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Trying to replace some strings on my database where I've got two tables. The replacement on table_2 uses the results of the first replacement as an input:
Current state (string is only a stand-in, it can be anything, the important part is the dash):
|table_1 - col1| |table_2 - col1 |
---------------- ------------------------------
|string-1 | |text string-1 text string-3 |
|string-2 | |text string-3 string-2 t-ext|
|string-3 | |string-2 text string-3 te-xt|
Desired Result:
|table_1 - col1 | |table_2 - col1 |
----------------- ------------------------------
|string_1 | |text string_1 text string_3 |
|string_2 | |text string_3 string_2 t-ext|
|string_3 | |string_2 text string_3 te-xt|
Simply put I want to replace the - with _ in table_1 and also perform a corresponding replacement on table_2.
Came up with the first part, but I can't figure out the replacement part on table_2:
SELECT col1, REPLACE(col1, '-', '_') as Replacement
FROM table_1
where col1 like '%-%'
I need to do something like this (this code is INCORRECT):
SELECT REPLACE(col1,
SELECT [col1] FROM [table_1] where col1 like '%-%',
SELECT REPLACE([col1], '-', '_') FROM [table_1] where col1 like '%-%')
from table_2
For no more then 2 replacements
SELECT t2.col2, REPLACE(REPLACE(t2.col2,t1.col1,REPLACE(t1.col1, '-', '_')),t3.col1,REPLACE(t3.col1, '-', '_'))
FROM table_2 t2
JOIN table_1 t1 ON t2.col2 like '%' +t1.col1+'%' AND t1.col1 LIKE '%-%'
LEFT JOIN table_1 t3 ON t3.col1 <> t1.col1 AND t2.col2 LIKE '%'+t3.col1+'%' AND t3.col1 LIKE '%-%'
WHERE t2.col2 LIKE '%-%'
This is fully ad-hoc, no recursion needed:
DECLARE #table_1 TABLE(ID INT IDENTITY,col1 VARCHAR(100));
INSERT INTO #table_1 VALUES
('string-1'),('string-2'),('string-3');
DECLARE #table_2 TABLE(ID INT IDENTITY,col1 VARCHAR(100));
INSERT INTO #table_2 VALUES
('text string-1 text string-3'),('text string-3 string-2 t-ext'),('string-2 text string-3 te-xt');
--The first CTE replaces the value in t1
WITH t1New AS
(
SELECT ID AS t1_ID
,t1.col1 AS t1c1
,REPLACE(t1.col1,'-','_') AS new_t1c1
FROM #table_1 AS t1
)
--The second CTE splits the strings of t2 on the blanks
,t2Splitted AS
(
SELECT ID
,col1 AS t2c1
,CAST('<x>' + REPLACE(t2.col1,' ','</x><x>') + '</x>' AS XML) AS Casted
FROM #table_2 AS t2
)
--This CTE maps the values to the splitted parts
,Mapped AS
(
SELECT t1New.*
,t2Splitted.ID AS t2_ID
,ROW_NUMBER() OVER(PARTITION BY t2Splitted.ID ORDER BY (SELECT NULL)) AS PartIndex
,part.value('.','nvarchar(max)') AS Part
FROM t2Splitted
CROSS APPLY t2Splitted.Casted.nodes('/x') AS A(part)
LEFT JOIN t1New ON t1New.t1c1=part.value('.','nvarchar(max)')
)
--If there is a mapping, the new value is taken, else take the old value
,NewValues AS
(
SELECT *
,CASE WHEN t1c1 IS NOT NULL THEN new_t1c1 ELSE Part END AS newValue
FROM Mapped
)
--The final CTE re-concatenates the string with blanks in the original order
,Final AS
(
SELECT nv1.t2_ID
,(SELECT ' ' + nv2.newValue
FROM NewValues AS nv2
WHERE nv2.t2_ID=nv1.t2_ID
ORDER BY PartIndex
FOR XML PATH('')) AS FinalValue
FROM NewValues AS nv1
GROUP BY nv1.t2_ID
)
--This last value is used to update the original table
UPDATE t2 SET t2.col1=Final.FinalValue
FROM #table_2 AS t2
INNER JOIN Final ON Final.t2_ID=t2.ID
What's up to you: UPDATE t1, that's a one-liner and get rid of the trailing space in FinalValue :-)
SELECT * FROM #table_2
Variable based replacement can be done as replacing with a table.
