Question

I need to create table on the fly in C#.net program. Task is to export excel file to SQL Database. How to write store procedure for creating table if column name and table name are passed as parameters? I tried to write following SP.

ALTER PROCEDURE dbo.CreateTempTable @Param1 VarChar(50), @Param2 VarChar(50), @Param3 VarChar(50), @Param4 VarChar(50) AS if exists(select * from sys.objects where object_id = OBJECT_ID('[dbo].[Temp]') AND type='U') begin Drop Table [dbo].[Temp] end  Create Table [dbo].[Temp]([@CountryID] [int], [@Param1] [VarChar](150), [@Param2] [DateTime], [@Param3] [VarChar](50), [@Param4] [VarChar](50));  RETURN 

While executing if I give input as

@Param1 - 'CountryId' @Param2 - 'CountryName' @Param3 - 'CreateDate' @Param4 - 'CreatedBy' 

The column created as @Param1, @Param2, @Param3, @Param4 instead of CountryId… etc.

Answer 1

The body of your sproc should be

 exec ('CREATE TABLE [dbo.Temp] (' + @param1 + ' int,' + @param2 + ' [DateTime], ' + @Param3 + ' VarChar, ' + @Param4 + ' VarChar)')   

Although, as you’re calling it from .net, you might as well just build up a string in .net and execute that as inline SQL…

eg:

  string sql = string.Format('CREATE TABLE [dbo.Temp] ({0} int, {1} [DateTime], {2} VarChar, {3} VarChar)', fieldName1, fieldName2, fieldName3, fieldName4);    

And then just execute that as SQL.