Question

I am trying to take the different values between table2 to table1 (I should compare table2 to table1).
I tried with Join but unfortunately it doesn’t work for me (or simply I don’t know what to write).

table1:

id
---
1
2

table2:

id
---
4
5
7
2
3
1

Result should be – 4, 5, 7, 3

Answer 1

SELECT id
FROM [TableB]
WHERE NOT EXISTS(SELECT id FROM [TableA] WHERE [TableA].id=[TableB].id)