 99
I hope I have explained that well enough! Thanks! :)
I have seen some information floating around about Pivot and Unpivot, but couldn't get it to play ball!
Try This Dynamic sql which helps your requirement
IF OBJECT_ID('tempdb..#Temp')IS NOT NULL
DROP TABLE #Temp
CREATE TABLE #Temp (data VARCHAR(100))
GO
IF OBJECT_ID('tempdb..#FormatedTable')IS NOT NULL
DROP TABLE #FormatedTable
Go
INSERT INTO #Temp(data)
SELECT 'Entry1' UNION ALL
SELECT 'Entry2' UNION ALL
SELECT 'Entry3' UNION ALL
SELECT 'Entry4' UNION ALL
SELECT 'Entry5'
SELECT ROW_NUMBER()OVER(ORDER BY Data) AS SeqId,
Data,
'Data'+CAST(ROW_NUMBER()OVER(ORDER BY Data) AS VARCHAR(100)) AS ReqColumn
INTO #FormatedTable
FROM #Temp
DECLARE #Sql nvarchar(max),
#DynamicColumn nvarchar(max),
#MaxDynamicColumn nvarchar(max)
SELECT #DynamicColumn = STUFF((SELECT ', '+QUOTENAME(ReqColumn)
FROM #FormatedTable FOR XML PATH ('')),1,1,'')
SELECT #MaxDynamicColumn = STUFF((SELECT ', '+'MAX('+(ReqColumn)+') AS '+QUOTENAME(CAST(ReqColumn AS VARCHAR(100)))
FROM #FormatedTable FOR XML PATH ('')),1,1,'')
SET #Sql=' SELECT ROW_NUMBER()OVER(ORDER BY (SELECT 1)) AS SeqId, '+ #MaxDynamicColumn+'
FROM
(
SELECT * FROM #FormatedTable
) AS src
PIVOT
(
MAX(Data) FOR [ReqColumn] IN ('+#DynamicColumn+')
) AS Pvt
'
EXEC (#Sql)
PRINT #Sql
Result
SeqId Data1 Data2 Data3 Data4 Data5
----------------------------------------------
1 Entry1 Entry2 Entry3 Entry4 Entry5
There is no really simple way. You can use pivot or conditional aggregation. I prefer the latter:
select max(case when left(data, 3) = '[1]' then data end) as data_001,
max(case when left(data, 3) = '[2]' then data end) as data_002,
max(case when left(data, 5) = '[100]' then data end) as data_100
from Database1.dbo.tbl_Data d join
Database1.tbl_outbound o
on d.session_id = o.session_id
where o.campaign_id = 1047 and d.session_id = 12;
Note that the columns are fixed, so you will always have 100 columns, regardless of the number of actual values in the data.
If you need a flexible number of columns, then you need dynamic pivoting, which requires constructing the query as a string and then executing the string.
The easiest way to do that is to utilize SQLCLR.
Check out the solution and explanation on An Easier Way of Transposing Query Result in SQL Server
I have a table where every ID has one or more places, and each place comes with a count. Places can be repeated within IDs. It is stored in rows like so:
ID ColumnName DataValue
1 place1 ABC
1 count1 5
2 place1 BEC
2 count1 12
2 place2 CDE
2 count2 6
2 place3 BEC
2 count3 9
3 place1 BBC
3 count1 5
3 place2 BBC
3 count2 4
Ultimately, I want a table where every possible place name is its own column, and the count per place per ID is summed up, like so:
ID ABC BEC CDE BBC
1 5 0 0 0
2 0 21 6 0
3 0 0 0 9
I don't know the best way to go about this. There are around 50 different possible place names, so specifically listing them out in a query isn't ideal. I know I ultimately have to pivot the data, but I don't know if I should do it before or after I sum up the counts. And whether it's before or after, I haven't been able to figure out how to go about summing it up.
Any ideas/help would be greatly appreciated. At this point, I'm having a hard time finding where to even start. I've seen a few posts with similar problems, but nothing quite as convoluted as this.
EDIT:
Right now I'm working with this to pivot the table, but this leaves me with columns named place1, place2, .... count1, count2,...
and I don't know how to appropriately sum up the counts and make new columns with the place names.
