I need to write a query in t-sql or linq that matches db records that contain the most of the user input words.
exmaple:
nvarchar field in db: "The quick brown fox jumps over the lazy dog"
User input: "brown cow"
The program would match that record because it has the word brown.
let me know if i need to provide more examples.
Assuming you're using T-SQL in a MS SQL Server environment, then you should use Full Text Search technology. It gives you the speed and keeps you away from reinventing the wheel.
We generally use a UDF to split a string into tabular data and can use like command for the same.
declare #searchStr nvarchar(100)
set #searchStr = 'brown fox'
selecT T.* from test T, dbo.fnc_SplitSTring(#searchStr,' ')
where T.name like '%' + token + '%'
CREATE FUNCTION [dbo].[fnc_SplitString]
(
#InString varchar(8000),
#Delim char(1)
)
RETURNS #Return table
(
Position int identity,
Token varchar(100) -- Maximum token size is 100 chars...
)
As
BEGIN
Declare #CR varchar(1),
#LF varchar(1)
Set #CR = char(10)
Set #LF = char(13)
--
If #InString is null return
--
Declare #Pos int
Declare #Pattern char(3)
Set #Pattern = '%' + #Delim + '%'
--
Declare #Token varchar(30)
SELECT #InString = #InString + #Delim -- add trailing delimiter
SELECT #Pos = PATINDEX(#Pattern, #InString)
WHILE (#Pos <> 0) BEGIN
SELECT #Token = ltrim(rtrim(SUBSTRING(#InString, 1, #Pos - 1)))
Select #Token = replace(#Token, #CR, '')
Select #Token = replace(#Token, #LF, '')
Insert #Return Values (#Token)
SELECT #InString = STUFF(#InString, 1, PATINDEX(#Pattern, #InString),'')
SELECT #Pos = PATINDEX(#Pattern, #InString)
END
--
return
--
END
Related
I have been looking at examples of cursors in stored procedures and all of them seem to be either printing to the console or manipulating data in the main loop.
My situation is as follows:
Create a stored procedure that returns filtered rows from a single table.
Create a cursor for a simple SELECT statement without a WHERE clause.
Iterate through the fetch cycle.
Return only rows that meet certain criteria.
Pseudocode (C#, EntityFrameworkCore):
var name = "xyz";
var email = "";
var users = new List<User>();
foreach (var user in context.Users.AsQueryable())
{
var added = false;
if (!added)
{
if ((!string.IsNullOrWhitespace(name)) && (user.Name.Contains(name)))
{
users.Add(user);
}
}
if (!added)
{
if ((!string.IsNullOrWhitespace(email)) && (user.Name.Contains(email)))
{
users.Add(user);
}
}
}
These conditions can be complex enough to not be able to fit in a WHERE clause. Hence looking at cursors.
Just not sure how to think about this. A cursor is an iterator but how do you accumulate filtered rows to return?
Any advice would be appreciated.
Here is the stored procedure I would like to use cursors in:
CREATE OR ALTER PROCEDURE SpUserSearch
#Condition BIT = 0, -- AND=0, OR=1.
#Name NVARCHAR(100) = NULL,
#Email NVARCHAR(100) = NULL
AS
BEGIN
SET NOCOUNT ON;
DECLARE #UseName BIT
DECLARE #UseEmail BIT
IF ((#Name IS NULL) OR (LEN(#Name) = 0)) SET #UseName = 0 ELSE SET #UseName = 1
IF ((#Email IS NULL) OR (LEN(#Email) = 0)) SET #UseEmail = 0 ELSE SET #UseEmail = 1
IF (#Condition = 0)
SELECT [Id], [Name], [Email]
FROM [User]
WHERE
((#UseName = 1) OR ([Name] LIKE '%' + #Name + '%'))
AND
((#UseEmail = 1) OR ([Email] LIKE '%' + #Email + '%'))
ELSE
SELECT [Id], [Name], [Email]
FROM [User]
WHERE
((#UseName = 1) OR ([Name] LIKE '%' + #Name + '%'))
OR
((#UseEmail = 1) OR ([Email] LIKE '%' + #Email + '%'))
RETURN (##ROWCOUNT)
END
This type of query is called a Kitchen Sink query.
