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EXEC sp_configure 'show advanced options', 1
RECONFIGURE
EXEC sp_configure 'xp_cmdshell', 1
RECONFIGURE
/** µ¼³öÎı¾Îļþ 
EXEC master..xp_cmdshell 'bcp dbname..tablename out c:\DT.txt -c -S servername -U sa -P password' 
»ò 
EXEC master..xp_cmdshell 'bcp "Select * from dbname..tablename" queryout c:\DT.txt -c -S servername -U sa -P password' 
µ¼³öµ½TXTÎı¾£¬ÓöººÅ·Ö¿ª 
exec master..xp_cmdshell 'bcp "¿âÃû..±íÃû" out "d:\tt.txt" -c -t ,-U sa -P password' 
BULK INSERT ¿âÃû..±íÃû 
from 'c:\test.txt' 
WITH ( 
FIELDTERMINATOR = ';', 
ROWTERMINATOR = '\n' 
)


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1.oracle
 sql   = "SELECT column_name, data_type, data_length, nullable";
 sql += " from user_tab_columns ";
 sql += " where table_name='";
 sql += $tableName;
 sql += "'";
 select * from user_tab_comments & ......

oracle10g SQL ¸ú×Ù

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   ´Óoracle10gÒÔºóÌṩÁËÐµķ½·¨¼¤»îSQLµÄ¸ú×Ù£¬¼´ÊÇʹÓÃdbms_monitor°üÀ´¿ªÆô»ò¹Ø±ÕSQL¸ú×Ù¡£
   ֮ǰ¾É·½·¨ÊÇʹÓà alter session set events ..  »òÕßʹÓÃdbms_system.set_ev·½Ê½
   ʹÓÃdbms_monitor°ü¿ÉÒÔÔڻỰ£¬¿Í»§¶Ë£¬×é¼þÒÔ¼°Êý¾Ý¿âËĸö²ã¼¶¿ªÆôSQLµÄ¸ú×Ù¡ ......

Ò»¸öÌâÄ¿Éæ¼°µ½µÄ50¸öSqlÓï¾ä

Student(S#,Sname,Sage,Ssex) ѧÉú±í
Course(C#,Cname,T#) ¿Î³Ì±í
SC(S#,C#,score) ³É¼¨±í
Teacher(T#,Tname) ½Ìʦ±í
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1¡¢²éѯ“001”¿Î³Ì±È“002”¿Î³Ì³É¼¨¸ßµÄËùÓÐѧÉúµÄѧºÅ£»
  select a.S# from (select s#,score from SC where C#='001') a,(select s#,score
  fr ......

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1. /*+ALL_ROWS*/
   ±íÃ÷¶ÔÓï¾ä¿éÑ¡Ôñ»ùÓÚ¿ªÏúµÄÓÅ»¯·½·¨,²¢»ñµÃ×î¼ÑÍÌÍÂÁ¿,ʹ×ÊÔ´ÏûºÄ×îС»¯.
   ÀýÈç:
   SELECT /*+ALL+_ROWS*/ EMP_NO,EMP_NAM,DAT_IN from BSEMPMS WHERE EMP_NO='CCBZZP';
2. /*+FIRST_ROWS*/
   ±íÃ÷¶ÔÓï¾ä¿éÑ¡Ôñ»ùÓÚ¿ªÏúµÄÓÅ»¯·½·¨,²¢»ñµÃ×î¼ÑÏìӦʱ ......

c#Æô¶¯Sql Server·þÎñ

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System.ServiceProcess.ServiceController   myController   =
new   System.ServiceProcess.ServiceController("MSSQL$ACCP4444"); //·þÎñÃû³Æ ÕÒÁ˰ëÌì²ÅÕÒµ½£¬±¿ËÀÎÒÍêÁË¡£ÔÚ·þÎñÉÏÓÒ¼üÊôÐÔ£¬ÄÜ¿´µ½
if (myController.CanStop)
{ }
else ......
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