drop table if exists TestTable 

-- NEWID

create table TestTable (
   id uniqueidentifier default newid() not null primary key clustered,
   sequence int not null,
   data char(250) not null default '');
go


-- Insert 50,000 rows.
declare @count int;
set @count = 0;
while @count < 50000 begin
   insert TestTable (sequence)
   values (@count);

   set @count = @count + 1;
end;
go


-- Get the number of read / writes for this session...
select reads, writes
from sys.dm_exec_sessions
where session_id = @@spid;

-- Get the page fragmentation and density at the leaf level.
select index_type_desc, index_depth, page_count, avg_page_space_used_in_percent, avg_fragmentation_in_percent, record_count
from sys.dm_db_index_physical_stats(db_id(), object_id('TestTable'), null, null, 'detailed')
where index_level = 0;
go

drop table if exists TestTable 
go

-- NEWSEQUENTIALID

create table TestTable (
   id uniqueidentifier default newsequentialid() not null primary key clustered,
   sequence int not null,
   data char(250) not null default '');
go 


-- Insert 50,000 rows.
declare @count int;
set @count = 0;
while @count < 50000 begin
   insert TestTable (sequence)
   values (@count);

   set @count = @count + 1;
end;
go


-- Get the number of read / writes for this session...
select reads, writes
from sys.dm_exec_sessions
where session_id = @@spid;

-- Get the page fragmentation and density at the leaf level.
select index_type_desc, index_depth, page_count, avg_page_space_used_in_percent, avg_fragmentation_in_percent, record_count
from sys.dm_db_index_physical_stats(db_id(), object_id('TestTable'), null, null, 'detailed')
where index_level = 0;
go

-- Insert 50,000 rows.
declare @count int;
set @count = 0;
while @count < 50000 begin
   insert TestTable (sequence)
   values (@count);

   set @count = @count + 1;
end;
go


-- Get the number of read / writes for this session...
select reads, writes
from sys.dm_exec_sessions
where session_id = @@spid;

-- Get the page fragmentation and density at the leaf level.
select index_type_desc, index_depth, page_count, avg_page_space_used_in_percent, avg_fragmentation_in_percent, record_count
from sys.dm_db_index_physical_stats(db_id(), object_id('TestTable'), null, null, 'detailed')
where index_level = 0;
go