DECLARE #Raw NVARCHAR(MAX) = '...';
SELECT #Raw= REPLACE(#Raw, P, R)
FROM (VALUES ('string-1', 'string_1'),
('string-2','string_2'),
('string-3','string_3'),
('string-4','string_4'),
) AS T(P, R);
To execute the same logic against table, think about some statements like
SELECT col1, MultipleReplace(col1, replacement_table(P, R))
FROM some_table
So create a function that accepts a string input and a replacement table. In order to pass table to function, we have to create a table type.
CREATE TYPE dbo.MulReplacements AS TABLE
(
Pattern NVARCHAR(MAX) NOT NULL,
Replacement NVARCHAR(MAX) NOT NULL
)
Then the function would be
CREATE FUNCTION dbo.MulReplace(
#string AS NVARCHAR(MAX),
#replacements AS dbo.MulReplacements READONLY
)
RETURNS NVARCHAR(MAX)
AS
BEGIN
DECLARE #result AS NVARCHAR(MAX) = #string;
SELECT #result = REPLACE(#result, R.Pattern, R.Replacement)
FROM #replacements AS R;
RETURN #result;
END
Put all together
DECLARE #replacement AS dbo.MulReplacements;
INSERT INTO #replacement
SELECT col1, REPLACE(col1, '-', '_')
FROM (VALUES ('string-1'), ('string-2'), ('string-3')) AS table_1(col1)
SELECT col1, dbo.Mulreplace(col1, #replacement)
FROM (VALUES ('text string-1 text string-3'), ('text string-3 string-2 t-ext'), ('string-2 text string-3 te-xt')) AS table_2(col1)
One way of doing it with Dynamic query. Replace the actual table name and column names (commented where to change).
DECLARE #colNames VARCHAR(MAX) = ''
SELECT #colNames = #colNames + ', [' + table1_Col1 + ']' FROM tableName1 -- Table1 Column and Table1 Name
DECLARE #ReqColNames VARCHAR(MAX) = STUFF(#colNames, 1, 1, '')
DECLARE #int int
SELECT #int = count(*) FROM tableName1 -- Table1 Name
DECLARE #replace varchar(max) = replicate('REPLACE(', #int) + 't2.table2_Col2' -- Table2 Column
DECLARE #replaceCols varchar(max) = ''
SELECT #replaceCols = #replaceCols + ', r.[' + table1_Col1 + '], replace(r.[' + table1_Col1 + '], ''-'', ''_''))' FROM tableName1 -- Table1 Column and Table1 Name
DECLARE #ReplaceString varchar(max) = #replace + #replaceCols
DECLARE #cmd varchar(max) = 'SELECT ' + #ReplaceString + ' FROM
(
SELECT * FROM tableName1
PIVOT
(MAX (table1_Col1) FOR table1_Col1 IN (' + #ReqColNames + ')) x
) r
CROSS JOIN tableName2 t2'
EXEC(#cmd)
Static Query: for above code (to show what the above dynamic code is generating):
Select replace(replace(replace(t2.table2_Col2
, r.[string-1], replace(r.[string-1], '-', '_'))
, r.[string-2], replace(r.[string-2], '-', '_'))
, r.[string-3], replace(r.[string-3], '-', '_'))
from
(
Select * from tableName1
PIVOT
(MAX (table1_Col1) FOR table1_Col1 IN ([string-1], [string-2], [string-3])) x
) r
CROSS JOIN tableName2 t2
Output:
text string_1 text string_3
text string_3 string_2 t-ext
string_2 text string_3 te-xt
I need to write SQL query in order to extract some data.
i have this data in my table:
ID Store Value
1 9921 NOK
2 9921 NOK1
3 9921 OK3
what i need is to get data from select query like this form:
9921 NOK,NOK1,OK3
Any help please ?
