I've been tasked with coming up with a means of translating the following data:
date category amount
1/1/2012 ABC 1000.00
2/1/2012 DEF 500.00
2/1/2012 GHI 800.00
2/10/2012 DEF 700.00
3/1/2012 ABC 1100.00
into the following:
date ABC DEF GHI
1/1/2012 1000.00
2/1/2012 500.00
2/1/2012 800.00
2/10/2012 700.00
3/1/2012 1100.00
The blank spots can be NULLs or blanks, either is fine, and the categories would need to be dynamic. Another possible caveat to this is that we'll be running the query in a limited capacity, which means temp tables are out. I've tried to research and have landed on PIVOT but as I've never used that before I really don't understand it, despite my best efforts to figure it out. Can anyone point me in the right direction?
Dynamic SQL PIVOT:
create table temp
(
date datetime,
category varchar(3),
amount money
)
insert into temp values ('1/1/2012', 'ABC', 1000.00)
insert into temp values ('2/1/2012', 'DEF', 500.00)
insert into temp values ('2/1/2012', 'GHI', 800.00)
insert into temp values ('2/10/2012', 'DEF', 700.00)
insert into temp values ('3/1/2012', 'ABC', 1100.00)
DECLARE #cols AS NVARCHAR(MAX),
#query AS NVARCHAR(MAX);
SET #cols = STUFF((SELECT distinct ',' + QUOTENAME(c.category)
FROM temp c
FOR XML PATH(''), TYPE
).value('.', 'NVARCHAR(MAX)')
,1,1,'')
set #query = 'SELECT date, ' + #cols + ' from
(
select date
, amount
, category
from temp
) x
pivot
(
max(amount)
for category in (' + #cols + ')
) p '
execute(#query)
drop table temp
Results:
Date ABC DEF GHI
2012-01-01 00:00:00.000 1000.00 NULL NULL
2012-02-01 00:00:00.000 NULL 500.00 800.00
2012-02-10 00:00:00.000 NULL 700.00 NULL
2012-03-01 00:00:00.000 1100.00 NULL NULL
Dynamic SQL PIVOT
Different approach for creating columns string
create table #temp
(
date datetime,
category varchar(3),
amount money
)
insert into #temp values ('1/1/2012', 'ABC', 1000.00)
insert into #temp values ('2/1/2012', 'DEF', 500.00)
insert into #temp values ('2/1/2012', 'GHI', 800.00)
insert into #temp values ('2/10/2012', 'DEF', 700.00)
insert into #temp values ('3/1/2012', 'ABC', 1100.00)
DECLARE #cols AS NVARCHAR(MAX)='';
DECLARE #query AS NVARCHAR(MAX)='';
SELECT #cols = #cols + QUOTENAME(category) + ',' FROM (select distinct category from #temp ) as tmp
select #cols = substring(#cols, 0, len(#cols)) --trim "," at end
set #query =
'SELECT * from
(
select date, amount, category from #temp
) src
pivot
(
max(amount) for category in (' + #cols + ')
) piv'
execute(#query)
drop table #temp
Result
date ABC DEF GHI
2012-01-01 00:00:00.000 1000.00 NULL NULL
2012-02-01 00:00:00.000 NULL 500.00 800.00
2012-02-10 00:00:00.000 NULL 700.00 NULL
2012-03-01 00:00:00.000 1100.00 NULL NULL
I know this question is older but I was looking thru the answers and thought that I might be able to expand on the "dynamic" portion of the problem and possibly help someone out.
First and foremost I built this solution to solve a problem a couple of coworkers were having with inconstant and large data sets needing to be pivoted quickly.
This solution requires the creation of a stored procedure so if that is out of the question for your needs please stop reading now.
This procedure is going to take in the key variables of a pivot statement to dynamically create pivot statements for varying tables, column names and aggregates. The Static column is used as the group by / identity column for the pivot(this can be stripped out of the code if not necessary but is pretty common in pivot statements and was necessary to solve the original issue), the pivot column is where the end resultant column names will be generated from, and the value column is what the aggregate will be applied to. The Table parameter is the name of the table including the schema (schema.tablename) this portion of the code could use some love because it is not as clean as I would like it to be. It worked for me because my usage was not publicly facing and sql injection was not a concern. The Aggregate parameter will accept any standard sql aggregate 'AVG', 'SUM', 'MAX' etc. The code also defaults to MAX as an aggregate this is not necessary but the audience this was originally built for did not understand pivots and were typically using max as an aggregate.
