1.局部变量和循环变量同名,出了循环还是局部变量 declare i number; begin i:=0; for i in 1..3 loop dbms_output.put_line(i); end loop; dbms_output.put_line('------'); dbms_output.put_line(i); end; / 1 2 3 ------ 0
--标号的新用法
BEGIN <<outer_loop>> FOR i IN 1..3 LOOP -- assign the values 1,2,3 to i <<inner_loop>> FOR i IN 1..3 LOOP IF outer_loop.i = 2 THEN DBMS_OUTPUT.PUT_LINE( 'outer: ' || TO_CHAR(outer_loop.i) || ' inner: ' || TO_CHAR(inner_loop.i)); END IF; END LOOP inner_loop; END LOOP outer_loop; END;