You can use STUFF:
SELECT DISTINCT Store,
STUFF((SELECT ',' + Value
FROM Your_Table
WHERE Store = 9921
FOR XML PATH('')), 1, 1, '')
FROM Your_Table
Try to accomplish your excepted output by using COALESCE;
Create a sample table for testing purpose
CREATE TABLE SampleData (id INT ,store INT ,value NVARCHAR(50))
INSERT INTO SampleData VALUES (1 ,9921 ,'NOK')
INSERT INTO SampleData VALUES (2 ,9921 ,'NOK1')
INSERT INTO SampleData VALUES (3 ,9921 ,'NOK2')
Create a Scalar-Valued Function
Alter FUNCTION fun_GetCombinedData
(
#store int
)
RETURNS nvarchar(max)
AS
BEGIN
-- Declare the return variable here
DECLARE #CombineValue nvarchar(max)
SELECT #CombineValue = COALESCE(#CombineValue + ', ', '') + value
FROM SampleData where store=#store
RETURN #CombineValue
END
GO
Final Query,
SELECT store
,dbo.fun_GetCombinedData(store) AS value
FROM SampleData
GROUP BY store
Expected Output:
store | value
------------------------
9921 | NOK,NOK1,NOK2
This is one of the way to simplify your select query.
Using T-SQL we can do it this way:
declare #store int = 9921, #values varchar(max) = ''
select #values = #values
+ case
when #values = '' then ''
else ','
end + value
from table_name
where store = #store
order by id
select #store, #values
Go through this below example
Demo: [SQLFiddle]
The SQL I used is as below,
SELECT
store,
STUFF(
(SELECT DISTINCT ',' + value
FROM SampleData
WHERE store = a.store
FOR XML PATH (''))
, 1, 1, '') AS CombineValues
FROM SampleData AS a
GROUP BY store
you will see your expected result as "CombineValues"
store CombineValues
9921 NOK,NOK1,NOK2
from table I retrieves values, for example,
7752652:1,7752653:2,7752654:3,7752655:4
or
7752941:1,7752942:2
i.e. string may contain any quantity of substrings.
What I need: remove all occurrences of characters from char ':' to a comma char.
For example,
7752652:1,7752653:2,7752654:3,7752655:4
should be
7752652,7752653,7752654,7752655
How do it?
Replace : with start tag <X>.
Replace , with end tag </X> and an extra comma.
Add an extra end tag to the end </X>.
That will give you a string that look like 7752941<X>1</X>,7752942<X>2</X>.
Cast to XML and use query(text()) to get the root text values.
Cast the result back to string.
SQL Fiddle
MS SQL Server 2012 Schema Setup:
create table T
(
C varchar(100)
)
insert into T values
('7752652:1,7752653:2,7752654:3,7752655:4'),
('7752941:1,7752942:2')
Query 1:
select cast(cast(replace(replace(T.C, ':', '<X>'), ',', '</X>,')+'</X>' as xml).query('text()') as varchar(100)) as C
from T
Results:
| C |
|---------------------------------|
| 7752652,7752653,7752654,7752655 |
| 7752941,7752942 |
declare #query varchar(8000)
select #query= 'select '+ replace (
replace('7752652:1,7752653:2,7752654:3,7752655:4',',',' t union all select ')
,':',' t1 , ')
exec(';with cte as ( '+#query+' ) select cast(t1 as varchar)+'','' from cte for xml path('''')')
Try this:
DECLARE #Data VARCHAR(100) = '7752652:1,7752653:2,7752654:3,7752655:4'
DECLARE #Output VARCHAR(100) = ''
WHILE CHARINDEX(':', #Data) > 0
BEGIN
IF LEN(#Output) > 0 SET #Output = #Output + ','
SET #Output = #Output + LEFT(#Data, CHARINDEX(':', #Data)-1)
SET #Data = STUFF(#Data,
1,
(CASE CHARINDEX(',', #Data)
WHEN 0 THEN LEN(#Data)
ELSE CHARINDEX(',', #Data)
END) - CHARINDEX(':', #Data),
'')
END
SELECT #Output AS Result -- 7752652,7752653,7752654,7752655
Hope this will help.
I borrowed the Splitter function from here. You could use any delimiter parser you may already be using.
