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Oracle Database Advanced PL SQL 12c 1z0 148

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The STUDENTS table exists in your schema.
Examine the DECLARE section of a PL/SQL block:

Which two blocks are valid? (Choose two.)

BEGIN OPEN cursor3 FOR SELECT * FROM students; cursor1 :=cursor3; END;
BEGIN OPEN stcur; cursor1 :=stcur; END
BEGIN OPEN cursor1 FOR SELECT * FROM students; stcur :=cursor1; END;
BEGIN OPEN stcur; cursor3 :=stcur; END;
BEGIN OPEN cursor1 FOR SELECT * FROM students; cursor2 :=cursor1; END

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