Lets start with the code to create the stored procedure. This code should work in all versions of SSMS 2005 and above but I have not tested it in 2005 or 2016 but I can not see why it would not work.
create PROCEDURE [dbo].[USP_DYNAMIC_PIVOT]
(
#STATIC_COLUMN VARCHAR(255),
#PIVOT_COLUMN VARCHAR(255),
#VALUE_COLUMN VARCHAR(255),
#TABLE VARCHAR(255),
#AGGREGATE VARCHAR(20) = null
)
AS
BEGIN
SET NOCOUNT ON;
declare #AVAIABLE_TO_PIVOT NVARCHAR(MAX),
#SQLSTRING NVARCHAR(MAX),
#PIVOT_SQL_STRING NVARCHAR(MAX),
#TEMPVARCOLUMNS NVARCHAR(MAX),
#TABLESQL NVARCHAR(MAX)
if isnull(#AGGREGATE,'') = ''
begin
SET #AGGREGATE = 'MAX'
end
SET #PIVOT_SQL_STRING = 'SELECT top 1 STUFF((SELECT distinct '', '' + CAST(''[''+CONVERT(VARCHAR,'+ #PIVOT_COLUMN+')+'']'' AS VARCHAR(50)) [text()]
FROM '+#TABLE+'
WHERE ISNULL('+#PIVOT_COLUMN+','''') <> ''''
FOR XML PATH(''''), TYPE)
.value(''.'',''NVARCHAR(MAX)''),1,2,'' '') as PIVOT_VALUES
from '+#TABLE+' ma
ORDER BY ' + #PIVOT_COLUMN + ''
declare #TAB AS TABLE(COL NVARCHAR(MAX) )
INSERT INTO #TAB EXEC SP_EXECUTESQL #PIVOT_SQL_STRING, #AVAIABLE_TO_PIVOT
SET #AVAIABLE_TO_PIVOT = (SELECT * FROM #TAB)
SET #TEMPVARCOLUMNS = (SELECT replace(#AVAIABLE_TO_PIVOT,',',' nvarchar(255) null,') + ' nvarchar(255) null')
SET #SQLSTRING = 'DECLARE #RETURN_TABLE TABLE ('+#STATIC_COLUMN+' NVARCHAR(255) NULL,'+#TEMPVARCOLUMNS+')
INSERT INTO #RETURN_TABLE('+#STATIC_COLUMN+','+#AVAIABLE_TO_PIVOT+')
select * from (
SELECT ' + #STATIC_COLUMN + ' , ' + #PIVOT_COLUMN + ', ' + #VALUE_COLUMN + ' FROM '+#TABLE+' ) a
PIVOT
(
'+#AGGREGATE+'('+#VALUE_COLUMN+')
FOR '+#PIVOT_COLUMN+' IN ('+#AVAIABLE_TO_PIVOT+')
) piv
SELECT * FROM #RETURN_TABLE'
EXEC SP_EXECUTESQL #SQLSTRING
END
Next we will get our data ready for the example. I have taken the data example from the accepted answer with the addition of a couple of data elements to use in this proof of concept to show the varied outputs of the aggregate change.
create table temp
(
date datetime,
category varchar(3),
amount money
)
insert into temp values ('1/1/2012', 'ABC', 1000.00)
insert into temp values ('1/1/2012', 'ABC', 2000.00) -- added
insert into temp values ('2/1/2012', 'DEF', 500.00)
insert into temp values ('2/1/2012', 'DEF', 1500.00) -- added
insert into temp values ('2/1/2012', 'GHI', 800.00)
insert into temp values ('2/10/2012', 'DEF', 700.00)
insert into temp values ('2/10/2012', 'DEF', 800.00) -- addded
insert into temp values ('3/1/2012', 'ABC', 1100.00)
The following examples show the varied execution statements showing the varied aggregates as a simple example. I did not opt to change the static, pivot, and value columns to keep the example simple. You should be able to just copy and paste the code to start messing with it yourself
exec [dbo].[USP_DYNAMIC_PIVOT] 'date','category','amount','dbo.temp','sum'
exec [dbo].[USP_DYNAMIC_PIVOT] 'date','category','amount','dbo.temp','max'
exec [dbo].[USP_DYNAMIC_PIVOT] 'date','category','amount','dbo.temp','avg'
exec [dbo].[USP_DYNAMIC_PIVOT] 'date','category','amount','dbo.temp','min'
This execution returns the following data sets respectively.
