Null values in sql | null values in sql | sql server interview question and answer | sql part 22

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[GaneshNaduvathati]

create table Nullvalues_Tbl
(
id int,
val int
)
insert into Nullvalues_Tbl
select 1, 10
union
select 1, 11
union
select 1, NULL
union
select 1, NULL
union
select 2, 10
union
select 3, NULL
union
select 4, NULL
union
select 4, NULL
union
select 5, 10

SELECT * FROM Nullvalues_Tbl

[mohneeshmalik]

Can anyone help why order by 1 was used. Instead of Order by id