DECLARE #cols NVARCHAR(MAX), #query NVARCHAR(MAX);
SET #cols = STUFF(
(
SELECT DISTINCT
','+QUOTENAME(c.[ColumnName])
FROM #temp c FOR XML PATH(''), TYPE
).value('.', 'nvarchar(max)'), 1, 1, '');
SET #query = 'SELECT [ID], '+#cols+'from (SELECT [ID],
[DataValue] AS [amount],
[ColumnName] AS [category]
FROM #temp
)x pivot (max(amount) for category in ('+#cols+')) p';
EXECUTE (#query);
Your table structure is pretty bad. You'll need to normalize your data before you can attempt to pivot it. Try this:
;WITH IDs AS
(
SELECT DISTINCT
id
,ColId = RIGHT(ColumnName, LEN(ColumnName) - 5)
,Place = datavalue
FROM #temp
WHERE ISNUMERIC(datavalue) = 0
)
,Counts AS
(
SELECT DISTINCT
id
,ColId = RIGHT(ColumnName, LEN(ColumnName) - 5)
,Cnt = CAST(datavalue AS INT)
FROM #temp
WHERE ISNUMERIC(datavalue) = 1
)
SELECT
piv.id
,ABC = ISNULL(piv.ABC, 0)
,BEC = ISNULL(piv.BEC, 0)
,CDE = ISNULL(piv.CDE, 0)
,BBC = ISNULL(piv.BBC, 0)
FROM (SELECT i.id, i.Place, c.Cnt FROM IDs i JOIN Counts c ON c.id = i.id AND c.ColId = i.ColId) src
PIVOT ( SUM(Cnt)
FOR Place IN ([ABC], [BEC], [CDE], [BBC])
) piv;
Doing it with dynamic SQL would yield the following:
SET #query =
';WITH IDs AS
(
SELECT DISTINCT
id
,ColId = RIGHT(ColumnName, LEN(ColumnName) - 5)
,Place = datavalue
FROM #temp
WHERE ISNUMERIC(datavalue) = 0
)
,Counts AS
(
SELECT DISTINCT
id
,ColId = RIGHT(ColumnName, LEN(ColumnName) - 5)
,Cnt = CAST(datavalue AS INT)
FROM #temp
WHERE ISNUMERIC(datavalue) = 1
)
SELECT [ID], '+#cols+'
FROM
(
SELECT i.id, i.Place, c.Cnt
FROM IDs i
JOIN Counts c ON c.id = i.id AND c.ColId = i.ColId
) src
PIVOT
(SUM(Cnt) FOR Place IN ('+#cols+')) piv;';
EXECUTE (#query);
Try this out:
SELECT id,
COALESCE(ABC, 0) AS ABC,
COALESCE(BBC, 0) AS BBC,
COALESCE(BEC, 0) AS BEC,
COALESCE(CDE, 0) AS CDE
FROM
(SELECT id,
MIN(CASE WHEN columnname LIKE 'place%' THEN datavalue END) AS col,
CAST(MIN(CASE WHEN columnname LIKE 'count%' THEN datavalue END) AS INT) AS val
FROM t
GROUP BY id, RIGHT(columnname, 1)
) src
PIVOT
(SUM(val)
FOR col in ([ABC], [BBC], [BEC], [CDE])) pvt
Tested here: http://rextester.com/XUTJ68690
In the src query, you need to re-format your data, so that you have a unique id and place in each row. From there a pivot will work.
If the count is always immediately after the place, the following query will generate a data set for pivoting.