Updated version for SQL Server 2017 using STRING_AGG function to construct the pivot column list:
create table temp
(
date datetime,
category varchar(3),
amount money
);
insert into temp values ('20120101', 'ABC', 1000.00);
insert into temp values ('20120201', 'DEF', 500.00);
insert into temp values ('20120201', 'GHI', 800.00);
insert into temp values ('20120210', 'DEF', 700.00);
insert into temp values ('20120301', 'ABC', 1100.00);
DECLARE #cols AS NVARCHAR(MAX),
#query AS NVARCHAR(MAX);
SET #cols = (SELECT STRING_AGG(category,',') FROM (SELECT DISTINCT category FROM temp WHERE category IS NOT NULL)t);
set #query = 'SELECT date, ' + #cols + ' from
(
select date
, amount
, category
from temp
) x
pivot
(
max(amount)
for category in (' + #cols + ')
) p ';
execute(#query);
drop table temp;
There's my solution cleaning up the unnecesary null values
DECLARE #cols AS NVARCHAR(MAX),
#maxcols AS NVARCHAR(MAX),
#query AS NVARCHAR(MAX)
select #cols = STUFF((SELECT ',' + QUOTENAME(CodigoFormaPago)
from PO_FormasPago
order by CodigoFormaPago
FOR XML PATH(''), TYPE
).value('.', 'NVARCHAR(MAX)')
,1,1,'')
select #maxcols = STUFF((SELECT ',MAX(' + QUOTENAME(CodigoFormaPago) + ') as ' + QUOTENAME(CodigoFormaPago)
from PO_FormasPago
order by CodigoFormaPago
FOR XML PATH(''), TYPE
).value('.', 'NVARCHAR(MAX)')
,1,1,'')
set #query = 'SELECT CodigoProducto, DenominacionProducto, ' + #maxcols + '
FROM
(
SELECT
CodigoProducto, DenominacionProducto,
' + #cols + ' from
(
SELECT
p.CodigoProducto as CodigoProducto,
p.DenominacionProducto as DenominacionProducto,
fpp.CantidadCuotas as CantidadCuotas,
fpp.IdFormaPago as IdFormaPago,
fp.CodigoFormaPago as CodigoFormaPago
FROM
PR_Producto p
LEFT JOIN PR_FormasPagoProducto fpp
ON fpp.IdProducto = p.IdProducto
LEFT JOIN PO_FormasPago fp
ON fpp.IdFormaPago = fp.IdFormaPago
) xp
pivot
(
MAX(CantidadCuotas)
for CodigoFormaPago in (' + #cols + ')
) p
) xx
GROUP BY CodigoProducto, DenominacionProducto'
t #query;
execute(#query);
The below code provides the results which replaces NULL to zero in the output.
Table creation and data insertion:
create table test_table
(
date nvarchar(10),
category char(3),
amount money
)
insert into test_table values ('1/1/2012','ABC',1000.00)
insert into test_table values ('2/1/2012','DEF',500.00)
insert into test_table values ('2/1/2012','GHI',800.00)
insert into test_table values ('2/10/2012','DEF',700.00)
insert into test_table values ('3/1/2012','ABC',1100.00)
Query to generate the exact results which also replaces NULL with zeros:
DECLARE #DynamicPivotQuery AS NVARCHAR(MAX),
#PivotColumnNames AS NVARCHAR(MAX),
#PivotSelectColumnNames AS NVARCHAR(MAX)
--Get distinct values of the PIVOT Column
SELECT #PivotColumnNames= ISNULL(#PivotColumnNames + ',','')
+ QUOTENAME(category)
FROM (SELECT DISTINCT category FROM test_table) AS cat
--Get distinct values of the PIVOT Column with isnull
SELECT #PivotSelectColumnNames
= ISNULL(#PivotSelectColumnNames + ',','')
+ 'ISNULL(' + QUOTENAME(category) + ', 0) AS '
+ QUOTENAME(category)
FROM (SELECT DISTINCT category FROM test_table) AS cat
--Prepare the PIVOT query using the dynamic
SET #DynamicPivotQuery =
N'SELECT date, ' + #PivotSelectColumnNames + '
FROM test_table
pivot(sum(amount) for category in (' + #PivotColumnNames + ')) as pvt';
--Execute the Dynamic Pivot Query
EXEC sp_executesql #DynamicPivotQuery
OUTPUT :
A version of Taryn's answer with performance improvements:
Data
