sql - I am trying to use table variable as a dbname to iterate through multiple databases -


i trying execute following piece of code:

use projects  set nocount on  create table #t (dbname varchar(20),  col2 datetime)  declare @sql nvarchar(max)  declare @proc_sql nvarchar(max)  declare @table_car table (rowid int not null primary key identity(1,1), carrier varchar(500))  insert @table_car (carrier)  select distinct t.db_name table t with(nolock)                  inner join table_t1  t1 with(nolock) on t.id = t1.id                            declare @rowstoprocess int  declare @currentrow int  declare @dbname varchar(500)  set @rowstoprocess = @@rowcount  set @currentrow = 0  while @currentrow < @rowstoprocess  begin      set @currentrow = @currentrow+1      select @dbname = carrier         @table_car         rowid = @currentrow          select @sql = '         insert #t (dbname, col2)         select distinct db_name(), col_x from'+@dbname+'..table_xyz'         set @proc_sql = replace(@sql,   @dbname, @dbname)         exec (@proc_sql)  end

however, when execute this, getting error:

msg 102, level 15, state 1, line 3 incorrect syntax near '.'.

which believe has nothing line 3 has syntax error near @dbname variable being used inside while loop. please help

i believe missing space between right after in "col_x from'+@db_name". should this: 

select distinct db_name(), col_x '+@dbname+'..table_xyz' -------------------------------------^

one thing can print out sql strings when debugging , run them on own. easier debug. in example, instead of exec (@proc_sql) print @proc_sql.


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