Question

I want to create a temporary table in a dynamic query and use it afterwards. It will be created from a permanent table:

create table t (a integer);
insert into t values (1);

And the temp table creation is like this:

declare @command varchar(max) = '
    select *
    into #t
    from t
    ;
    select * from #t;
';
execute (@command);

When the @command is executed the select from the temporary table works.

Now if I select from the temporary table an error message is shown:

select * from #t;

Invalid object name '#t'

If the temporary table is created outside of the dynamic query it works:

select top 0 *
into #t
from t

declare @command varchar(max) = '
    insert into #t
    select *
    from t
';
execute (@command);

select * from #t;

Is it possible to persist a dynamically created temporary table?

Answer 1

You can also create global temporary tables. For example, ##MyTemp.
But, global temporary tables are visible to all SQL Server connections.