CREATE TABLE dbo.Temp
(
[date] datetime NOT NULL,
category nchar(3) NOT NULL,
amount money NOT NULL,
INDEX [CX dbo.Temp date] CLUSTERED ([date]),
INDEX [IX dbo.Temp category] NONCLUSTERED (category)
);
INSERT dbo.Temp
([date], category, amount)
VALUES
({D '2012-01-01'}, N'ABC', $1000.00),
({D '2012-01-02'}, N'DEF', $500.00),
({D '2012-01-02'}, N'GHI', $800.00),
({D '2012-02-10'}, N'DEF', $700.00),
({D '2012-03-01'}, N'ABC', $1100.00);
Dynamic pivot
DECLARE
#Delimiter nvarchar(4000) = N',',
#DelimiterLength bigint,
#Columns nvarchar(max),
#Query nvarchar(max);
SET #DelimiterLength = LEN(REPLACE(#Delimiter, SPACE(1), N'#'));
-- Before SQL Server 2017
SET #Columns =
STUFF
(
(
SELECT
[text()] = #Delimiter,
[text()] = QUOTENAME(T.category)
FROM dbo.Temp AS T
WHERE T.category IS NOT NULL
GROUP BY T.category
ORDER BY T.category
FOR XML PATH (''), TYPE
)
.value(N'text()[1]', N'nvarchar(max)'),
1, #DelimiterLength, SPACE(0)
);
-- Alternative for SQL Server 2017+ and database compatibility level 110+
SELECT #Columns =
STRING_AGG(CONVERT(nvarchar(max), QUOTENAME(T.category)), N',')
WITHIN GROUP (ORDER BY T.category)
FROM
(
SELECT T2.category
FROM dbo.Temp AS T2
WHERE T2.category IS NOT NULL
GROUP BY T2.category
) AS T;
IF #Columns IS NOT NULL
BEGIN
SET #Query =
N'SELECT [date], ' +
#Columns +
N'
FROM
(
SELECT [date], amount, category
FROM dbo.Temp
) AS S
PIVOT
(
MAX(amount)
FOR category IN (' +
#Columns +
N')
) AS P;';
EXECUTE sys.sp_executesql #Query;
END;
Execution plans
Results
date
ABC
DEF
GHI
2012-01-01 00:00:00.000
1000.00
NULL
NULL
2012-01-02 00:00:00.000
NULL
500.00
800.00
2012-02-10 00:00:00.000
NULL
700.00
NULL
2012-03-01 00:00:00.000
1100.00
NULL
NULL
CREATE TABLE #PivotExample(
[ID] [nvarchar](50) NULL,
[Description] [nvarchar](50) NULL,
[ClientId] [smallint] NOT NULL,
)
GO
INSERT #PivotExample ([ID],[Description], [ClientId]) VALUES ('ACI1','ACI1Desc1',1008)
INSERT #PivotExample ([ID],[Description], [ClientId]) VALUES ('ACI1','ACI1Desc2',2000)
INSERT #PivotExample ([ID],[Description], [ClientId]) VALUES ('ACI1','ACI1Desc3',3000)
INSERT #PivotExample ([ID],[Description], [ClientId]) VALUES ('ACI1','ACI1Desc4',4000)
INSERT #PivotExample ([ID],[Description], [ClientId]) VALUES ('ACI2','ACI2Desc1',5000)
INSERT #PivotExample ([ID],[Description], [ClientId]) VALUES ('ACI2','ACI2Desc2',6000)
INSERT #PivotExample ([ID],[Description], [ClientId]) VALUES ('ACI2','ACI2Desc3', 7000)
SELECT * FROM #PivotExample
--Declare necessary variables
DECLARE #SQLQuery AS NVARCHAR(MAX)
DECLARE #PivotColumns AS NVARCHAR(MAX)
--Get unique values of pivot column
SELECT #PivotColumns= COALESCE(#PivotColumns + ',','') + QUOTENAME([Description])
FROM (SELECT DISTINCT [Description] FROM [dbo].#PivotExample) AS PivotExample
--SELECT #PivotColumns
--Create the dynamic query with all the values for
--pivot column at runtime
SET #SQLQuery =
N' -- Your pivoted result comes here
SELECT ID, ' + #PivotColumns + '
FROM
(
-- Source table should in a inner query
SELECT ID,[Description],[ClientId]
FROM #PivotExample
)AS P
PIVOT
(
-- Select the values from derived table P
SUM(ClientId)
FOR [Description] IN (' + #PivotColumns + ')
)AS PVTTable'
--SELECT #SQLQuery
--Execute dynamic query
EXEC sp_executesql #SQLQuery
Drop table #PivotExample
Fully generic way that will work in non-traditional MS SQL environments (e.g. Azure Synapse Analytics Serverless SQL Pools) - it's in a SPROC but no need to use as such...