Parse the string to table values
Used Substring function to remove values after ':'
Use For xml to re-generate CSV
Test Data:'
IF OBJECT_ID(N'tempdb..#temp')>0
DROP TABLE #temp
CREATE TABLE #temp (id int, StringCSV VARCHAR(500))
INSERT INTO #temp VALUES ('1','7752652:1,7752653:2,7752654:3,7752655:4')
INSERT INTO #temp VALUES ('2','7752656:1,7752657:3,7752658:4')
INSERT INTO #temp VALUES ('3','7752659:1,7752660:2')
SELECT * FROM #temp t
Main Query:
;WITH cte_Remove(ID, REMOVE) AS
(
SELECT y.id AS ID,
SUBSTRING(fn.string, 1, CHARINDEX(':', fn.string) -1) AS Removed
FROM #temp AS y
CROSS APPLY dbo.fnParseStringTSQL(y.StringCSV, ',') AS fn
)
SELECT DISTINCT ID,
STUFF(
(
SELECT ',' + REMOVE
FROM cte_Remove AS t2
WHERE t2.ID = t1.ID
FOR XML PATH('')
),1,1,'') AS col2
FROM cte_Remove AS t1
Cleanup Test Data:
IF OBJECT_ID(N'tempdb..#temp') > 0
DROP TABLE #temp
I solved this problem with CLR function. It is more quickly and function can be used in complex queries
public static SqlString fnRemoveSuffics(SqlString source)
{
string pattern = #":(\d+)";
string replacement = "";
string result = Regex.Replace(source.Value, pattern, replacement);
return new SqlString(result);
}
I have the following code, the problem is that my variable list #LocationList is essentially a csv string. When I use this as part of the where LocationID in (#LocationList) it says its not an int (LocationID is an int). How can I get this csv string to be accepted by teh in clause?
Declare #LocationList varchar(1000)
Set #LocationList = '1,32'
select Locations from table where Where LocationID in (#LocationList)
The most efficient way to do this is with Dynamic SQL such as rt2800 mentions (with injection warnings by Michael Allen)
However you can make a function:
ALTER FUNCTION [dbo].[CSVStringsToTable_fn] ( #array VARCHAR(8000) )
RETURNS #Table TABLE ( value VARCHAR(100) )
AS
BEGIN
DECLARE #separator_position INTEGER,
#array_value VARCHAR(8000)
SET #array = #array + ','
WHILE PATINDEX('%,%', #array) <> 0
BEGIN
SELECT #separator_position = PATINDEX('%,%', #array)
SELECT #array_value = LEFT(#array, #separator_position - 1)
INSERT #Table
VALUES ( #array_value )
SELECT #array = STUFF(#array, 1, #separator_position, '')
END
RETURN
END
and select from it:
DECLARE #LocationList VARCHAR(1000)
SET #LocationList = '1,32'
SELECT Locations
FROM table
WHERE LocationID IN ( SELECT *
FROM dbo.CSVStringsToTable_fn(#LocationList) )
OR
SELECT Locations
FROM table loc
INNER JOIN dbo.CSVStringsToTable_fn(#LocationList) list
ON list.value = loc.LocationID
Which is extremely helpful when you attempt to send a multi-value list from SSRS to a PROC.
I often have this requirement, and SOMETIME, if you know very well the column you are searching on [the size/format/length], you can do a kind of REGEX.
Something like this :
DECLARE #MyListOfLocation varchar(255)
set #MyListOfLocation = '|1|32|36|24|3|'
Select LocationID
from Table
where #MyListOfLocation like '%|' + LocationID + '|%'
NOTE : the PIPE character is used to protect the query from returning any LocationID that contains a single character (the '1', for example).
Here is a complete working example :
DECLARE #MyListOfLocation varchar(255)
set #MyListOfLocation = '|1|11|21|'
SELECT LocationName
FROM (
select '1' as LocationID, 'My Location 1' as LocationName
union all
select '11' as LocationID, 'My Location 11' as LocationName
union all
select '12' as LocationID, 'My Location 12' as LocationName
union all
select '13' as LocationID, 'My Location 13' as LocationName
union all
select '21' as LocationID, 'My Location 21' as LocationName
) as MySub
where #MyListOfLocation like '%|' + LocationID + '|%'
WARNING! This method is not Index friendly!
If you want do add some IN(#MyListOfLocation) in all that, to leverage use of INDEXES, you can modify your script do to :
SELECT MyDATA.*
FROM HugeTableWithAnIndexOnLocationID as MyDATA
WHERE LocationID in (
Select LocationID
from Table
where #MyListOfLocation like '%|' + LocationID + '|%')
declare #querytext Nvarchar(MAX)
set #querytext = 'select Locations from table where Where LocationID in (' + #LocationList + ');';
exec sp_executesql #querytext;
I am getting the result in SQL Server as
SELECT StudentId FROM Student WHERE condition = xyz
I am getting the output like
StudentId
1236
7656
8990
........
