Related
I have a varchar that contains a formula:
declare #formula varchar(50) = 'X + Y + Z'
and I also have a table:
+---+---+
| A | B |
+---+---+
| X | 1 |
+---+---+
| Y | 2 |
+---+---+
| Z | 3 |
+---+---+
Column A values are unique and the formula may change. For example, if the formula is set to 'X + Y + Z' then the result would be 6. And if the formula is set to 'Z - X + Y' then the result is 4. Operations include only addition and subtraction. How can I achieve this? Having a hard time looking for where to start.
SQL Server does NOT support macro substitution, nor does it have an Eval()... this leaves Dynamic SQL
Example
Declare #YourTable Table ([A] varchar(50),[B] varchar(50))
Insert Into #YourTable Values
('X',1)
,('Y',2)
,('Z',3)
Declare #formula varchar(50) = 'X + Y + Z'
Select #formula=replace(#formula,[A],[B])
From #YourTable
Exec('Select NewValue='+#formula)
Returns
NewValue
6
Just for fun, here is a modified option which will support a TABLE
Example
Declare #YourValues Table ([A] varchar(50),[B] varchar(50))
Insert Into #YourValues Values
('X',1)
,('Y',2)
,('Z',3)
Declare #YourFormula Table (ID int,Formula varchar(50))
Insert Into #YourFormula Values
(1,'X + Y + Z'),
(2,'X - Y + Z')
Declare #SQL varchar(max) = stuff((Select concat(',(',ID,',',Formula,')') From #YourFormula For XML Path ('')),1,1,'')
Select #SQL=replace(#SQL,[A],[B])
From #YourValues
Create Table #TempResults (ID int,Calc money)
Exec('Insert Into #TempResults Select * from (values '+#SQL+')A(ID,Calc)')
Select * from #TempResults
Returns
ID Calc
1 6.00
2 2.00
This is rather crude and only works for +/- operands, however, I believe it satisfies the question.
DECLARE #Formulas TABLE (Formula NVARCHAR(MAX))
INSERT INTO #Formulas SELECT 'Z-X+Y'
DECLARE #Values TABLE(Name NVARCHAR(50), Value DECIMAL(18,2))
INSERT #Values VALUES ('X',1),('Y',2),('Z',3)
;WITH MySplitFormula AS
(
SELECT Value = SUBSTRING(Formula,Number,1) FROM #Formulas
CROSS APPLY (SELECT DISTINCT number FROM master..spt_values WHERE number > 0 AND number <= LEN(Formula))V
)
,NormalizedFormula AS
(
SELECT
DerivedOperations = CASE WHEN F.Value IN('+','-') THEN F.Value ELSE NULL END,
IsOperator = CASE WHEN F.Value IN('+','-') THEN 1 ELSE 0 END,
DerivedValues = CASE WHEN F.Value IN('+','-') THEN NULL ELSE V.Value END
FROM
MySplitFormula F
LEFT OUTER JOIN #Values V ON V.Name = F.Value
WHERE
NOT F.Value IS NULL
),
ValidatedFormula AS
(
SELECT DerivedOperations,DerivedValues FROM NormalizedFormula WHERE NOT((DerivedOperations IS NULL) AND (DerivedValues IS NULL))
),
Operators AS
(
SELECT
OrderIndex=ROW_NUMBER() OVER (ORDER BY (SELECT NULL)),
Operator=DerivedOperations FROM ValidatedFormula WHERE NOT DerivedOperations IS NULL
),
Operands AS
(
SELECT
OrderIndex=ROW_NUMBER() OVER (ORDER BY (SELECT NULL)),
Operand=DerivedValues FROM ValidatedFormula WHERE NOT DerivedValues IS NULL
)
,Marked AS
(
SELECT
OP.OrderIndex,
DoOperation = CASE WHEN OP.OrderIndex % 2 = 1 THEN 1 ELSE 0 END,
Operand1 = Operand,
Operator,
Operand2 = LEAD(Operand) OVER(ORDER BY OP.OrderIndex)
FROM
Operands OP
LEFT OUTER JOIN Operators OPR ON OPR.OrderIndex = OP.OrderIndex
)
,MarkedAgain AS
(
SELECT
*,
CalculatedValue = CASE WHEN DoOperation = 1 THEN
CASE
WHEN Operator = '+' THEN Operand1 + Operand2
WHEN Operator = '-' THEN Operand1 - Operand2
WHEN Operator IS NULL THEN
CASE WHEN LAG(Operator) OVER(ORDER BY OrderIndex) ='+' THEN Operand1 ELSE -Operand1 END
ELSE NULL
END
END
FROM
Marked
)
SELECT SUM(CalculatedValue) FROM MarkedAgain
I have a very long text string being imported into a table. I would like to split the string up; I have a routine to pull the data into a table, but it creates all the data in a single field in a table.