This can have issues due to parameter sniffing. So the best way to do this is not to use a cursor, but to dynamically build the conditions, and execute it using sp_executesql.
Note how the actual values are not concatenated in, but are also passed through as parameters to the dynamic side.
CREATE OR ALTER PROCEDURE SpUserSearch
#Condition BIT = 0, -- AND=0, OR=1.
#Name NVARCHAR(100) = NULL,
#Email NVARCHAR(100) = NULL
AS
BEGIN
SET NOCOUNT ON;
DECLARE #sql nvarchar(max) = N'
SELECT [Id], [Name], [Email]
FROM [User]
WHERE 1=1 AND (
';
DECLARE #conditions nvarchar(max);
IF NULLIF(#Name, '') IS NOT NULL
SET #conditions = '([Name] LIKE ''%'' + #Name + ''%'')' + '
';
IF NULLIF(#Email, '') IS NOT NULL
SET #conditions = CONCAT(
#conditions + CASE WHEN #Condition = 0 THEN 'AND ' ELSE 'OR ' END + '
',
'([Email] LIKE ''%'' + #Email + ''%'')
');
SET #sql += #conditions + '
);
RETURN (##ROWCOUNT);
';
PRINT #sql; --for testing
DECLARE #rc int;
EXEC #rc = sp_executesql
#sql,
N'#Name NVARCHAR(100), #Email NVARCHAR(100)',
#Name = #Name,
#Email = #Email;
RETURN #rc;
END
I agree with the others that a cursor sounds like a really bad fit for your use case. But to answer your question, you would first create a temp table, then the cursor could insert any matching rows to the temp table as it looks through the data. At the end, select all rows from the temp table.
I have two separate queries/methods and functions so that I can pass two strings in my stored procedures which basically look like this:
1234,12346,12690812,1259081 => UPCList parameter
1234,12346,12690812,1259081 => EANList parameter
Now the first method looks like following:
create procedure [dbo].[zsp_selectallupceans_list]
(
#UPCList nvarchar(4000),
#EANList nvarchar(4000),
#Type tinyint
)
as
select DISTINCT dd.UPC,dd.EAN,dd.EBAYID as ItemID
from ThirdPartyData as dd
where dd.UPC in (SELECT * FROM dbo.SplitString(#UPCList)) OR
dd.EAN in (SELECT * FROM dbo.SplitString(#EANList)) and dd.Type=#Type
Combined with splitstring function created in MSSQL:
create FUNCTION [dbo].[splitstring] ( #stringToSplit VARCHAR(MAX) )
RETURNS
#returnList TABLE ([Name] [nvarchar] (500))
AS
BEGIN
DECLARE #name NVARCHAR(255)
DECLARE #pos INT
WHILE CHARINDEX(',', #stringToSplit) > 0
BEGIN
SELECT #pos = CHARINDEX(',', #stringToSplit)
SELECT #name = SUBSTRING(#stringToSplit, 1, #pos-1)
INSERT INTO #returnList
SELECT #name
SELECT #stringToSplit = SUBSTRING(#stringToSplit, #pos+1, LEN(#stringToSplit)-#pos)
END
INSERT INTO #returnList
SELECT #stringToSplit
RETURN
END
And now the second method:
create procedure [dbo].[zsp_selectallupceans_listProduction]
(
#UPCList nvarchar(4000),
#EANList nvarchar(4000),
#Type tinyint
)
as
SELECT dd.UPC,dd.EAN,dd.EBAYID as ItemID
from ThirdPartyData as dd
WHERE EXISTS (SELECT 1 FROM dbo.SplitStringProduction(#UPCList,',') S1 WHERE dd.UPC=S1.val)
OR EXISTS (SELECT 1 FROM dbo.SplitStringProduction(#EANList,',') S2 WHERE dd.EAN=S2.val) and dd.Type=#Type
And now the second method splitstringProduction:
create FUNCTION [dbo].[SplitStringProduction]
(
#string nvarchar(max),
#delimiter nvarchar(5)
) RETURNS #t TABLE
(
val nvarchar(500)
)
AS
BEGIN
declare #xml xml
set #xml = N'<root><r>' + replace(#string,#delimiter,'</r><r>') + '</r></root>'
insert into #t(val)
select
r.value('.','varchar(500)') as item
from #xml.nodes('//root/r') as records(r)
RETURN
END
And now here comes the weird part... Benchmark results of both methods come up like this:
var findEans = ctx.zsp_selectallupceans_list(formedList.UPCList, formedList.EANList, 1).ToList();
//Execution time 4.8 seconds
var findEans = ctx.zsp_selectallupceans_listProduction(formedList.UPCList, formedList.EANList, 1).ToList();
//Execution time: 15 seconds
As far as my understanding goes, the second method should perform much faster than first... But this is not the case... Not only is the performance for the 2nd method worse, it is more than 3 times execution time than the first... And I cannot understand why ...
