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TYPE ref_type_name IS REF CURSOR [RETURN return_type];
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cursor_name ref_type_name;
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Declare
type rc is ref cursor;
cursor c is select * from dual;
l_cursor rc;
begin
if ( to_char(sysdate,'dd') = 30 ) then
       open l_cursor for 'select * from emp';
elsif ( to_char(sysdate,'dd') = 29 ) then
       open l_cursor for select * from dept;
else
       open l_cursor for select * from dual;
end if;
open c;
end;
/
l          rc¸ù¾ÝÂß¼­¶¯Ì¬´ò¿ª£»¶øÓαêc¶¨ÒåºÃÁËÖ»ÓоÍÎÞ·¨ÐÞ¸ÄÁË¡£
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3 code VARCHAR2(10),
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5 CONSTRAINT source_pk PRIMARY KEY (id)
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