Example Text:
05/10/2018 21:14,#FXAAF00123456,,Cup 1 X Plane,0.00000,OK,Cup 1 Y Plane,0.00000,OK,Cup 1 Z Plane,40.64252,OK,Cup 2 X Plane,77.89434,OK,..etc
(The test string is much longer than this, in the region of 1500-1700 characters, but with the same structure in the rest of the string).
This data is a series of test measurements, with the name of the value, the value, and the OK/NOK indicator.
I want the results to be stored in a table (variable) with three fields, so the data above becomes:
Field1|Field2|Field3
05/10/2018 21:14|#FXAAF00123456|null|
Cup 1 X Plane|0.00000|OK|
Cup 1 Y Plane|0.00000|OK|
Cup 1 Z Plane|40.64252|OK|
Cup 2 X Plane|77.89434|OK|
...etc
I am using this function to split the string into a table variable:
CREATE FUNCTION [dbo].[fnSplitString]
(
#InputString NVARCHAR(MAX),
#Delim VARCHAR(255)
)
RETURNS TABLE
AS
RETURN ( SELECT [Value] FROM
(
SELECT
[Value] = LTRIM(RTRIM(SUBSTRING(#InputString, [Number],
CHARINDEX(#Delim, #InputString + #Delim, [Number]) - [Number])))
FROM (SELECT Number = ROW_NUMBER() OVER (ORDER BY name)
FROM sys.all_objects) AS x
WHERE Number <= LEN(#InputString)
AND SUBSTRING(#Delim + #InputString, [Number], LEN(#Delim)) = #Delim
) AS y
);
How can this be modified to give the output required above?
You can try this tiny inline splitting approach.
DECLARE #s VARCHAR(MAX)='05/10/2018 21:14,#FXAAF00123456,,Cup 1 X Plane,0.00000,OK,Cup 1 Y Plane,0.00000,OK,Cup 1 Z Plane,40.64252,OK,Cup 2 X Plane,77.89434,OK';
;WITH
a AS (SELECT n=0, i=-1, j=0 UNION ALL SELECT n+1, j, CAST(CHARINDEX(',', #s, j+1) AS INT) FROM a WHERE j > i)
,b AS (SELECT n, SUBSTRING(#s, i+1, IIF(j>0, j, LEN(#s)+1)-i-1) s FROM a WHERE i >= 0)
,c AS (SELECT n,(n-1) % 3 AS Position,(n-1)/3 AS RowIndex,s FROM b)
SELECT MAX(CASE WHEN Position=0 THEN s END) AS part1
,MAX(CASE WHEN Position=1 THEN s END) AS part2
,MAX(CASE WHEN Position=2 THEN s END) AS part3
FROM c
GROUP BY RowIndex
OPTION (MAXRECURSION 0);
The result
part1 part2 part3
05/10/2018 21:14 #FXAAF00123456
Cup 1 X Plane 0.00000 OK
Cup 1 Y Plane 0.00000 OK
Cup 1 Z Plane 40.64252 OK
Cup 2 X Plane 77.89434 OK
Hint
You might change your splitter function to the recursive approach above. On the one side you are limited to a string-length of the count in sys.all_objects which might be smaller than your input. On the other side your approach has to test each and any position, while the recursive approach hops from spot to spot. Should be faster...