-- DROP PROCEDURE IF EXISTS
if object_id('dbo.usp_generic_pivot') is not null
DROP PROCEDURE dbo.usp_generic_pivot
GO;
CREATE PROCEDURE dbo.usp_generic_pivot (
#source NVARCHAR (100), -- table or view object name
#pivotCol NVARCHAR (100), -- the column to pivot
#pivotAggCol NVARCHAR (100), -- the column with the values for the pivot
#pivotAggFunc NVARCHAR (20), -- the aggregate function to apply to those values
#leadCols NVARCHAR (100) -- comma seprated list of other columns to keep and order by
)
AS
BEGIN
DECLARE #pivotedColumns NVARCHAR(MAX)
DECLARE #tsql NVARCHAR(MAX)
SET #tsql = CONCAT('SELECT #pivotedColumns = STRING_AGG(qname, '','') FROM (SELECT DISTINCT QUOTENAME(', #pivotCol,') AS qname FROM ',#source, ') AS qnames')
EXEC sp_executesql #tsql, N'#pivotedColumns nvarchar(max) out', #pivotedColumns out
SET #tsql = CONCAT ( 'SELECT ', #leadCols, ',', #pivotedColumns,' FROM ',' ( SELECT ',#leadCols,',',
#pivotAggCol,',', #pivotCol, ' FROM ', #source, ') as t ',
' PIVOT (', #pivotAggFunc, '(', #pivotAggCol, ')',' FOR ', #pivotCol,
' IN (', #pivotedColumns,')) as pvt ',' ORDER BY ', #leadCols)
EXEC (#tsql)
END
GO;
-- TEST EXAMPLE
EXEC dbo.usp_generic_pivot
#source = '[your_db].[dbo].[form_answers]',
#pivotCol = 'question',
#pivotAggCol = 'answer',
#pivotAggFunc = 'MAX',
#leadCols = 'candidate_id, candidate_name'
GO;
I am trying to generate a pivot table with dynamic column names, but failing miserably.
My table has the following structure:
id, int() PKEY
prod_no, VARCHAR(20)
f_month, INT
f_year, INT
f_value, INT
with sample data looking like this
-------------------
AB1234|1|2016|15698
-------------------
AB1234|2|2016|25438
-------------------
AB1234|3|2016|53323
-------------------
AB1234|1|2017|34535
-------------------
AB1234|2|2017|66244
-------------------
AB1234|3|2017|54534
-------------------
CD9876|1|2016|43278
-------------------
CD9876|2|2016|11245
-------------------
CD9876|3|2016|82432
-------------------
CD9876|1|2017|93563
-------------------
CD9876|2|2017|89356
-------------------
CD9876|3|2017|45724
-------------------
the result I'm after is something like this:
prod_no|1-2016|2-2016|3-2016|1-2017|2-2017|3-2017|
--------------------------------------------------
AB1234 |15698 |25438 |53323 |34535 |66244 |54534 |
--------------------------------------------------
CD9876 |43278 |11245 |82432 |93563 |89356 |45724 |
So the columns as prod_no, followed by dynamic columns being concatenation of f_month-f_year
an the data as product number and value corresponding to the month-year in that column.
I played around with some dynamic pivot examples from the web but so far no luck with getting this to work
Try this:
DECLARE #cols AS NVARCHAR(MAX),
#query AS NVARCHAR(MAX);
SET #cols = STUFF((SELECT distinct ',' + QUOTENAME(convert(varchar,c.f_month)+'-'+convert(varchar,c.f_year))
FROM dynpi c
FOR XML PATH(''), TYPE
).value('.', 'NVARCHAR(MAX)')
,1,1,'')
print #cols
set #query = 'SELECT prod_no,' + #cols + ' from
(
select prod_no, f_value,convert(varchar,f_month)+''-''+convert(varchar,f_year) as dyn
from dynpi
) x
pivot
(
max(f_value)
for dyn in (' + #cols + ')
) p '
execute(#query)
The result is:
*---------*---------*-------*-------*-------*-------*------*
|prod_no |1-2016 |1-2017 |2-2016 |2-2017 |3-2016 |3-2017|
*---------*---------*-------*-------*-------*-------*------*
|AB1234 |15698 |34535 |25438 |66244 |53323 |54534 |
*---------*---------*-------*-------*-------*-------*------*
|CD9876 |43278 |93563 |11245 |89356 |82432 |45724 |
*---------*---------*-------*-------*-------*-------*------*
This will maintain the desired column sequence
Example
Declare #SQL varchar(max) = '
Select *
From (
Select prod_no
,item = concat(f_year,''-'',f_month)
,value = f_value
From YourTable
) A
Pivot (sum([value]) For [Item] in (' + Stuff((Select ','+QuoteName(concat(f_year,'-',f_month))
From (Select Distinct Top 100 f_year,f_month From YourTable Order By f_Year,f_month ) A
For XML Path('')),1,1,'') + ') ) p'
Exec(#SQL)
--Print #SQL
Returns
This is a T-SQL related question. I am using SQL Server 2012.
