Hi all!
So here is a problem refering at empty set:
How i can, first, verify if my column(respecti ve table) is empty, has now rows in it, and, second, after the verification set a value to it.
Example:
Having table: tableA
with columns: id_tableA, columnA, columnB
and no value's in it, absolutly empty.
Need something like this(writing in text...