This could easily be opened for a multi-character-delimiter if needed...
UPDATE another approach without recursion
...which makes it clumsy to be used in a splitter function (due to OPTION MAXRECURSION(0), which must be placed at the end of the query and cannot live within the function). Try it out:
;WITH
a(Casted) AS (SELECT CAST('<x>' + REPLACE((SELECT #s AS [*] FOR XML PATH('')),',','</x><x>') + '</x>' AS XML))
,b(s,RowIndex,Position) AS
(
SELECT x.value(N'text()[1]','nvarchar(max)')
,(ROW_NUMBER() OVER(ORDER BY(SELECT NULL)) -1) /3
,(ROW_NUMBER() OVER(ORDER BY(SELECT NULL)) -1) %3
FROM a
CROSS APPLY Casted.nodes(N'/x') X(x)
)
SELECT RowIndex
,MAX(CASE WHEN Position=0 THEN s END) AS part1
,MAX(CASE WHEN Position=1 THEN s END) AS part2
,MAX(CASE WHEN Position=2 THEN s END) AS part3
FROM b
GROUP BY RowIndex;
Hint:
Using (SELECT #s AS [*] FOR XML PATH('')) will make this approach save with forbidden characters...
this required a small modification to your fnSplitString function. Add a RowNo to identify the original sequence of the delimited item
CREATE FUNCTION [dbo].[fnSplitString]
(
#InputString NVARCHAR(MAX),
#Delim VARCHAR(255)
)
RETURNS TABLE
AS
RETURN ( SELECT [Value] FROM
(
SELECT RowNo = ROW_NUMBER() OVER (ORDER BY Number),
[Value] = LTRIM(RTRIM(SUBSTRING(#InputString, [Number],
CHARINDEX(#Delim, #InputString + #Delim, [Number]) - [Number])))
FROM (SELECT Number = ROW_NUMBER() OVER (ORDER BY name)
FROM sys.all_objects) AS x
WHERE Number <= LEN(#InputString)
AND SUBSTRING(#Delim + #InputString, [Number], LEN(#Delim)) = #Delim
) AS y
);
And with that, you can group every 3 rows as one. Also the RowNo can be used to identify the column
The query
; with tbl as
(
select col = '05/10/2018 21:14,#FXAAF00123456,,Cup 1 X Plane,0.00000,OK,Cup 1 Y Plane,0.00000,OK,Cup 1 Z Plane,40.64252,OK,Cup 2 X Plane,77.89434,OK'
)
select Field1 = MAX(CASE WHEN (RowNo - 1) % 3 = 0 THEN Value END),
Field2 = MAX(CASE WHEN (RowNo - 1) % 3 = 1 THEN Value END),
Field3 = MAX(CASE WHEN (RowNo - 1) % 3 = 2 THEN Value END)
from tbl t
cross apply dbo.fnSplitString (t.col, ',')
group by (RowNo - 1) / 3
Can you try following script after you create the SQL split function given in the reference document.
That split function returns the order of splitted string fragments so that information is used for row data
declare #str nvarchar(max) = '05/10/2018 21:14,#FXAAF00123456,,Cup 1 X Plane,0.00000,OK,Cup 1 Y Plane,0.00000,OK,Cup 1 Z Plane,40.64252,OK,Cup 2 X Plane,77.89434,OK'
select
floor(id / 3)+1 rn,
case when id % 3 = 1 then val end Field1,
case when id % 3 = 2 then val end Field2,
case when id % 3 = 0 then val end Field3
from dbo.Split(#str,',')
select
rn,
max(Field1) Field1,
max(Field2) Field2,
max(Field3) Field3
from (
select
floor((id-1) / 3)+1 rn,
case when id % 3 = 1 then val end Field1,
case when id % 3 = 2 then val end Field2,
case when id % 3 = 0 then val end Field3
from dbo.Split(#str,',')
) t
group by rn
I need to split a string in a column into one character each into it's own column in SQL Server 2012.