I have a table like this:
I would like to have output like this:
Explanation:
For each employee, there will be a row. An employee has one or more assignments. Batch Id specifies this. Based on the batch Id, the column names will change (e.g. Country 1, Country 2 etc.).
Approach so far:
Un-pivot the source table like the following:
select
EmpId, 'Country ' + cast(BatchId as varchar) as [ColumnName],
Country as [ColumnValue]
from
SourceTable
UNION
select
EmpId, 'Pass ' + cast(BatchId as varchar) as [ColumnName],
Pass as [ColumnValue]
from
SourceTable
which gives each column's values as rows. Then, this result can be pivoted to get the desired output.
Questions:
Is there a better way of doing this?
At the moment, I know there will be fixed amount of batches, but, for future, if I like to make the pivoting part dynamic, what is the best approach?
Using tools like SSIS or SSRS, is it easier to handle the pivot dynamically?
Screw doing it in SQL.
Let SSRS do the work for you with a MATRIX. It will PIVOT for you without having to create dynamic SQL to handle the terrible limitation of needing to know all the columns.
For your data, you would have EMP ID as the ROW Group and PASS as your column grouping.
https://msdn.microsoft.com/en-us/library/dd207149.aspx
There are many possible solutions to achieve what you want (search for Dynamic Pivot on multiple columns)
SqlFiddleDemo
Warning: I assume that columns Country and Pass are NOT NULL
CREATE TABLE SourceTable(EmpId INT, BatchId INT,
Country NVARCHAR(100) NOT NULL, Pass NVARCHAR(5) NOT NULL);
INSERT INTO SourceTable(EmpId, BatchId, Country, Pass)
VALUES
(100, 1, 'UK', 'M'), (200, 2, 'USA', 'U'),
(100, 2, 'Romania', 'M'), (100, 3, 'India', 'MA'),
(100, 4, 'Hongkong', 'MA'), (300, 1, 'Belgium', 'U'),
(300, 2, 'Poland', 'U'), (200, 1, 'Australia', 'M');
/* Get Number of Columns Groups Country1..Country<MaxCount> */
DECLARE #max_count INT
,#sql NVARCHAR(MAX) = ''
,#columns NVARCHAR(MAX) = ''
,#i INT = 0
,#i_s NVARCHAR(10);
WITH cte AS
(
SELECT EmpId
,[cnt] = COUNT(*)
FROM SourceTable
GROUP BY EmpId
)
SELECT #max_count = MAX(cnt)
FROM cte;
WHILE #i < #max_count
BEGIN
SET #i += 1;
SET #i_s = CAST(#i AS NVARCHAR(10));
SET #columns += N',MAX(CASE WHEN [row_no] = ' + #i_s + ' THEN Country END) AS Country' + #i_s +
',MAX(CASE WHEN [row_no] = ' + #i_s + ' THEN Pass END) AS Pass' + #i_s;
END
SELECT #sql =
N';WITH cte AS (
SELECT EmpId, Country, Pass, [row_no] = ROW_NUMBER() OVER (PARTITION BY EmpId ORDER BY BatchId)
FROM SourceTable)
SELECT EmpId ' + #columns + N'
FROM cte
GROUP BY EmpId';
/* Debug */
/* SELECT #sql */
EXEC(#sql);
Or:
SQLFiddleDemo2
DECLARE #cols NVARCHAR(MAX),
#sql NVARCHAR(MAX) = '';
;WITH cte(col_name, rn) AS(
SELECT DISTINCT col_name = col_name + CAST(BatchId AS VARCHAR(10)),
rn = ROW_NUMBER() OVER(PARTITION BY EmpId ORDER BY BatchId)
FROM SourceTable
CROSS APPLY (VALUES ('Country', Country), ('Pass', Pass)) AS c(col_name, val)
)
SELECT #cols = STUFF((SELECT ',' + QUOTENAME(col_name)
FROM cte
ORDER BY rn /* If column order is important for you */
FOR XML PATH(''), TYPE
).value('.', 'NVARCHAR(MAX)')
, 1, 1, '');
SET #sql =
N';WITH cte AS
(
SELECT EmpId, col_name = col_name + CAST(BatchId AS VARCHAR(10)), val
FROM SourceTable
CROSS APPLY (VALUES (''Country'', Country), (''Pass'', Pass)) AS c(col_name, val)
)
SELECT *
FROM cte
PIVOT
(
MAX(val)
FOR col_name IN (' + #cols + ')
) piv';
EXEC(#sql);
I'm useing SQL Ser 2008 and have a large table with only one column of data. The data is a random string with very little consistency. Eample: Name Account 445566 0010020056893010445478008 AFD 369. I've been working with a split function that a stackoverflow user suggested. It works great but the function assigns the split string into one column. I need a row of individual columns. The present result is 1col with values Name, Account, 445566,... in it but the result I'm looking for is col1 Name, col2 Account, col3 445566,...
