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CREATE  TABLE  ADVERTISE_CATEGORY
(
       CATEGORY_ID       NUMBER PRIMARY KEY,  --½ÚµãID 
       CATEGORY_NAME     VARCHAR2(500),       --½ÚµãÃû×Ö 
       PARENT_ID         NUMBER                          --¸¸½ÚµãID
)
±íÊý¾Ý
ɾ³ý ½ÚµãIDΪ1µÄ´æ´¢¹ý³Ì
create or replace procedure sp_advertise_category_del
(
       v_cate_id  in number
)
 is
 begin
       delete from advertise_category where category_id in
        (select category_id from advertise_category  start with category_id=v_cate_id connect by prior category_id = parent_id);
 end;


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select a.constraint_name, a.table_name, b.constraint_name 
from user_constraints a, user_constraints b
where a.constraint_type = 'R' 
and b.constraint_type = 'P' 
and a.r_constraint_name = b.constraint_name
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