Example: if I have a column with 'ABCDE', I need to split it into 'A', 'B', 'C', 'D', 'E', with each of these into their own columns.
The length of the column to be split may vary, so I need this to be as dynamic as possible.
My question is different from the other post (Can Mysql Split a column?) since mine doesn't have any delimiters.
Thanks
You can do this like this:
DECLARE #t TABLE(id int, n VARCHAR(50))
INSERT INTO #t VALUES
(1, 'ABCDEF'),
(2, 'EFGHIJKLMNOPQ')
;WITH cte AS
(SELECT id, n, SUBSTRING(n, 1, 1) c, 1 AS ind FROM #t
UNION ALL
SELECT id, n, SUBSTRING(n, ind + 1, 1), ind + 1 FROM cte WHERE LEN(n) > ind
)
SELECT *
FROM cte
PIVOT (MAX(c) FOR ind IN([1],[2],[3],[4],[5],[6],[7],[8],[9],[10],[12],[13],[14],[15])) p
Output:
id n 1 2 3 4 5 6 7 8 9 10 12 13 14 15
1 ABCDEF A B C D E F NULL NULL NULL NULL NULL NULL NULL NULL
2 EFGHIJKLMNOPQ E F G H I J K L M N P Q NULL NULL
Here is dynamic version:
DECLARE #l INT, #c VARCHAR(MAX) = ''
SELECT #l = MAX(LEN(n)) FROM PivotTable
WHILE #l > 0
BEGIN
SET #c = ',[' + CAST(#l AS VARCHAR(MAX)) + ']' + #c
SET #l = #l - 1
END
SET #c = STUFF(#c, 1, 1,'')
DECLARE #s NVARCHAR(MAX) = '
;WITH cte AS
(SELECT id, n, SUBSTRING(n, 1, 1) c, 1 AS ind FROM PivotTable
UNION ALL
SELECT id, n, SUBSTRING(n, ind + 1, 1), ind + 1 FROM cte WHERE LEN(n) > ind
)
SELECT *
FROM cte
PIVOT (MAX(c) FOR ind IN(' + #c + ')) p'
EXEC (#s)
I am interpreting the question as putting the characters into one column ("split a string in a column into one character each into it's own column"). However, I realize that this might be ambiguous.
One method is with a recursive CTE:
with chars as (
select left(val, 1) as c, substring(val, 2, len(val)) as rest
from (select 'ABCDE' as val union all select '123') t
union all
select left(rest, 1), substring(rest, 2, len(rest))
from chars
where rest <> ''
)
select c
from chars;
Just plug in your table and column in the subquery. Note that you might want to include other columns as well.
Here is a SQL Fiddle.
If you want multiple columns and the number is not fixed, then you will need
dynamic SQL.
If you want a new column for every character you simply need:
SELECT [1] = SUBSTRING(Col, 1, 1),
[2] = SUBSTRING(Col, 2, 1),
[3] = SUBSTRING(Col, 3, 1),
[4] = SUBSTRING(Col, 4, 1),
[5] = SUBSTRING(Col, 5, 1),
[6] = SUBSTRING(Col, 6, 1),
[7] = SUBSTRING(Col, 7, 1),
[8] = SUBSTRING(Col, 8, 1),
[9] = SUBSTRING(Col, 9, 1)
FROM (VALUES ('ABCDE'), ('FGHIJKLMN')) t (Col);
Which is fine, if you have a know number of columns. If you have an unknown number of columns, then you just need to generate the same SQL with n columns. To do this you will need a numbers table, and since many people do not have one, I will do a quick demo on how to dynamically generate one.
