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/*²»´øÈκβÎÊý´æ´¢¹ý³Ì(Êä³öϵͳÈÕÆÚ)*/
create or replace procedure output_date is
begin
dbms_output.put_line(sysdate);
end output_date;
/*´ø²ÎÊýinºÍoutµÄ´æ´¢¹ý³Ì*/
create or replace procedure get_username(v_id in number,v_username out varchar2)
as
begin
  select username into v_username from tab_user where id = v_id; --±äÁ¿¸³Öµ
exception
when no_data_found then
raise_application_error(-20001,'ID²»´æÔÚ!');
end get_username;


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·½·¨2£º¿ªÊ¼²Ëµ¥--ÔËÐÐ--“ÊäÈë” rman target username/userpwd@Orcl £¬£¨ºìÉ«×ÖÌå±íʾÊý¾Ý¿âʵÀýÃû£©»Ø³µ£¬´ò¿ªµÄrmanÃüÁîÐд°¿Ú£¬ÒѾ­Á¬½ÓÉÏÊ ......

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SELECT UPPER(F.TABLESPACE_NAME) "±í¿Õ¼äÃû",
       D.TOT_GROOTTE_MB "±í¿Õ¼ä´óС(M)",
       D.TOT_GROOTTE_MB - F.TOTAL_BYTES "ÒÑʹÓÿռä(M)",
       TO_CHAR(ROUND((D.TOT_GROOTTE_ ......

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SELECT * from 
(
SELECT A.*, ROWNUM RN 
from (SELECT * from TABLE_NAME) A 
WHERE ROWNUM <= 40
)
WHERE RN >= 21
ÆäÖÐ×îÄÚ²ãµÄ²éѯSELECT * from TABLE_NAME±íʾ²»½øÐз­Ò³µÄԭʼ²éѯÓï¾ä¡£ROWNUM <= 40ºÍRN >= 21¿ØÖÆ·ÖÒ³²éѯµÄÿҳµÄ·¶Î§¡£
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select t.*,i.index_type from user_ind_columns t,user_indexes i where t.index_name = i.index_name and t.table_name = i.table_name and t.table_name = Òª²éѯµÄ±í
2¡¢²éÕÒ±íµÄÖ÷¼ü£¨°üÀ¨Ãû³Æ£¬¹¹³ÉÁУ©£º
select cu.* from user_cons_columns cu, user_constr ......
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