TSQL Comparing two Sets

Question

When two sets are given

s1 ={ a,b,c,d} s2={b,c,d,a}

(i.e)

TableA

Item
a
b
c
d

TableB

Item
b
c
d
a

How to write Sql quer

Answer 1

Watch out, I'm gonna use a Cross Join.

Declare @t1 table(val varchar(20))
Declare @t2 table(val varchar(20))


insert into @t1 values ('a')
insert into @t1 values ('b')
insert into @t1 values ('c')
insert into @t1 values ('d')


insert into @t2 values ('c')
insert into @t2 values ('d')
insert into @t2 values ('b')
insert into @t2 values ('a')

select 
    case when 
    count(1) = 
    (((Select count(1) from @t1) 
    + (Select count(1) from @t2)) / 2.0) 
    then 1 else 0 end as SetsMatch  from 
@t1 t1 cross join @t2 t2 
where t1.val = t2.val