The below will generate a sequential list of numbers, 1 - 100,000,000.
WITH N1 AS (SELECT N FROM (VALUES (1),(1),(1),(1),(1),(1),(1),(1),(1),(1)) n (N)),
N2 (N) AS (SELECT 1 FROM N1 AS N1 CROSS JOIN N1 AS N2),
N3 (N) AS (SELECT 1 FROM N2 AS N1 CROSS JOIN N2 AS N2),
Numbers (Number) AS (SELECT ROW_NUMBER() OVER(ORDER BY N1.N) FROM N3 AS N1 CROSS JOIN N3 AS N2)
SELECT Number
FROM Numbers;
It simply uses a table valued constructor to generate 10 rows (N1), then cross joins these 10 rows to get 100 rows (N2), then cross joins these 100 rows to get 10,000 rows (N3) and so on and so on. It finally uses ROW_NUMBER() to get the sequential numbers.
This probably needs to be cut down for this use, I hope you are not splitting a string that is 100,000,000 characters long, but the principle applies. You can just use TOP and the maximum length of your string to limit it. For each number you can just build up the necessary repetetive SQL required, which is:
,[n] = SUBSTRING(Col, n, 1)
So you have something like:
SELECT Number,
[SQL] = ',[' + CAST(Number AS VARCHAR(10)) + '] = SUBSTRING(Col, ' + CAST(Number AS VARCHAR(10)) + ', 1)'
FROM Numbers;
Which gives something like:
Number SQL
-----------------------------------
1 ,[1] = SUBSTRING(Col, 1, 1)
2 ,[2] = SUBSTRING(Col, 2, 1)
3 ,[3] = SUBSTRING(Col, 3, 1)
4 ,[4] = SUBSTRING(Col, 4, 1)
The final step is to build up your final statement by concatenating all the text in the column SQL; the best way to do this is using SQL Server's XML Extensions.
So your final query might end up like:
DECLARE #SQL NVARCHAR(MAX) = '';
IF OBJECT_ID(N'tempdb..#T', 'U') IS NOT NULL DROP TABLE #T;
CREATE TABLE #T (Col VARCHAR(100));
INSERT #T (Col) VALUES ('ABCDE'), ('FGHIJKLMN');
WITH N1 AS (SELECT N FROM (VALUES (1),(1),(1),(1),(1),(1),(1),(1),(1),(1)) n (N)),
N2 (N) AS (SELECT 1 FROM N1 AS N1 CROSS JOIN N1 AS N2),
N3 (N) AS (SELECT 1 FROM N2 AS N1 CROSS JOIN N2 AS N2),
Numbers (Number) AS (SELECT ROW_NUMBER() OVER(ORDER BY N1.N) FROM N3 AS N1 CROSS JOIN N3 AS N2)
SELECT #SQL = 'SELECT Col' +
( SELECT TOP (SELECT MAX(LEN(Col)) FROM #T)
',[' + CAST(Number AS VARCHAR(10)) + '] = SUBSTRING(Col, ' + CAST(Number AS VARCHAR(10)) + ', 1)'
FROM Numbers
FOR XML PATH(''), TYPE
).value('.', 'VARCHAR(MAX)') + '
FROM #T;';
EXECUTE sp_executesql #SQL;
Which gives:
Col 1 2 3 4 5 6 7 8 9
-------------------------------------------------
ABCDE A B C D E
FGHIJKLMN F G H I J K L M N
Finally, if you actually wanted to split it into rows, I would still use the same approach, with your adhoc numbers table, just join it to your original table:
IF OBJECT_ID(N'tempdb..#T', 'U') IS NOT NULL DROP TABLE #T;
