Column comparison SQL issue in MS Access - sql

Question

I have the following query and needs to get the mismatch column records in MS Access.
The issue is when there are more than one records with same link column value, matching is not happening properly
Query
SELECT
T1Col1,
T1Col2,
T2Col1,
T2Col2
FROM T1
INNER JOIN T2
ON T1.Col1 = T2.Col1
WHERE T1.Col2 <> T2.Col2
After executing I am getting below kind of results which is not correct
T1Col1 T1Col2 T2Col1 T2Col2
abc ccc abc eee
abc eee abc ccc
Ideally above records should not return in the result set as those matches (checking for not matching ones). Do I need to change anything in the query to get the correct results
T1
T1Col1 T1Col2
jkl ttt
efg qqq
efg mmm
abc ccc
abc eee
T2
T2Col1 T2Col2
jkl sss
efg uuu
efg mmm
abc eee
abc ccc
Expected results would be
T1Col1 T1Col2 T2Col1 T2Col2
jkl ttt jkl sss
efg qqq efg uuu

Answer 1

I doubt this is the most efficient solution, but it'll work.
The problem with a simple join is that you are performing a cartesian join of ALL records in T1 with ALL records in T2, then deleting the ones that fail your criteria. Thus, you get results you're not asking for, because you're not doing the query that matches your english (or native-language-of-your-choice). SQL is great that way - most of the time, if you just say out loud what you want, exactly, the SQL matches.
What you want:
Select those rows from T1 where there is no row in T2 with the same
value for COL1 and COL2. Then select those rows from T2 where there
is no row in T1 with the same value for COL1 and COL2. Then match
these two result sets up to each other by COL1.
So, here you go:
create table t3 as
select * from
(select * from t1 where not exists (select 1 from T2 where T1col1=t2col1 and t1col2=t2col2)) M1,
(select * from t2 where not exists (select 1 from T1 where T1col1=t2col1 and t1col2=t2col2)) M2
where M1.t1col1=M2.t2col1;