What Is INACTIVE Delete?

Here are two tables. How do i create an SP for INACTIVE delete and how do i use the UNIQUE constraint to avoid duplication of the NAME columns(logingroup_name and login_name) in these tables?

--Creating Table ref_LoginGroup:-
create table ref_LoginGroup
(
logingroupid tinyint identity(1,1) constraint pklogingroupid primary key clustered,
logingroup_name varchar(25) constraint chkname check(logingroup_name NOT LIKE '% %'),
changed_login_id int,
is_active bit,
lastupdr smalldatetime,
)
--Creating Unique nonclustered Index for ref_LoginGroup:-
create unique nonclustered index idxlgn on ref_LoginGroup(logingroup_name)


--Creating Table ref_Login:-
create table ref_Login
(
login_id int identity(1,1) constraint pkloginid primary key clustered,
login_name varchar(50) constraint chklogname check(login_name NOT LIKE '% %'),
firstname varchar(30),
lastname varchar(30),
logingroupid tinyint constraint fklogingroupid foreign key references ref_LoginGroup(logingroupid),
changed_login_id int,
is_active bit,
lastupdr smalldatetime
)
--Creating Unique nonclustered Index for ref_Login:-
create unique nonclustered index idxl on ref_Login(login_name)