CREATE TABLE #T (Col VARCHAR(100));
INSERT #T (Col) VALUES ('ABCDE'), ('FGHIJKLMN');
WITH N1 AS (SELECT N FROM (VALUES (1),(1),(1),(1),(1),(1),(1),(1),(1),(1)) n (N)),
N2 (N) AS (SELECT 1 FROM N1 AS N1 CROSS JOIN N1 AS N2),
N3 (N) AS (SELECT 1 FROM N2 AS N1 CROSS JOIN N2 AS N2),
Numbers (Number) AS (SELECT TOP (SELECT MAX(LEN(Col)) FROM #T) ROW_NUMBER() OVER(ORDER BY N1.N) FROM N3 AS N1 CROSS JOIN N3 AS N2)
SELECT t.Col,
Position = n.Number,
Character = SUBSTRING(t.Col, n.Number, 1)
FROM #T AS t
INNER JOIN Numbers AS n
ON n.Number <= LEN(t.Col)
ORDER BY t.Col, n.Number;
Which gives something like:
Col Position Character
-------------------------------
ABCDE 1 A
ABCDE 2 B
ABCDE 3 C
ABCDE 4 D
ABCDE 5 E
One way
declare #str varchar(max) = 'ABCDE'
declare #sql nvarchar(max) = ''
declare #i int = 1
while (#i <= len(#str)) begin
set #sql += case when #i > 1 then ',' else '' end + '''' + substring(#str, #i, 1) + ''''
set #i += 1
end
exec('select ' + #sql)
(If ' can appear as a char you would need to substitute '')
This is a solution for a dynamic text length.
-- Generate demo data
CREATE TABLE #temp(col nvarchar(100))
INSERT INTO #temp(col)
VALUES(N'A'),(N'ABC'),(N'DEFGHI'),(N'AB'),(N'KLOMA')
-- Split all in multiple rows
CREATE TABLE #output (col nvarchar(100),part nchar(1), pos int)
;WITH cte AS(
SELECT col, LEFT(col, 1) as part, 1 as pos
FROM #temp
UNION ALL
SELECT col, SUBSTRING(col, pos+1,1) as part, pos+1 as part
FROM cte
WHERE LEN(col) > pos
)
INSERT INTO #output(col, part, pos)
SELECT col, part, pos
FROM cte
DECLARE #sql nvarchar(max), #columnlist nvarchar(max)
-- Generate Columlist for dynamic pivot
SELECT #columnlist = COALESCE(#columnlist + N',[' + CONVERT(nvarchar(max),pos) + ']', N'[' + CONVERT(nvarchar(max),pos) + ']')
FROM #output o
WHERE o.col = (SELECT TOP (1) col FROM #output ORDER BY LEN(col) DESC)
-- Pivoting for readability
SET #sql = N'
SELECT pvt.*
FROM #output o
PIVOT (
MAX(o.part)
FOR pos IN('+#columnlist+')
) as pvt'
EXEC (#sql)
-- Cleanup
DROP TABLE #temp
DROP TABLE #output
The keypart is the cte and the pivoting afterwards. If you have any questions, just give me a short feedback.
I got a table Test with columns A and B.
The A column contains different values in one entry, e.g. abc;def;ghi, all separated by ;. And the B column contains numeric values, but only one.
What I want is to seperate the values from column A into multiple rows.
So:
abc;def;ghi;jkl
-->
abc
def
ghi
jkl
In column B is one value, e.g. 20 and I want that value split to the amount of rows,
So the final result shut be:
abc 5
def 5
ghi 5
jkl 5
The issue is that the amount of values in column A must be variable.
