Using a comma-separated parameter in an IN clause

问题

I have 'param1, param2, parma3' coming from SSRS to a stored procedure as a varchar parameter: I need to use it in a query's IN clause but then need to change its format like this first:

select *
from table1
where col1 in('param1', 'param2', 'param3')

What is the best way to reformat the parameter without creating functions and parameter tables?

回答1:

Try this one, Just need to add commas at the beginning and at the end of @params string.

Declare @params varchar(100) Set @params = ',param1,param2,param3,'

Select * from t
where CHARINDEX(','+cast(col1 as varchar(8000))+',', @params) > 0

SQL FIDDLE

回答2:

you can use split function and use it as in following way here my split fnSplitString return splitdata

select * from tb1 where id in(select splitdata from dbo.fnSplitString((select col1 from tb12 where id=3),','))


create FUNCTION [dbo].[fnSplitString] 
( 
    @string NVARCHAR(MAX), 
    @delimiter CHAR(1) 
) 
RETURNS @output TABLE(splitdata NVARCHAR(MAX) 
) 
BEGIN 
    DECLARE @start INT, @end INT 
    SELECT @start = 1, @end = CHARINDEX(@delimiter, @string) 
    WHILE @start < LEN(@string) + 1 BEGIN 
        IF @end = 0  
            SET @end = LEN(@string) + 1

        INSERT INTO @output(splitdata)  
        VALUES(SUBSTRING(@string, @start, @end - @start)) 
        SET @start = @end + 1 
        SET @end = CHARINDEX(@delimiter, @string, @start)

    END 
    RETURN 
END

回答3:

If you are using SQL 2016 and above string_split you can use.

-- @param is where you keep your comma separated values example: 
declare @param = 'param1,param2,param3'
select * from table1 where col1 in (select TRIM(value) from string_split(@param,',')

More information about string_split check offical documemt

Furthermore, TRIM() is used to trim values from white spaces.

回答4:

Load the Params into a string and execute as an sql :

declare @param varchar(1000) = 'param1, param2, parma3'
declare @sql varchar(4000)
select @sql = 
'select *
from table1
where col1 in(''' + replace(@param,',',''',''') + ''')'

-- print @sql -- to see what you're going to execute
exec sp_executesql @sql

回答5:

"Best way" is arguable, but one classic approach that remains without "creating functions and table parameters" is to simply employ dynamic SQL in the stored procedure:

-- FORNOW: local to act as the SP param and arg
declare @values varchar(100) = 'param1, param2, param3'

-- Add opening and closing single quotes, then quotes around each
-- comma-separated list item.
select @values = '''' + REPLACE(@values, ', ', ''', ''') + ''''

-- FORNOW: for clarity/debugging
print @values
--'param1', 'param2', 'param3'

-- Run the desired query as dynamic SQL.
DECLARE @sql as nvarchar(250);
SET @sql = 'select * from table1 where col1 in (' + @values + ')';

EXEC sp_executesql @sql;

This assumes a couple things, though:

That commas in the list of values are followed by a space. Variations on this solution can address deviations in this respect of course, but it is important to be aware of this assumption.
That the comma-separated values do not themselves have commas in them – unlikely but worth mentioning since whether values will satisfy this constraint sometimes goes unconsidered.

回答6:

We can use STRING_SPLIT() in SQL SERVER

DECLARE @params varchar(max)= 'param1,param2,param3'

SELECT *
FROM table1
WHERE col1 IN (SELECT value FROM STRING_SPLIT( @params , ','))

来源：https://stackoverflow.com/questions/27606091/using-a-comma-separated-parameter-in-an-in-clause

标签

sql

tsql

stored-procedures

reporting-services

parameters