How to make a query with dynamic column in sql server 2012 -

i have sample code below. result such takes these columns varchar type.

declare @col1 varchar(80)='[column1]' declare @col2 varchar(80)='[column2]' select @col1,@col2 mytable 

you have use dynamic sql:

declare @col1 varchar(80) = 'column1'; declare @col2 varchar(80) = 'column2';  declare @sql nvarchar(max);  select @sql = 'select ' + quotename(@col1) + ', ' + quotename(@col2) + ' mytable;';  exec sp_executesql @sql; 

note have make sure column names real column names. need parameterize query added security. if of these wrong, may create huge security problems.