First you need to create this function
REATE FUNCTION Split
(
#delimited nvarchar(max),
#delimiter nvarchar(100)
) RETURNS #t TABLE
(
-- Id column can be commented out, not required for sql splitting string
id int identity(1,1), -- I use this column for numbering splitted parts
val nvarchar(max),
origVal nvarchar(max)
)
AS
BEGIN
declare #xml xml
set #xml = N'<root><r>' + replace(#delimited,#delimiter,'</r><r>') + '</r></root>'
insert into #t(val,origval)
select
r.value('.','varchar(max)') as item, #delimited
from #xml.nodes('//root/r') as records(r)
RETURN
END
GO
then this query might help
Select x.Val, test.B / (len(test.A) - len(replace(Test.A, ';', '')) + 1) from Test
inner join dbo.Split(Test.A,';') x on x.origVal = Test.A
this part len(test.A) - len(replace(Test.A, ';', '')) will count the number of ; in string
Be aware this query might have some malfunctioning if there will be duplicate strings in A column, in this situation you need to pass the unique value (for example ID) to split function and return it in the result table, then join it by this value (ie. x.origVal = Test.A => x.origID = Test.ID)
You can use some tricks with CTE, STUFF and windows functions
DECLARE #t TABLE
(
ID INT ,
A NVARCHAR(MAX) ,
B INT
)
INSERT INTO #t
VALUES ( 1, 'a;b;c;d;', 20 ),
( 2, 'x;y;z;', 40 );
WITH cte ( ID, B, D, A )
AS ( SELECT ID ,
B ,
LEFT(A, CHARINDEX(';', A + ';') - 1) ,
STUFF(A, 1, CHARINDEX(';', A + ';'), '')
FROM #t
UNION ALL
SELECT ID ,
B ,
LEFT(A, CHARINDEX(';', A + ';') - 1) ,
STUFF(A, 1, CHARINDEX(';', A + ';'), '')
FROM cte
WHERE A > ''
)
SELECT ID ,
B ,
D,
CAST(B AS DECIMAL) / COUNT(*) OVER (PARTITION BY ID) AS Portion
FROM cte
Output:
ID B D Portion
1 20 a 5.00000000000
1 20 b 5.00000000000
1 20 c 5.00000000000
1 20 d 5.00000000000
2 40 x 13.33333333333
2 40 y 13.33333333333
2 40 z 13.33333333333
this an example how you can achieve required result
DECLARE #table AS TABLE
(
ColumnA VARCHAR(100) ,
ColumnB FLOAT
)
INSERT INTO #table
( ColumnA, ColumnB )
VALUES ( 'abc;def;ghi;jkl', 20 ),
( 'asf;ret;gsd;jas', 30 ),
( 'dfa;aef;gffhi;fjfkl', 40 );
WITH C AS ( SELECT n = 1
UNION ALL
SELECT n + 1
FROM C
WHERE n <= 100
),
SetForSplit
AS ( SELECT T.ColumnA ,
T.ColumnB ,
C.n ,
( CASE WHEN LEFT(SUBSTRING(T.ColumnA, n, 100), 1) = ';'
THEN SUBSTRING(T.ColumnA, n + 1, 100) + ';'
ELSE SUBSTRING(T.ColumnA, n, 100) + ';'
END ) AS SomeText
FROM #table AS T
JOIN C ON C.n <= LEN(T.ColumnA)
WHERE SUBSTRING(T.ColumnA, n, 1) = ';'
OR n = 1
)
SELECT ROW_NUMBER() OVER ( PARTITION BY columnA ORDER BY LEFT(SomeText,
CHARINDEX(';',
SomeText) - 1) ) AS RowN,
LEFT(SomeText, CHARINDEX(';', SomeText) - 1) AS ColA ,
ColumnB / COUNT(*) OVER ( PARTITION BY ColumnA ) AS ColB
FROM SetForSplit
ORDER BY ColumnA
This is full working exmaple:
DECLARE #DataSource TABLE
(
[A] VARCHAR(MAX)
,[B] INT
);
INSERT INTO #DataSource ([A], [B])
VALUES ('a;b;c;d', 20 ),
('x;y;z', 40 );
SELECT T.c.value('.', 'VARCHAR(100)')
,[B] / COUNT([B]) OVER (PARTITION BY [B])
FROM #DataSource
CROSS APPLY
(
SELECT CONVERT(XML, '<t>' + REPLACE([A], ';', '</t><t>') + '</t>')
) DS([Bxml])
CROSS APPLY [Bxml].nodes('/t') AS T(c)
and of couse you can ROUND the devision as you like.
