Ò׽ؽØÍ¼Èí¼þ¡¢µ¥Îļþ¡¢Ãâ°²×°¡¢´¿ÂÌÉ«¡¢½ö160KB

¡¾Oracle¡¿SQLÓÅ»¯µÄÖØÒª¹¤¾ß AUTOTRACE

¡¾AUTOTRACE¡¿SQLÓÅ»¯µÄÖØÒª¹¤¾ß--AUTOTRACE
Ìáµ½SQLÓÅ»¯£¬²»Äܲ»ÌáAUTOTRACEµÄÇ¿´ó¹¦ÄÜ¡£Ê¹ÓÃÆðÀ´·Ç³£±ã½Ý£¬²»¹ýÔÚÊÇʹÓÃ֮ǰ£¬ÐèÒª×öһЩÅäÖõŤ×÷¡£¼òÒªµÄÃèÊöÒ»ÏÂÕâ¸ö¹ý³Ì£¬¹©Ã»ÓÐʹÓùýµÄÅóÓѲο¼¡£
1.ʹÓÃsysÓû§Ö´ÐÐplustrce½Å±¾
sys@ora10g> @?/sqlplus/admin/plustrce
sys@ora10g> drop role plustrace;
drop role plustrace
          *
ERROR at line 1:
ORA-01919: role 'PLUSTRACE' does not exist
sys@ora10g> create role plustrace;
Role created.
sys@ora10g> grant select on v_$sesstat to plustrace;
Grant succeeded.
sys@ora10g> grant select on v_$statname to plustrace;
Grant succeeded.
sys@ora10g> grant select on v_$mystat to plustrace;
Grant succeeded.
sys@ora10g> grant plustrace to dba with admin option;
Grant succeeded.
sys@ora10g> set echo off
2.½«plustraceÊÚȨ¸øpublicÓû§£¬ÒԱ㱣֤ËùÓÐÓû§¶¼ÓÐȨʹÓÃautotrace¹¦ÄÜ
sys@ora10g> grant plustrace to public;
Grant succeeded.
3.Á¬½Óµ½¾ßÌåµÄÓû§ÖУ¬ÕâÀïÊÇsecÓû§
sys@ora10g> conn sec/sec
Connected.
4.ʹÓÓset autotrace”²é¿´autotraceµÄÃüÁîÌáʾ
sec@ora10g> set autotrace
Usage: SET AUTOT[RACE] {OFF | ON | TRACE[ONLY]} [EXP[LAIN]] [STAT[ISTICS]]
5.ÕâÀïÑÝʾһÖÖÉèÖ÷½·¨
sec@ora10g> set autotrace traceonly
sec@ora10g> select * from cat;
20 rows selected.
Execution Plan
----------------------------------------------------------
Plan hash value: 3442307057
--------------------------------------------------------------------------------
| Id  | Operation             | Name   | Rows  | Bytes | Cost (%CPU)| Time     |
--------------------------------------------------------------------------------
|   0 | SELECT STATEMENT      |        |   646 | 47804 |    33   (4)| 00:00:01 |
|*  1 |  FILTER  &nbs


Ïà¹ØÎĵµ£º

Oracle 10g ÒªµãÕûÀí Ö® ÉÁ»Ø£¨½öÏÞÓÚSQL*Plus£©

ÉÁ»Ø
1 ÌØÕ÷
ÉÁ»ØÊý¾Ý¿âÖ»ÊÇÂß¼­Êý¾ÝÔâµ½ÆÆ»µÊ±µÄÊֶΡ£
ÉÁ»ØÊý¾Ý¿âÈÕÖ¾±ØÐëÔÚÊý¾Ý¿â»Ö¸´ÇøÖд´½¨¡£
ÉÁ»ØÈÕÖ¾²»ÐèÒª¹éµµ£¬²»ÄÜÓÃÓÚÎïÀí»Ö¸´¡£
Ö´ÐÐÉÁ»ØÊý¾Ý¿â²Ù×÷ʱ£¬±³¾°½ø³ÌRVWR¾ÍÆô¶¯ÁË¡£
 
2 ʹÓÃÉÁ»ØÊý¾Ý¿â
3ÖÖ¹¤¾ß£¬SQL*Plus£¬RMAN£¬OEM¡£
£¨1£©ÒªÇó
ΪÁËʹÓÃÉÁ»ØÊý¾Ý¿â£¬Êý¾Ý¿â±ØÐë´¦Óڹ鵵ÈÕ־ģʽ¡ ......

C#´ò°üSQLÊý¾Ý¿â²¿Êð°²×°


²Î¿¼¡¶ASP.NETÓëSQLÒ»Æð´ò°ü²¿Êð°²×°¡·
£¬ÕâÆªÎÄÕÂÊÇÕë¶ÔVB.NETÓëSQL Ò»Æð´ò°üµÄ,µ«ÊÇÎÒʹÓõÄÊÇC#,µ±È»Ö»ÒªÐÞ¸ÄÒ»ÏÂÖ÷Òª°²×°Àà¿â¾ÍÐÐÁË!C#µÄÀà¿â´úÂëÈçÏÂ:DBCustomAction.cs
using System;
using System.Collections;
using System.Data.SqlClient;
using System.ComponentModel;
using System.Configuration.Inst ......

³£Óþ­µäSQLÓï¾ä´óÈ«

 ÏÂÁÐÓï¾ä²¿·ÖÊÇMssqlÓï¾ä£¬²»¿ÉÒÔÔÚaccessÖÐʹÓá£
¡¡¡¡SQL·ÖÀࣺ
¡¡¡¡DDL—Êý¾Ý¶¨ÒåÓïÑÔ(CREATE£¬ALTER£¬DROP£¬DECLARE)
¡¡¡¡DML—Êý¾Ý²Ù×ÝÓïÑÔ(SELECT£¬DELETE£¬UPDATE£¬INSERT)
¡¡¡¡DCL—Êý¾Ý¿ØÖÆÓïÑÔ(GRANT£¬REVOKE£¬COMMIT£¬ROLLBACK)
¡¡¡¡Ê×ÏÈ,¼òÒª½éÉÜ»ù´¡Óï¾ä£º
¡¡¡¡1¡¢ËµÃ÷£º ......

SQL·ÖÒ³·½·¨

±íÖÐÖ÷¼ü±ØÐëΪ±êʶÁУ¬[ID] int IDENTITY (1,1)
Ò²¿ÉÒÔʹÓÃÁªºÏÖ÷¼ü id+id2+id3+……
 
1.·ÖÒ³·½°¸Ò»£º(ÀûÓÃNot InºÍSELECT TOP·ÖÒ³)
Óï¾äÐÎʽ£º  
SELECT TOP 10 *
from TestTable
WHERE (ID NOT IN
          (SELECT TOP 20 id
&nb ......

²Ù×÷ÈÕÆÚµÄSQLÓï¾ä´óÈ«

1.ÏÔʾ±¾ÔµÚÒ»Ìì
SELECT DATEADD(mm,DATEDIFF(mm,0,getdate()),0)
select convert(datetime,convert(varchar(8),getdate(),
120)+’01’,120)
2.ÏÔʾ±¾ÔÂ×îºóÒ»Ìì
select dateadd(day,-1,convert(datetime,convert
(varchar(8),dateadd(month,1,getdate()),120)+’01’,120))
SELECT ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