The result data set before pivoting has the following columns:
id, placename, count
select placeTable.id, placeTable.datavalue, countTable.datavalue
from
(select *, row_number() over (order by id, %%physloc%%) as rownum
from test
where isnumeric(datavalue) = 1
) as countTable
join
(select *, row_number() over (order by id, %%physloc%%) as rownum
from test
where isnumeric(datavalue) <> 1
) as placeTable
on countTable.id = placeTable.id and
countTable.rownum = placeTable.rownum
Tested on sqlfidde mssqlserver: http://sqlfiddle.com/#!6/701c91/18
Here is one other approach using PIVOT operator with dynamic style
declare #Col varchar(2000) = '',
#Query varchar(2000) = ''
set #Col = stuff(
(select ','+QUOTENAME(DataValue)
from table where isnumeric(DataValue) = 0
group by DataValue for xml path('')),1,1,'')
set #Query = 'select id, '+#Col+' from
(
select id, DataValue,
cast((case when isnumeric(DataValue) = 1 then DataValue else lead(DataValue) over (order by id) end) as int) Value
from table
) as a
PIVOT
(
sum(Value) for DataValue in ('+#Col+')
)pvt'
EXECUTE (#Query)
Note : I have used lead() function to access next rows data if i found character string values and replace with numeric data values
Result :
id ABC BBC BEC CDE
1 5 NULL NULL NULL
2 NULL NULL 21 6
3 NULL 9 NULL NULL
I have two tables
Program
Student
Student:
Name Status1 Syear SCode
--------------------
kk A 2000 1
ra A 2001 2
Paras L 2000 2
Prit L 2001 2
Poot A 2002 4
Program:
PName PCode
--------------------
Msc 1
DC 2
PO 4
Join on ID
Required output :
SELECT *
FROM
(SELECT
Program.PName AS v, Status1
FROM
Student, Program
WHERE
Student.PCode = SCode
GROUP BY
Program.PName, Student.Syear, Status1) AS src
pivot
(
count(v)
FOR Status1 IN ([A],)
) as piv
It does not display PNAME in output
A L
-----------
1 0
1 2
1 0
Desired output
PNAME A L
-----------
Msc 1 0
DC 1 2
PO 1 0
1. STATIC PIVOT
You can do this if the column names is known in advance
SELECT PName,ISNULL([A],0) [A],ISNULL([L],0)[L] FROM
(
-- Source data for pivoting
SELECT P.PName,Status1,
COUNT(Status1)OVER(PARTITION BY PNAME,Status1)CNT
FROM #PROGRAM P
JOIN #Student S ON P.PCODE=S.SCODE
) x
PIVOT
(
--Defines the values in each dynamic columns
MIN(CNT)
-- Get the names of columns to pivot
FOR Status1 IN ([A],[L])
) p
ORDER BY PName
Click here to view result
2. DYNAMIC PIVOT
Dynamic pivoting can be done if the number of columns is not known in advance.
First of all get columns dynamically to pivot
DECLARE #cols NVARCHAR (MAX)
SELECT #cols = COALESCE (#cols + ',[' + Status1 + ']', '[' + Status1 + ']')
FROM (SELECT DISTINCT Status1 FROM #Student) PV
ORDER BY Status1
Now the below variable is used to replace NULL with zero.
DECLARE #NulltoZeroCols NVARCHAR (MAX)
SELECT #NullToZeroCols = SUBSTRING((SELECT ',ISNULL(['+Status1+'],0) AS ['+Status1+']'
FROM (SELECT DISTINCT Status1 FROM #Student)TAB
ORDER BY Status1 FOR XML PATH('')),2,8000)
Now pivot it. I have written the logic inside
DECLARE #query NVARCHAR(MAX)
SET #query = '-- This outer query forms your pivoted result
SELECT PName,'+#NullToZeroCols+' FROM
(
-- Source data for pivoting
SELECT P.PName,Status1,
COUNT(Status1)OVER(PARTITION BY PNAME,Status1)CNT
FROM #PROGRAM P
JOIN #Student S ON P.PCODE=S.SCODE
) x
PIVOT
(
--Defines the values in each dynamic columns
MIN(CNT)
-- Get the names from the #cols variable to show as column
FOR Status1 IN (' + #cols + ')
) p
ORDER BY PName;'
EXEC SP_EXECUTESQL #query
Click here to view result
Currently building a SELECT statement in SQL Server 2008 but would like to make this SELECT statement dynamic, so the columns can be defined based on values in a table. I heard about pivot table and cursors, but seems kind of hard to understand at my current level, here is the code;
DECLARE #date DATE = null
IF #date is null
set # date = GETDATE() as DATE
SELECT
Name,
value1,
value2,
value3,
value4
FROM ref_Table a
FULL OUTER JOIN (
SELECT
PK_ID ID,
sum(case when FK_ContainerType_ID = 1 then 1 else null) Box,
sum(case when FK_ContainerType_ID = 2 then 1 else null) Pallet,
sum(case when FK_ContainerType_ID = 3 then 1 else null) Bag,
sum(case when FK_ContainerType_ID = 4 then 1 else null) Drum
from
Packages
WHERE
#date between PackageStart AND PackageEnd
group by PK_ID ) b on a.Name = b.ID
where
Group = 0
The following works great for me , but PK_Type_ID and the name of the column(PackageNameX,..) are hard coded, I need to be dynamic and it can build itself based on present or futures values in the Package table.