What is going on here guys? What would be the best method to reduce the execution time to <1 second?
Can someone help me out here please?
I have basic procedure which basically looks like following:
create procedure zsp_selectallupceans_list
(#UPCList nvarchar(4000),
#EANList nvarchar(4000))
as
select *
from data as dd
where dd.UPC in (--myUPC list) or dd.EAN in (--myEAN list)
This is the basic idea. Now I need to somehow split this string that I passed from my C# application and it would look like following for the UPC and EAN List:
where dd.UPC in ('123','456','567') or dd.EAN in('1234','5542','412')
The UPCList parameter that is passed from C# application looks like:
'123,456,567' and eanlist: '1234,5542,412'
I have found a method which looks like this:
CREATE FUNCTION dbo.splitstring
(#stringToSplit VARCHAR(MAX))
RETURNS
#returnList TABLE ([Name] [NVARCHAR](500))
AS
BEGIN
DECLARE #name NVARCHAR(255)
DECLARE #pos INT
WHILE CHARINDEX(',', #stringToSplit) > 0
BEGIN
SELECT #pos = CHARINDEX(',', #stringToSplit)
SELECT #name = SUBSTRING(#stringToSplit, 1, #pos-1)
INSERT INTO #returnList
SELECT #name
SELECT #stringToSplit = SUBSTRING(#stringToSplit, #pos+1, LEN(#stringToSplit)-#pos)
END
INSERT INTO #returnList
SELECT #stringToSplit
RETURN
END
And the usage of this function is like following:
SELECT * FROM dbo.splitstring('91,12,65,78,56,789')
where the output is these numbers where they are split and output as a result.
Now I just need to somehow combine all this so that I can form a proper where statement based on passed parameter UPCList and EANList
Can someone help me out with this?
Updating your stored proc as below should do the trick:
create procedure zsp_selectallupceans_list
(
#UPCList nvarchar(4000),
#EANList nvarchar(4000)
)
as
select *
from data as dd
where dd.UPC in (SELECT * FROM dbo.SplitString(#UPCList)) OR
dd.EAN in (SELECT * FROM dbo.SplitString(#EANList))
You pretty much have the answer:
Compile and save the splitstring function and then your where clause will look like the following:
where dd.UPC in (Select Name From splitstring(--myUpcList)) or dd.EAN in (Select Name from splitstring(--myEanList)
Here is an XML based function for string splitting, this method is much faster than the SUBSTRING method you already found. It is also recommended to use EXISTS instead of IN for performance improvement also, see here for more information on this.