Working on SQL (2005 and 2008)
the variable with value '1,2,3' would be call #cedis and this could to have N number for example
set #cedis='1' or set #cedis='1,2,3,4,5,6,7' or set #cedis='125,98,91'
so important, its this must to be a select only, a loop could not to be use, only a select!
this must to return a (result as ) table with values for example
set #cedis='1,2,3,4' this must to return a result
number 1 2 3 4
declare #cedis varchar(max)
set #cedis='1,58,123,8'
;with datos as
(
my select with is going to return me the table
)
select * from datos
result set is
number
1
58
123
8
If am not wrong this is what you need
DECLARE #cedis VARCHAR(500)='1,2,3,4'
SELECT Split.a.value('.', 'VARCHAR(100)') Numbers
FROM (SELECT Cast ('<M>' + Replace(#cedis, ',', '</M><M>') + '</M>' AS XML) AS Numbers) AS A
CROSS APPLY Numbers.nodes ('/M') AS Split(a)
Result:
Numbers
-------
1
2
3
4
A table valued function would do it.
CREATE FUNCTION [dbo].[fn_Split](#text VARCHAR(MAX), #delimiter VARCHAR(5) = ',')
RETURNS #Strings TABLE
(
position int IDENTITY PRIMARY KEY,
value VARCHAR(8000)
)
AS
BEGIN
DECLARE #index int
SET #index = -1
WHILE (LEN(#text) > 0)
BEGIN
SET #index = CHARINDEX(#delimiter , #text)
IF (#index = 0) AND (LEN(#text) > 0)
BEGIN
INSERT INTO #Strings VALUES (#text)
BREAK
END
IF (#index > 1)
BEGIN
INSERT INTO #Strings VALUES (LEFT(#text, #index - 1))
END
SET #text = RIGHT(#text, (LEN(#text) - (#index+LEN(#delimiter)-1)))
END
RETURN
END
You can call it as follows:
SELECT *
FROM dbo.fn_Split(#cedis,',')
Here is a more generic solution that breaks any given string into a table based on any given separator:
http://rextester.com/VSRDLS48817
Not an original idea, but I've found it very useful.
create function [dbo].[SplitString]
(
#str nvarchar(255),
#separator char(1)
)
returns table
AS
return (
with tokens(p, a, b) AS (
select
cast(1 as int),
cast(1 as int),
charindex(#separator, #str)
union all
select
p + 1,
b + 1,
charindex(#separator, #str, b + 1)
from tokens
where b > 0
)
select
p-1 ItemIndex,
substring(
#str,
a,
case when b > 0 then b-a ELSE LEN(#str) end)
AS Item
from tokens
);
This is another one approach to get required output result
DECLARE #cedis VARCHAR(MAX) ,
#delimeter VARCHAR(10)
SET #cedis = '1,58,123,8,14144,15,155231,15,3647,2347,45,76,68,2354,577,5'
SET #delimeter = ','
SET #cedis = #cedis + #delimeter;
WITH datos
AS ( SELECT n = 1
UNION ALL
SELECT n + 1
FROM datos
WHERE n <= LEN(#cedis)
),
cte
AS ( SELECT T.N ,
ROW_NUMBER() OVER ( ORDER BY T.N ) AS RN
FROM datos AS T
WHERE SUBSTRING(#cedis, T.N, LEN(#delimeter)) = #delimeter
AND LEN(#cedis) >= T.N
)
SELECT SUBSTRING(#cedis, COALESCE(R.N + LEN(#delimeter), 1),
L.N - COALESCE(R.N + LEN(#delimeter), 1)) AS part ,
L.RN AS ID
FROM cte AS L
LEFT JOIN cte AS R ON L.RN = R.RN + 1
OPTION ( MAXRECURSION 1000 )