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You must declare and define an explicit cursor, giving it a name and associating it with a query (typically, the query returns multiple rows).
Then you can process the query result set in either of these ways: do those things with a cursor variable (see "Cursor Variables").')'); DBMS_OUTPUT.
If you close and immediately reopen an explicit cursor, PL/SQL does not reparse the associated query. To save an attribute value for later use, assign it to a local variable immediately.