CREATE FUNCTION [dbo].[SplitString]
(
#string nvarchar(max),
#delimiter nvarchar(5)
) RETURNS #t TABLE
(
val nvarchar(500)
)
AS
BEGIN
declare #xml xml
set #xml = N'<root><r>' + replace(#string,#delimiter,'</r><r>') + '</r></root>'
insert into #t(val)
select
r.value('.','varchar(500)') as item
from #xml.nodes('//root/r') as records(r)
RETURN
END
To use:
SELECT *
FROM data t
WHERE EXISTS (SELECT 1 FROM dbo.SplitString(#UPCList,',') S1 WHERE t.UPC=S1.val)
OR EXISTS (SELECT 1 FROM dbo.SplitString(#EANList,',') S2 WHERE t.EAN=S2.val)
I'm trying to write a stored procedure to search for a string in all tables of a SQL Server database. I was able to find a good stored procedure for this purpose
However I don't want to just put the #Tablenames manually, I want it to go to a table called Enums_Tables that has an ID, and use that ID as #Tablenames.
What I have being thinking to solve this:
I could write another stored procedure to select all Id's from Enums_Tables and execute the first stored procedure, like in here
I could also pass the parameter in C#, since I'm going to use it as a search textbox. But the ideal would be making a single stored procedure.
Could you please help me with this?
EDIT
Thanks to GPW I have been able to solve this problem. I also encountered problems with the collation, but I also solve it. Below is the final stored procedure.
USE [DynaForms]
GO
/****** Object: stored procedure [dbo].[SP_SearchTables] Script Date: 09/11/2017 14:59:15 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
ALTER PROCEDURE [dbo].[SP_SearchTables]
--#Tablenames VARCHAR(500)
#SearchStr NVARCHAR(60)
,#GenerateSQLOnly Bit = 0
,#SchemaNames VARCHAR(500) ='%'
AS
/*
Parameters and usage
#Tablenames -- Provide a single table name or multiple table name with comma seperated.
If left blank , it will check for all the tables in the database
Provide wild card tables names with comma seperated
EX :'%tbl%,Dim%' -- This will search the table having names comtains "tbl" and starts with "Dim"
#SearchStr -- Provide the search string. Use the '%' to coin the search. Also can provide multiple search with comma seperated
EX : X%--- will give data staring with X
%X--- will give data ending with X
%X%--- will give data containig X
%X%,Y%--- will give data containig X or starting with Y
%X%,%,,% -- Use a double comma to search comma in the data
#GenerateSQLOnly -- Provide 1 if you only want to generate the SQL statements without seraching the database.
By default it is 0 and it will search.
##SchemaNames -- Provide a single Schema name or multiple Schema name with comma seperated.
If left blank , it will check for all the tables in the database
Provide wild card Schema names with comma seperated
EX :'%dbo%,Sales%' -- This will search the Schema having names comtains "dbo" and starts with "Sales"
Samples :
1. To search data in a table
EXEC SP_SearchTables #Tablenames = 'T1'
,#SearchStr = '%TEST%'
The above sample searches in table T1 with string containing TEST.
2. To search in a multiple table
EXEC SP_SearchTables #Tablenames = 'T2'
,#SearchStr = '%TEST%'
The above sample searches in tables T1 & T2 with string containing TEST.
3. To search in a all table
EXEC SP_SearchTables #Tablenames = '%'
,#SearchStr = '%TEST%'
The above sample searches in all table with string containing TEST.