Any help or guidance on the right direction would be greatly appreciated...,
As requested
ref_Table (PK_ID, Name)
1, John
2, Mary
3, Albert
4, Jane
Packages (PK_ID, FK_ref_Table_ID, FK_ContainerType_ID, PackageStartDate, PackageEndDate)
1 , 1, 4, 1JAN2014, 30JAN2014
2 , 2, 3, 1JAN2014, 30JAN2014
3 , 3, 2, 1JAN2014, 30JAN2014
4 , 4, 1, 1JAN2014, 30JAN2014
ContainerType (PK_ID, Type)
1, Box
2, Pallet
3, Bag
4, Drum
and the result should look like this;
Name Box Pallet Bag Drum
---------------------------------------
John 1
Mary 1
Albert 1
Jane 1
The following code like I said works great, the issue is the Container table is going to grow and I need to replicated the same report without hard coding the columns.
What you need to build is called a dynamic pivot. There are plenty of good references on Stack if you search out that term.
Here is a solution to your scenario:
IF OBJECT_ID('tempdb..##ref_Table') IS NOT NULL
DROP TABLE ##ref_Table
IF OBJECT_ID('tempdb..##Packages') IS NOT NULL
DROP TABLE ##Packages
IF OBJECT_ID('tempdb..##ContainerType') IS NOT NULL
DROP TABLE ##ContainerType
SET NOCOUNT ON
CREATE TABLE ##ref_Table (PK_ID INT, NAME NVARCHAR(50))
CREATE TABLE ##Packages (PK_ID INT, FK_ref_Table_ID INT, FK_ContainerType_ID INT, PackageStartDate DATE, PackageEndDate DATE)
CREATE TABLE ##ContainerType (PK_ID INT, [Type] NVARCHAR(50))
INSERT INTO ##ref_Table (PK_ID,NAME)
SELECT 1,'John' UNION
SELECT 2,'Mary' UNION
SELECT 3,'Albert' UNION
SELECT 4,'Jane'
INSERT INTO ##Packages (PK_ID, FK_ref_Table_ID, FK_ContainerType_ID, PackageStartDate, PackageEndDate)
SELECT 1,1,4,'2014-01-01','2014-01-30' UNION
SELECT 2,2,3,'2014-01-01','2014-01-30' UNION
SELECT 3,3,2,'2014-01-01','2014-01-30' UNION
SELECT 4,4,1,'2014-01-01','2014-01-30'
INSERT INTO ##ContainerType (PK_ID, [Type])
SELECT 1,'Box' UNION
SELECT 2,'Pallet' UNION
SELECT 3,'Bag' UNION
SELECT 4,'Drum'
DECLARE #DATE DATE, #PARAMDEF NVARCHAR(MAX), #COLS NVARCHAR(MAX), #SQL NVARCHAR(MAX)
SET #DATE = '2014-01-15'
SET #COLS = STUFF((SELECT DISTINCT ',' + QUOTENAME(T.[Type])
FROM ##ContainerType T
FOR XML PATH, TYPE).value('.', 'NVARCHAR(MAX)'),1,1,'')
SET #SQL = 'SELECT [Name], ' + #COLS + '
FROM (SELECT [Name], [Type], 1 AS Value
FROM ##ref_Table R
JOIN ##Packages P ON R.PK_ID = P.FK_ref_Table_ID
JOIN ##ContainerType T ON P.FK_ContainerType_ID = T.PK_ID
WHERE #DATE BETWEEN P.PackageStartDate AND P.PackageEndDate) X
PIVOT (COUNT(Value) FOR [Type] IN (' + #COLS + ')) P
'
PRINT #COLS
PRINT #SQL
SET #PARAMDEF = '#DATE DATE'
EXEC SP_EXECUTESQL #SQL, #PARAMDEF, #DATE=#DATE
Output:
Name Bag Box Drum Pallet
Albert 0 0 0 1
Jane 0 1 0 0
John 0 0 1 0
Mary 1 0 0 0
Static Query:
SELECT [Name],[Box],[Pallet],[Bag],[Drum] FROM
(
SELECT *
FROM
(
SELECT rf.Name,cnt.[Type], pk.PK_ID AS PKID, rf.PK_ID AS RFID
FROM ref_Table rf INNER JOIN Packages pk ON rf.PK_ID = pk.FK_ref_Table_ID
INNER JOIN ContanerType cnt ON cnt.PK_ID = pk.FK_ContainerType_ID
) AS SourceTable
PIVOT
(
COUNT(PKID )
FOR [Type]
IN ( [Box],[Pallet],[Bag],[Drum])
) AS PivotTable
