Cursors pl sql updating
The caller of the function can process the result set based on the cursor reference.
If we process it at once, we may have a memory overflow error.
To access to a cursor, you need to declare a cursor variable at the declaration section of a block.
Postgre SQL provides us with a special type called function accepts an argument that represents the release year of a film.
Once you have declared a record in your block, you can both read and change the record’s value.
You can do this at the record level or by referencing individual fields of that record, with the same dot notation used in SQL to refer to the column of a table.