4. Generate the SQL for the Select statements
EXEC SP_SearchTables #Tablenames = 'T1'
,#SearchStr = '%TEST%'
,#GenerateSQLOnly = 1
5. To Search in tables with specfic name
EXEC SP_SearchTables #Tablenames = '%T1%'
,#SearchStr = '%TEST%'
,#GenerateSQLOnly = 0
6. To Search in multiple tables with specfic names
EXEC SP_SearchTables #Tablenames = '%T1%,Dim%'
,#SearchStr = '%TEST%'
,#GenerateSQLOnly = 0
7. To specify multiple search strings
EXEC SP_SearchTables #Tablenames = '%T1%,Dim%'
,#SearchStr = '%TEST%,TEST1%,%TEST2'
,#GenerateSQLOnly = 0
8. To search comma itself in the tables use double comma ",,"
EXEC SP_SearchTables #Tablenames = '%T1%,Dim%'
,#SearchStr = '%,,%'
,#GenerateSQLOnly = 0
EXEC SP_SearchTables #Tablenames = '%T1%,Dim%'
,#SearchStr = '%with,,comma%'
,#GenerateSQLOnly = 0
9. To Search by SchemaName
EXEC SP_SearchTables #Tablenames = '%T1%,Dim%'
,#SearchStr = '%,,%'
,#GenerateSQLOnly = 0
,#SchemaNames = '%dbo%,Sales%'
*/
SET NOCOUNT ON
DECLARE #MatchFound BIT
SELECT #MatchFound = 0
DECLARE #CheckTableNames Table
(
Schemaname sysname
,Tablename sysname
)
DECLARE #SearchStringTbl TABLE
(
SearchString VARCHAR(500)
)
DECLARE #SQLTbl TABLE
(
Tablename SYSNAME
,WHEREClause VARCHAR(MAX)
,SQLStatement VARCHAR(MAX)
,Execstatus BIT
)
DECLARE #SQL VARCHAR(MAX)
DECLARE #TableParamSQL VARCHAR(MAX)
DECLARE #SchemaParamSQL VARCHAR(MAX)
DECLARE #TblSQL VARCHAR(MAX)
DECLARE #tmpTblname sysname
DECLARE #ErrMsg VARCHAR(100)
/*
IF LTRIM(RTRIM(#Tablenames)) IN ('' ,'%')
BEGIN
INSERT INTO #CheckTableNames
SELECT Name
FROM sys.tables
END
ELSE
BEGIN
IF CHARINDEX(',',#Tablenames) > 0
SELECT #SQL = 'SELECT ''' + REPLACE(#Tablenames,',','''as TblName UNION SELECT ''') + ''''
ELSE
SELECT #SQL = 'SELECT ''' + #Tablenames + ''' as TblName '
SELECT #TblSQL = 'SELECT T.NAME
FROM SYS.TABLES T
JOIN (' + #SQL + ') tblsrc
ON T.name LIKE tblsrc.tblname '
INSERT INTO #CheckTableNames
EXEC(#TblSQL)
END
*/
--IF LTRIM(RTRIM(#Tablenames)) = ''
--BEGIN
-- SELECT #Tablenames = '%'
--END
IF LTRIM(RTRIM(#SchemaNames)) =''
BEGIN
SELECT #SchemaNames = '%'
END
--IF CHARINDEX(',',#Tablenames) > 0
-- SELECT #TableParamSQL = 'SELECT ''' + REPLACE(#Tablenames,',','''as TblName UNION SELECT ''') + ''''
--ELSE
-- SELECT #TableParamSQL = 'SELECT ''' + #Tablenames + ''' as TblName '
IF CHARINDEX(',',#SchemaNames) > 0
SELECT #SchemaParamSQL = 'SELECT ''' + REPLACE(#SchemaNames,',','''as SchemaName UNION SELECT ''') + ''''
ELSE
SELECT #SchemaParamSQL = 'SELECT ''' + #SchemaNames + ''' as SchemaName '
SELECT #TblSQL = 'SELECT SCh.NAME,T.NAME
FROM SYS.TABLES T
JOIN SYS.SCHEMAS SCh
ON SCh.SCHEMA_ID = T.SCHEMA_ID
INNER JOIN [DynaForms].[dbo].[Enums_Tables] et on
(et.Id = T.NAME COLLATE Latin1_General_CI_AS)'
INSERT INTO #CheckTableNames
(Schemaname,Tablename)
EXEC(#TblSQL)
IF NOT EXISTS(SELECT 1 FROM #CheckTableNames)
BEGIN
SELECT #ErrMsg = 'No tables are found in this database ' + DB_NAME() + ' for the specified filter'
PRINT #ErrMsg
RETURN
END
IF LTRIM(RTRIM(#SearchStr)) =''
BEGIN
