Suppose this was the definition definition of your table and want to load data to it. For this example, we assume data are already validated - -- pre-validation is a central concept in bulk loading.
Present State
Here is what was already in the exam table.
=> select * from exam ;
fn | ln | exam | score
-----------+--------+------+-------
tambouras | vena | 4 | 97
sun | ugjn | 6 | 82
The TaskSuppose we need to load new data and erase old data.
SOLUTION