If anyone could provide some insight on how to tailor this script or its usage to get the desired result it would be much appreciated.
CREATE FUNCTION [dbo].[Split]
(
#String varchar(max)
,#Delimiter char
)
RETURNS #Results table
(
Ordinal int
,StringValue varchar(max)
)
as
begin
set #String = isnull(#String,'')
set #Delimiter = isnull(#Delimiter,'')
declare
#TempString varchar(max) = #String
,#Ordinal int = 0
,#CharIndex int = 0
set #CharIndex = charindex(#Delimiter, #TempString)
while #CharIndex != 0 begin
set #Ordinal += 1
insert #Results values
(
#Ordinal
,substring(#TempString, 0, #CharIndex)
)
set #TempString = substring(#TempString, #CharIndex + 1, len(#TempString) - #CharIndex)
set #CharIndex = charindex(#Delimiter, #TempString)
end
if #TempString != '' begin
set #Ordinal += 1
insert #Results values
(
#Ordinal
,#TempString
)
end
return
end
--The usage:
SELECT
*
FROM
mytable M
CROSS APPLY
[dbo].[Split] (M.TheColumn, ' ') S
Where rtrim(s.StringValue) != ''
If you know that you have 6 columns in the string you can use a split functions that looks like this and of course modify the function to whatever number of columns you want. A function can not return a dynamic number of columns.
create function dbo.Split6(#String varchar(max), #Delimiter char(1))
returns table as return
(
select
substring(T.Col, 1, S1.Pos-1) as Col1,
substring(T.Col, S1.Pos+1, S2.Pos-S1.Pos-1) as Col2,
substring(T.Col, S2.Pos+1, S3.Pos-S2.Pos-1) as Col3,
substring(T.Col, S3.Pos+1, S4.Pos-S3.Pos-1) as Col4,
substring(T.Col, S4.Pos+1, S5.Pos-S4.Pos-1) as Col5,
substring(T.Col, S5.Pos+1, S6.Pos-S5.Pos-1) as Col6
from (select #String+replicate(#Delimiter, 6)) as T(Col)
cross apply (select charindex(#Delimiter, T.Col, 1)) as S1(Pos)
cross apply (select charindex(#Delimiter, T.Col, S1.Pos+1)) as S2(Pos)
cross apply (select charindex(#Delimiter, T.Col, S2.Pos+1)) as S3(Pos)
cross apply (select charindex(#Delimiter, T.Col, S3.Pos+1)) as S4(Pos)
cross apply (select charindex(#Delimiter, T.Col, S4.Pos+1)) as S5(Pos)
cross apply (select charindex(#Delimiter, T.Col, S5.Pos+1)) as S6(Pos)
)
Test:
declare #T table (Col varchar(100))
insert into #T values
('Name Account 445566 0010020056893010445478008 AFD 369'),
(''),
('1 2'),
('1 3')
select S.Col1, S.Col2, S.Col3, S.Col4, S.Col5, S.Col6
from #T as T
cross apply
dbo.Split6(T.Col, ' ') as S
Result:
Col1 Col2 Col3 Col4 Col5 Col6
---- ------- ------ ------------------------- ---- ----
Name Account 445566 0010020056893010445478008 AFD 369
1 2
1 3
You might try using a PIVOT.
http://msdn.microsoft.com/en-us/library/ms177410.aspx
I have this statement in T-SQL.
SELECT Bay From TABLE where uid in (
select B_Numbers from Info_Step WHERE uid = 'number'
)
I am selecting "multiple" BAYs from TABLE where their uid is equal to a string of numbers like this:
B_Numbers = 1:45:34:98
Therefore, I should be selecting 4 different BAYs from TABLE. I basically need to split the string 1:45:34:98 up into 4 different numbers.
I'm thinking that Split() would work, but it doesn't and I get a syntax error.
Any thoughts from the T-SQL gods would be awesome!
Here is an implementation of a split function that returns the list of numbers as a table:
http://rbgupta.blogspot.com/2007/03/split-function-tsql.html
Looks like this would set you on your way...