SELECT #ErrMsg = 'Please specify the search string in #SearchStr Parameter'
PRINT #ErrMsg
RETURN
END
ELSE
BEGIN
SELECT #SearchStr = REPLACE(#SearchStr,',,,',',#DOUBLECOMMA#')
SELECT #SearchStr = REPLACE(#SearchStr,',,','#DOUBLECOMMA#')
SELECT #SearchStr = REPLACE(#SearchStr,'''','''''')
SELECT #SQL = 'SELECT ''' + REPLACE(#SearchStr,',','''as SearchString UNION SELECT ''') + ''''
INSERT INTO #SearchStringTbl
(SearchString)
EXEC(#SQL)
UPDATE #SearchStringTbl
SET SearchString = REPLACE(SearchString ,'#DOUBLECOMMA#',',')
END
INSERT INTO #SQLTbl
( Tablename,WHEREClause)
SELECT QUOTENAME(SCh.name) + '.' + QUOTENAME(ST.NAME),
(
SELECT '[' + SC.Name + ']' + ' LIKE ''' + REPLACE(SearchSTR.SearchString,'''','''''') + ''' OR ' + CHAR(10)
FROM SYS.columns SC
JOIN SYS.types STy
ON STy.system_type_id = SC.system_type_id
AND STy.user_type_id =SC.user_type_id
CROSS JOIN #SearchStringTbl SearchSTR
WHERE STY.name in ('varchar','char','nvarchar','nchar','text')
AND SC.object_id = ST.object_id
ORDER BY SC.name
FOR XML PATH('')
)
FROM SYS.tables ST
JOIN #CheckTableNames chktbls
ON chktbls.Tablename = ST.name
JOIN SYS.schemas SCh
ON ST.schema_id = SCh.schema_id
AND Sch.name = chktbls.Schemaname
WHERE ST.name <> 'SearchTMP'
GROUP BY ST.object_id, QUOTENAME(SCh.name) + '.' + QUOTENAME(ST.NAME) ;
UPDATE #SQLTbl
SET SQLStatement = 'SELECT * INTO SearchTMP FROM ' + Tablename + ' WHERE ' + substring(WHEREClause,1,len(WHEREClause)-5)
DELETE FROM #SQLTbl
WHERE WHEREClause IS NULL
WHILE EXISTS (SELECT 1 FROM #SQLTbl WHERE ISNULL(Execstatus ,0) = 0)
BEGIN
SELECT TOP 1 #tmpTblname = Tablename , #SQL = SQLStatement
FROM #SQLTbl
WHERE ISNULL(Execstatus ,0) = 0
IF #GenerateSQLOnly = 0
BEGIN
IF OBJECT_ID('SearchTMP','U') IS NOT NULL
DROP TABLE SearchTMP
EXEC (#SQL)
IF EXISTS(SELECT 1 FROM SearchTMP)
BEGIN
SELECT Tablename=#tmpTblname,* FROM SearchTMP
SELECT #MatchFound = 1
END
END
ELSE
BEGIN
PRINT REPLICATE('-',100)
PRINT #tmpTblname
PRINT REPLICATE('-',100)
PRINT replace(#SQL,'INTO SearchTMP','')
END
UPDATE #SQLTbl
SET Execstatus = 1
WHERE Tablename = #tmpTblname
END
IF #MatchFound = 0
BEGIN
SELECT #ErrMsg = 'No Matches are found in this database ' + DB_NAME() + ' for the specified filter'
PRINT #ErrMsg
RETURN
END
SET NOCOUNT OFF
Sorry in advance with the weird formatting, I can't put it more readable. I hope it helps someone. I also want to give credit to the onwer of the original stored procedure in here.
That stored procedure you linked to already has logic to check the table names in the database and populates a table variable with a list of tables to check. Just change this logic to Select from your ENUM_TABLES table instead. This could be based on an input parameter of #Id if you like...
In simple terms:
Remove the parameter #TableNames from the stored procedure
(optionally) replace the parameter with #ENUM_TABLE_ID or something
Change code in SP that looks like this:
IF LTRIM(RTRIM(#Tablenames)) = ''
/* Removed a load of lines looking at #TableNames...... */
....
