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Oracle Òì³£

OracleÒì³£·ÖΪ3ÖÖ:
(1)Ô¤¶¨ÒåÒì³£:no_data_foundµÈ,ÊÇOracleϵͳ¶¨ÒåµÄÒì³£.
declare
  s_test varchar2
begin
  select id into s_test from test; --´Ëʱtest±íÎÞÊý¾Ý
exception
  when no_data_found then
    raise_application_error(-20001, 'ûÓÐÊý¾Ý');
end;
(2)×Ô¶ ......

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select   a.tablespace_name,a.bytes/1024/1024
"Sum MB",(a.bytes-b.bytes)/1024/1024   "used MB",b.bytes/1024/1024
"free MB",round(((a.bytes-b.bytes)/a.bytes)*100,2) "percent_used"
from
(select tablespace_nam ......

[Oracle 10g] ÉÁ»Ø»Ö¸´Çø (Flash Recovery Area)

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Oracle 10g ÓÐÒ»Ïîй¦ÄܳÆÎª:×Ô¶¯µÄ»ùÓÚ´ÅÅ̵ı¸·ÝÓë»Ö¸´( Automatic Disk-Based Backup and Recovery )¡£ÊµÏָù¦ÄܵĻù´¡Îª±¾ÎÄÒª½²ÊöµÄÉÁ»Ø»Ö¸´Çø( Flash Recovery Area )¡£ÉÁ»Ø»Ö¸´ÇøÊÇ Oracle 10g ÖеÄÐÂÊÂÎï¡£¼òµ¥µÄ˵£¬ÉÁ»Ø»Ö¸´ÇøÊÇÒ»¿éÓÃÒÔ´æ´¢»Ö¸´Ïà¹ØµÄÎļþµÄ´æ´¢¿Õ¼ä¡£ÔÊÐíÓû§¼¯Öд洢ËùÓлָ ......

oracle ʱ¼äÀàÐÍ C#

ÔÚsqlÓï¾äÖÐÉæ¼°µ½Ê±¼äÀàÐÍʱ ÈôÖ»ÏëÒªÈÕÆÚ  to_date('2007-7-8','yyyy-mm-dd')
  ÔÚC#ÖÐÓÐdatetimeÀàÐÍ£¬´úÂë˵Ã÷Ò»ÇÐ
  DateTime dt = System.DateTime.Now;
string lsh;
lsh=string.Format("{0:yyyyMMddHHmmss}", dt);
DateTime dt = DateTime.Now;
Label1.Text = dt.To ......
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