I am working on this but am not sure if have this correctly. it is basically asking to Find all the possible super keys from the given relation. It seems that OrderID, productID, and OrderDate are the only unique columns.

\begin{tabular}{|l|l|l|l|l|} \hline OrderiD & CustomerlD & ProductiD & Quantity & OrderDate \\ \hline 1 & 101 & 201 & 5 & 20210101 \\ \hline 2 & 101 & 202 & 2 & 20210102 \\ \hline 3 & 102 & 203 & 1 & 20210103 \\ \hline 4 & 103 & 204 & 4 & 20210104 \\ \hline 5 & 104 & 205 & 3 & 20210105 \\ \hline 6 & 105 & 206 & 2 & 20210106 \\ \hline 7 & 106 & 207 & 1 & 20210107 \\ \hline 8 & 107 & 208 & 2 & 20210108 \\ \hline 9 & 108 & 209 & 3 & 20210109 \\ \hline 10 & 109 & 210 & 4 & 20210110 \\ \hline \end{tabular}