The output parameter of the stored procedure is #studentId string and I want the return statement as
1236, 7656, 8990.
How can I convert the output in the single string?
I am returning single column [ie. StudentId]
Test this:
DECLARE #result NVARCHAR(MAX)
SELECT #result = STUFF(
( SELECT ',' + CONVERT(NVARCHAR(20), StudentId)
FROM Student
WHERE condition = abc
FOR xml path('')
)
, 1
, 1
, '')
DECLARE #result varchar(1000)
SELECT #result = ISNULL(#result, '') + StudentId + ',' FROM Student WHERE condition = xyz
select substring(#result, 0, len(#result) - 1) --trim extra "," at end
Use the COALESCE function:
DECLARE #StudentID VARCHAR(1000)
SELECT #StudentID = COALESCE(#StudentID + ',', '') + StudentID
FROM Student
WHERE StudentID IS NOT NULL and Condition='XYZ'
select #StudentID
Both answers are valid, but don't forget to initializate the value of the variable, by default is NULL and with T-SQL:
NULL + "Any text" => NULL
It's a very common mistake, don't forget it!
Also is good idea to use ISNULL function:
SELECT #result = #result + ISNULL(StudentId + ',', '') FROM Student
Use the CONCAT function to avoid conversion errors:
DECLARE #StudentID VARCHAR(1000)
SELECT #StudentID = CONCAT(COALESCE(#StudentID + ',', ''), StudentID)
FROM Student
WHERE StudentID IS NOT NULL and Condition='XYZ'
select #StudentID
The following is a solution for MySQL (not SQL Server), i couldn't easily find a solution to this on stackoverflow for mysql, so i figured maybe this could help someone...
ref: https://forums.mysql.com/read.php?10,285268,285286#msg-285286
original query...
SELECT StudentId FROM Student WHERE condition = xyz
original result set...
StudentId
1236
7656
8990
new query w/ concat...
SELECT group_concat(concat_ws(',', StudentId) separator '; ')
FROM Student
WHERE condition = xyz
concat string result set...
StudentId
1236; 7656; 8990
note: change the 'separator' to whatever you would like
GLHF!
This one works with NULL Values in Table and doesn't require substring operation at the end. COALESCE is not really well working with NULL values in table (if they will be there).
DECLARE #results VARCHAR(1000) = ''
SELECT #results = #results +
ISNULL(CASE WHEN LEN(#results) = 0 THEN '' ELSE ',' END + [StudentId], '')
FROM Student WHERE condition = xyz
select #results
The answer from brad.v is incorrect! It won't give you a concatenated string.
Here's the correct code, almost like brad.v's but with one important change:
DECLARE #results VarChar(1000)
SELECT #results = CASE
WHEN #results IS NULL THEN CONVERT( VarChar(20), [StudentId])
ELSE #results + ', ' + CONVERT( VarChar(20), [StudentId])
END
FROM Student WHERE condition = abc;
See the difference? :) brad.v please fix your answer, I can't do anything to correct it or comment on it 'cause my reputation here is zero. I guess I can remove mine after you fix yours. Thanks!
Use STRING_AGG:
SELECT STRING_AGG(sub.StudentId, ',') FROM
(select * from dbo.Students where Name = 'Test3') as sub
If you want to use e.g ORDER BY:
SELECT STRING_AGG(sub.StudentId, ',') WITHIN GROUP(Order by StudentId) FROM
(select * from dbo.Students where Name = 'Test3') as sub
or a single select statement...
DECLARE #results VarChar(1000)
SELECT #results = CASE
WHEN #results IS NULL THEN CONVERT( VarChar(20), [StudentId])
ELSE ', ' + CONVERT( VarChar(20), [StudentId])
END
FROM Student WHERE condition = abc;
Assign a value when declaring the variable.
DECLARE #result VARCHAR(1000) ='';
SELECT #result = CAST(StudentId AS VARCHAR) + ',' FROM Student WHERE condition = xyz