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select C.column_name,C.TABLE_NAME from dba_tab_columns C where owner=''
²éÿ¸ö¿ÆÄ¿class ·ÖÊýscroǰÈýÃû
select id, name, class, scro
from (select row_number() over(partition by class order by scro desc) cnt,
id,
name,
class,
scro
from student) a
where a.cnt <= 3;
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select *
from (select rw.*, rownum
from (select *
from student d
where d.class = 'b'
order by d.scro desc) rw
where rw.id >= 1
order by rw.class desc) n
where rownum <= 3
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insert into table_a (id,name,age) select b.id,b.name,b.age from table_b;
--ɾ³ý±íÊý¾ÝµÄ´¥·¢Æ÷
CREATE OR REPLACE PROCEDURE delete_data
IS
BEGIN
delete from test ;
COMMIT;
EXCEPTION
WHEN NO_DATA_FOUND
THEN
NULL;
WHEN OTHERS
THEN
RAISE;
END delete_data;
--¶¨Ê±É¾³ý ÿ¸ô5·ÖÖÓÖ´ÐÐÒ»´ÎµÄ¼Æ»®
DECLARE
X NUMBER;
BEGIN
SYS.DBMS_JOB.SUBMIT
&nbs
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>select username from all_users;
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>select t.tablespace_name, round(sum(bytes/(1024*1024)),0) ts_size
from dba_tablespaces t, dba_data_files d
wher ......
CREATE OR REPLACE TYPE ty_str_array IS TABLE OF VARCHAR2 (4000);
CREATE OR REPLACE FUNCTION fn_split (p_str IN VARCHAR2, p_delimiter IN VARCHAR2)
RETURN ty_str_split
IS
j INT := 0;
i INT := 1;
len INT := 0;
&nbs ......
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"¿ÚÁP£©:"ÖÐÊäÈë'manager'
"Ö÷»ú×Ö·û´®£¨H£©:" tnsname.oraÖÐÅäÖõķþÎñÃû(Èç¹ûÊÇϵͳĬÈÏÊý¾Ý¿â¿ÉÒÔ²»ÊäÈë)
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