We can use the ANDoperator for the union !!? what is the difference between using conditions combined them with AND and UNION

Question

UNION && AND

Answer 1

union is used to make a general variable that can store any type (which are types of members)
so when assigning a value to a member in a union variable , the old value will be lost

and checks if the left value is non-zero AND the right value is non-zero to return 1 or 0
and cannot store but union can

I think I didn't understand again

Answer 2

I didn't understand
can you elaborate please

Answer 3

welcome
I hope that you got what you're looking for

Answer 4

I'm sorry I didn't pay attention to the lesson

1/UNION combines multiple datasets into a single dataset.
and
2/when we are using AND to assemble conditions in WHERE
Also combines multiple datasets to single dataset.
Where is the difference between using 1 and using 2 ?
the same thing with INTERSECT and OR

Or there is no difference🙄🙄

Answer 5

ABADA S 😃😃
Thank you very much I understand u