SELECT #TblSQL = 'SELECT SCh.NAME,T.NAME
FROM SYS.TABLES T
JOIN SYS.SCHEMAS SCh
ON SCh.SCHEMA_ID = T.SCHEMA_ID
JOIN (' + #TableParamSQL + ') tblsrc
ON T.name LIKE tblsrc.tblname
JOIN (' + #SchemaParamSQL + ') schemasrc
ON SCh.name LIKE schemasrc.SchemaName
With something more like this:
SELECT #TblSQL = 'SELECT SCh.NAME,T.NAME
FROM SYS.TABLES T
JOIN SYS.SCHEMAS SCh
ON SCh.SCHEMA_ID = T.SCHEMA_ID
INNER JOIN ENUM_TABLES et on
(et.TABLENAME=T.NAME)
and (et.Id='+#ENUM_TABLE_ID+')'
And then I think it'll do what you want (lookup the list of tables from another table, based on an ID passed into the stored procedure)
(apologies for the slightly weird formatting of the SQL above; for some reason the SO markdown processor really didn't like that stuff, but it is hopefully readable. If anyone wants to try to edit this to improve it, be my guest.)
I am working on a project and I got stuck with a query in which I want to get the specific column name of a table whose value is "no."
I have a table with name subscription and it has four fields; id(integer), email(varchar), sms(varchar), phone(varchar) and my email, sms and phone field have values either 'yes' or 'no'.
Now I want to retrieve the name of only those columns which has a value 'no'.
I want to execute this query in mysql.
I have tried the following query which is returning me the complete row wherever there is even one occurence of 'no':
SELECT * FROM test.subscription WHERE 'no' IN (email,sms,phone);
Like i have these two rows now i want to select the column name where value='no' and id=1
How about something cheap and cheerful using a case statement like:
SELECT ID, 'ColName' = CASE
WHEN email = 'no' THEN 'email'
END,
'ColName2' = CASE
WHEN sms = 'no' THEN 'sms'
END,
'ColName3' = CASE
WHEN phone = 'no' THEN 'phone'
END
FROM subscription
where ID = 2
I cant put this as a comment because of less privileges, but if you are looking to search a value which is held by a table (could be any column) - you might check this SO post
Using the code from the same post -
DECLARE #Results TABLE(ColumnName nvarchar(370), ColumnValue nvarchar(3630))
DECLARE #SearchStr nvarchar(100)
DECLARE #TableName nvarchar(256), #ColumnName nvarchar(128), #SearchStr2 nvarchar(110)
SET #TableName = 'no'
SET #SearchStr2 = QUOTENAME('%' + 'no' + '%','''')
SET #ColumnName = ''
SET #TableName = '[test].[dbo].[subscription]'
WHILE (#TableName IS NOT NULL) AND (#ColumnName IS NOT NULL)
BEGIN
SET #ColumnName =
(
SELECT MIN(QUOTENAME(COLUMN_NAME))
FROM INFORMATION_SCHEMA.COLUMNS
WHERE TABLE_SCHEMA = PARSENAME(#TableName, 2)
AND TABLE_NAME = PARSENAME(#TableName, 1)
AND DATA_TYPE IN ('char', 'varchar', 'nchar', 'nvarchar')
AND QUOTENAME(COLUMN_NAME) > #ColumnName
)
IF #ColumnName IS NOT NULL
BEGIN
INSERT INTO #Results
EXEC
(
'SELECT ''' + #TableName + '.' + #ColumnName + ''', LEFT(' + #ColumnName + ', 3630)
FROM ' + #TableName + ' (NOLOCK) ' +
' WHERE ' + #ColumnName + ' LIKE ' + #SearchStr2
)
END
END
SELECT ColumnName, ColumnValue FROM #Results
If i got the Question right, i think the following Query might work
SELECT *
FROM test.subscription
WHERE 1=1
and
(email = 'no'
or
email = 'no'
or
sms = 'no'
)
and id=(your values)