Here is a method that uses an auxiliary numbers table to parse the input string. The logic can easily be added to a function that returns a table. That table can then be joined to lookup the correct rows.
Step 1: Create the Numbers table
SET NOCOUNT ON
GO
IF EXISTS
(
SELECT 1
FROM INFORMATION_SCHEMA.TABLES
WHERE TABLE_NAME = 'Numbers'
AND TABLE_SCHEMA = 'dbo'
AND TABLE_TYPE = 'BASE TABLE'
)
BEGIN
DROP TABLE dbo.Numbers
END
GO
CREATE TABLE dbo.Numbers
(
Number smallint IDENTITY(1, 1) PRIMARY KEY
)
GO
WHILE 1 = 1
BEGIN
INSERT INTO dbo.Numbers DEFAULT VALUES
IF SCOPE_IDENTITY() = 32767
BEGIN
BREAK
END
END
GO
Step 2: Parse the Input String
CREATE FUNCTION dbo.ParseString(#input_string varchar(8000), #delim varchar(8000) = " ")
RETURNS TABLE
AS RETURN
(
SELECT Number
FROM dbo.Numbers
WHERE CHARINDEX
(
#delim + CONVERT(VARCHAR(12),Number) + #delim,
#delim + #input_string + #delim
) > 0
)
GO
**EXAMPLE**
SELECT * FROM dbo.ParseString('1:45:34:98',':')
Step 3: Use the results however you want/need
Number
------
1
34
45
98
End-To-End Example
Create function that returns the appropriate BNumber (of course change it to use the commented out SQL)
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE FUNCTION dbo.GetBNumber (#uid int)
RETURNS VARCHAR(8000)
AS
BEGIN
RETURN '1:45:34:98'
--select B_Numbers from Info_Step WHERE uid = #uid
END
GO
Use the use functions to return the desired results
-- Using Test Data
SELECT N.Number FROM Numbers N
JOIN dbo.ParseString(dbo.GetBNumber(12345),':') Q ON Q.Number = N.Number
-- Using Your Data (Untested but should work.)
SELECT N.Bay
FROM TABLE N
JOIN dbo.ParseString(dbo.GetBNumber(ENTER YOU NUMBER HERE),':') Q ON Q.Number = N.uid
Results
Number
------
1
34
45
98
You should keep your arrays as rows but if I understand your question I think this will work.
SELECT
Bay
From
TABLE
join Info_Step
on B_Numbers like '%'+ uid +'%'
where
Info_Step.uid = 'number'
This query will do a full table scan because of the like operator.
What you can do is loop through the B_Numbers entries and do your own split on : Insert those entries into a temp table and then perform your query.
DECLARE #i int
DECLARE #start int
DECLARE #B_Numbers nvarchar(20)
DECLARE #temp table (
number nvarchar(10)
)
-- SELECT B_Numbers FROM Info_Step WHERE uid = 'number'
SELECT #B_Numbers = '1:45:34:98'
SET #i = 0
SET #start = 0
-- Parse out characters delimited by ":";
-- Would make a nice user defined function.
WHILE #i < len(#B_Numbers)
BEGIN
IF substring(#B_Numbers, #i, 1) = ':'
BEGIN
INSERT INTO #temp
VALUES (substring(#B_Numbers, #start, #i - #start))
SET #start = #i + 1
END
SET #i = #i + 1
END
-- Insert last item
INSERT INTO #temp
VALUES (substring(#B_Numbers, #start, #i - #start + 1))
-- Do query with parsed values
SELECT Bay FROM TABLE WHERE uid in (SELECT * FROM #temp)
You can even try this
declare #str varchar(50)
set #str = '1:45:34:98'
;with numcte as(
select 1 as rn union all select rn+1 from numcte where rn<LEN(#str)),
getchars as(select
ROW_NUMBER() over(order by rn) slno,
rn,chars from numcte
cross apply(select SUBSTRING(#str,rn,1) chars)X where chars = ':')
select top 1
Bay1 = SUBSTRING(#str,0,(select rn from getchars where slno = 1))
,Bay2 = SUBSTRING(#str,
(select rn from getchars where slno = 1) + 1,
(((select rn from getchars where slno = 2)-
(select rn from getchars where slno = 1)
)-1))
,Bay3 = SUBSTRING(#str,
(select rn from getchars where slno = 2) + 1,
(((select rn from getchars where slno = 3)-
(select rn from getchars where slno = 2)
)-1))
,Bay4 = SUBSTRING(#str,
(select rn from getchars where slno = 3)+1,
LEN(#str))
from getchars
Output:
Bay1 Bay2 Bay3 Bay4
1 45 34 98