Query Designer - 7.2 and 7.3

Hi Experts,

I have a question reg the Query Designer.

We have 2 versions of Query DEsigner - 7.2 and 7.3. I believe that queries created in 7.2 can be changed and saved in 7.3. But once saved in 7.3, the changes cannot be made in 7.2.

Similarly, a query created in 7.3 cannot be changed and saved in 7.2.

So, now my question, I have to create a Y query(copy query) from Z query. Can I do this in any version? If I save the query in 7.3, will it affect the Z query(assuming it is in 7.2)?

Regards,

Yamini P