When two or more tables share the same number of columns, and when their corresponding columns share the same or compatible domains, they are said to be

:Union compatible

Explanation:

Two parameters are said to be similar or union compatible if both the parameter have similar attribute.

In DBMS, two table are said to be union compatible if they have same attribute and same attribute domain.

It help to draw the attention toward the structure of the table that shows that all the attribute on which table has been drawn are same in both given table.

well cos like a ds it doesn't really die out, unlike for example, fifa, they always come out with a new version, so lets say your fifa 18 is charging you to update the teams and stuff, so, if messi were to go to real madrid (never gonna happen) it would switch messi to the other team, until the owners of fifa come out with fifa 19, then the game would eventually stop updating, and back to the ds, it doesn't really stop working after sometime because there's lots of things that it could be used for, and idk if u know what i'm saying, but long story short, samsung, represents the ds, if they still work, and people love them but not the new version, the old version still works, so they don't really force people to buy new phones, get me?

it most likely is charging, however when using a hot spot, it drains straight through battery life.