Question

I have a table like this:

ObjId OtherObjId active (bool)
1          5       0
1          7       1
1          9       0
2          6       0
...
...
...
54         5       0
54         7       1
54         9       0

This two queries return an identical result:

select OtherObj2,active from MyTable where ObjId1 = 1;

select OtherObj2,active from MyTable where ObjId1 = 54;

I would like to run a single query that return return true if the two query result are identical or false if they are not.

The table is a configuration table and I want to test easily if two object have the same configuration. I can perform the check using a store procedure, however I would like to avoid to use it.

I cannot think a way to check it using a query, I am wondering if it is possible.

Any hints?

Thanks for your help.

Answer 1

Don’t know if your DBMS supports except but if it does you can use this.

select OtherObjId, active
from MyTable
where ObjId = 1
except
select OtherObjId, active
from MyTable
where ObjId = 54