如何将列的字符串数组作为参数传递给SQL Server存储过程

Question

I have a comma delimited string with column names ie

"Column1, Column2, Column3" which will be passed as a parameter to the following stored procedure.

My Stored Procedure is as follows:

@ColNames VARCHAR(1000)

Select ROW_NUMBER() OVER (ORDER BY Column1, Column2, Column3) AS RowNum, 
Column1, Column2, Column3
INTO #Results
From Table A 

I want to replace the above hardcoded column names with the parameter @colNames . This will include splitting the comma delimited parameter into the individual column names.

Answer 1

You'd need to use dynamic SQL in this case and execute it with sp_executesql .
For example:

DECLARE @ColNames VARCHAR(1000)
DECLARE @sSQL NVARCHAR(MAX)

SET @ColNames ='Column1, Column2,...'

SET @sSQL = 'SELECT ' + @ColNames + ' FROM myTable....'

exec sp_executesql @sSQL

I also made a quick SQLFiddle to this.

Answer 2

You may try this :

CREATE PROCEDURE yourId (@columns VARCHAR(1000))
AS
BEGIN
DECLARE @s_query VARCHAR(MAX)

SET @s_query = 'Select ROW_NUMBER() OVER (ORDER BY ' + @columns + ') AS RowNum, ' + @columns + ' From A'

EXEC(@s_query)
END

this is for t sql syntax

If you need information on how to split a string, you may have a look on this thread : Split function equivalent in T-SQL?