Can we use cursors in functions?
The use of the cursor The main function of the cursor is Retrieve data, one row at a time, from the result set, unlike SQL commands that operate on all rows in the result set at once. Cursors are used when a user needs to update records in a database table either in a singleton manner or row by row.
Can a function return a cursor?
A stored function can only return a cursor as its return value; However, cursor functions can return additional result sets in other ways (Oracle functions can use output cursor parameters for them).
What is the role of the cursor?
Cursor by Database programmers process individual rows returned by database system queries. Cursors can operate on the entire result set at once. In this case, the cursor can process the rows in the result set sequentially.
Why shouldn’t cursors be used?
Cursors can be used in some applications for serialization operations, as in the example above, but they should generally be avoided because they negatively impact performanceespecially when operating on large amounts of data.
SQL cursors – how and when to use them
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