Question

Combination key does not contain any duplicate data. ​

Answer 1

Answer:

$<p style="color:cyan;font-family:cursive;background:black;font size:25px;">HEYA BUDDY ❄$

$<p style="color: orange;font-family:cursive;background:black;font size:25px;">In a composite key the values of both columns together has to be unique and not null . Individual column can have duplicate values but the multiple columns which make up the composite key together cannot have duplicate value .$