Need an efficient way to perform the given SQL query in SQL Server, stored procedure -

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i have problem have create tables on basis of number of parameters passed in stored procedure follows:

----when there 1 column 'create table [dbo].['+@table_name+'] (                   ['+@colname1+'] [varchar](200)                   ) ' ----when there 2 column                      'create table [dbo].['+@table_name+'] (         ['+@colname1+'] [varchar](200),         ['+@colname2+'] [varchar](200)                   ) ;'  ----when there 3 column              'create table [dbo].['+@table_name+'] (                   ['+@colname1+'] [varchar](200),                   ['+@colname2+'] [varchar](200),                   ['+@colname3+'] [varchar](200)                   ) '

one way know of doing is:

----when there 1 column if ((@colname1 not null , len(@colname1) !=0))  begin 'create table [dbo].['+@table_name+'] (                   ['+@colname1+'] [varchar](200)                    )' end ----when there 2 column                      if ((@colname1 not null , len(@colname1) !=0)   , (@colname2 not null , len(@colname2) !=0))  begin drop table [dbo].['+@table_name+'] 'create table [dbo].['+@table_name+'] (                   ['+@colname1+'] [varchar](200),                   ['+@colname2+'] [varchar](200)                   )' end                    ----when there 3 column              if ((@colname1 not null , len(@colname1) !=0)   , (@colname2 not null , len(@colname2) !=0)  , (@colname3 not null , len(@colname3) !=0))  begin drop table [dbo].['+@table_name+'] 'create table [dbo].['+@table_name+'] (                   ['+@colname1+'] [varchar](200),                   ['+@colname2+'] [varchar](200),                   ['+@colname3+'] [varchar](200)                   ) ' end

by using way, code becomes lengthy. there other efficient way this. if instead of passing values @colname1, @colname2,@colname3 separately, pass values in 1 single parmaeter @colname @colname = 'col1,col2,col3', how can it?

it possible use dynamic sql , comma delimited parameter column names, though wrote in comment, bad idea, , recommend re-think approach. using "xml split string technique" , quotename minimize sql injection hazard:

create procedure stpcreatetabledynamically (     @table_name sysname,      @column_names nvarchar(max) )       declare @sql nvarchar(max)      select @sql = 'create table [dbo].' + quotename('zzz_'+ @table_name) +' ('      select @sql = @sql + quotename(split.a.value('.', 'varchar(100)')) + ' [varchar](200),'       (select cast ('<m>' + replace(@column_names, ',', '</m><m>')+ '</m>' xml) data)             cross apply data.nodes ('/m') split(a);       select @sql = left(@sql, len(@sql) - 1) + ') on [zzz_fg];'      print @sql     --exec(@sql)  go

usage: 

exec stpcreatetabledynamically 'mytable', 'column1,col2,col3'

output: 

create table [dbo].[zzz_mytable] ([column1] [varchar](200),[col2] [varchar](200),[col3] [varchar](200)) on [zzz_fg];

once see output ok, can unremark exec line , delete print line.


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