i created a table with 2 columns( character(1));
i like to have first column unique and also the second column.
First column should accept only the unique entries ,Even the second column
<b>A</b> C . this combination should not be allowed. because A is repeated in column 1.
C <b>B </b>. this shouldnt be allowed as column 2 needs column 2 unique.
Ur help is appreciated