) AS Main
ORDER BY RFID
Dynamic Query:
DECLARE #columnList nvarchar (MAX)
DECLARE #pivotsql nvarchar (MAX)
SELECT #columnList = STUFF(
(
SELECT ',' + '[' + [Type] + ']'
FROM ContanerType
FOR XML PATH( '')
)
,1, 1,'' )
SET #pivotsql =
N'SELECT [Name],' + #columnList + ' FROM
(
SELECT *
FROM
(
SELECT rf.Name,cnt.[Type], pk.PK_ID AS PKID, rf.PK_ID AS RFID
FROM ref_Table rf INNER JOIN Packages pk ON rf.PK_ID = pk.FK_ref_Table_ID
INNER JOIN ContanerType cnt ON cnt.PK_ID = pk.FK_ContainerType_ID
) AS SourceTable
PIVOT
(
COUNT(PKID )
FOR [Type]
IN ( ' + #columnList + ')
) AS PivotTable
) AS Main
ORDER BY RFID;'
EXEC sp_executesql #pivotsql
Following my tutorial below will help you to understand the PIVOT functionality:
We write sql queries in order to get different result sets like full, partial, calculated, grouped, sorted etc from the database tables. However sometimes we have requirements that we have to rotate our tables. Sounds confusing?
Let's keep it simple and consider the following two screen grabs.
SQL Table:
Expected Results:
Wow, that's look like a lot of work! That is a combination of tricky sql, temporary tables, loops, aggregation......, blah blah blah
Don't worry let's keep it simple, stupid(KISS).
MS SQL Server 2005 and above has a function called PIVOT. It s very simple to use and powerful. With the help of this function we will be able to rotate sql tables and result sets.
Simple steps to make it happen:
Identify all the columns those will be part of the desired result set.
Find the column on which we will apply aggregation(sum,ave,max,min etc)
Identify the column which values will be the column header.
Specify the column values mentioned in step3 with comma separated and surrounded by square brackets.
So, if we now follow above four steps and extract information from the above sales table, it will be as below:
Year, Month, SalesAmount
SalesAmount
Month
[Jan],[Feb] ,[Mar] .... etc
We are nearly there if all the above steps made sense to you so far.
Now we have all the information we need. All we have to do now is to fill the below template with required information.
Template:
Our SQL query should look like below:
SELECT *
FROM
(
SELECT SalesYear, SalesMonth,Amount
FROM Sales
) AS SourceTable
PIVOT
(
SUM(Amount )
FOR SalesMonth
IN ( [Jan],[Feb] ,[Mar],
[Apr],[May],[Jun] ,[Jul],
[Aug],[Sep] ,[Oct],[Nov] ,[Dec])
) AS PivotTable;
In the above query we have hard coded the column names. Well it's not fun when you have to specify a number of columns.
However, there is a work arround as follows:
DECLARE #columnList nvarchar (MAX)
DECLARE #pivotsql nvarchar (MAX)
SELECT #columnList = STUFF(
(
SELECT ',' + '[' + SalesMonth + ']'
FROM Sales
GROUP BY SalesMonth
FOR XML PATH( '')
)
,1, 1,'' )
SET #pivotsql =
N'SELECT *
FROM
(
SELECT SalesYear, SalesMonth,Amount
FROM Sales
) AS SourceTable
PIVOT
(
SUM(Amount )
FOR SalesMonth
IN ( ' + #columnList +' )
) AS PivotTable;'
EXEC sp_executesql #pivotsql
Hopefully this tutorial will be a help to someone somewhere.
Enjoy coding.