c#Æô¶¯Sql Server·þÎñ
³ÌÐòÆô¶¯Sql ServerÆäʵºÜ¼òµ¥
´úÂ룺
System.ServiceProcess.ServiceController myController =
new System.ServiceProcess.ServiceController("MSSQL$ACCP4444"); //·þÎñÃû³Æ ÕÒÁ˰ëÌì²ÅÕÒµ½£¬±¿ËÀÎÒÍêÁË¡£ÔÚ·þÎñÉÏÓÒ¼üÊôÐÔ£¬ÄÜ¿´µ½
if (myController.CanStop)
{ }
else
{
myController.Start();
}
//×¢ ÐèÒªÒýÓà System.ServiceProcess ÔÚÏîÄ¿->Ìí¼ÓÒýÓÃ->ÄÜÕÒµ½Õâ¸öÒýÓá£
Ïà¹ØÎĵµ£º
5.1 ÃÜÂë²ßÂÔ
¡¡¡¡ÓÉÓÚsql server²»Äܸü¸ÄsaÓû§Ãû³Æ£¬Ò²²»ÄÜɾ³ýÕâ¸ö³¬¼¶Óû§£¬ËùÒÔ£¬ÎÒÃDZØÐë¶ÔÕâ¸öÕʺŽøÐÐ×îÇ¿µÄ±£»¤£¬µ±È»£¬°üÀ¨Ê¹ÓÃÒ»¸ö·Ç³£Ç¿×³µÄÃÜÂ룬×îºÃ²»ÒªÔÚÊý¾Ý¿âÓ¦ÓÃÖÐʹÓÃsaÕʺš£Ð½¨Á¢Ò»¸öÓµÓÐÓësaÒ»ÑùȨÏ޵ij¬¼¶Óû§À´¹ÜÀíÊý¾Ý¿â¡£Í¬Ê±Ñø³É¶¨ÆÚÐÞ¸ÄÃÜÂëµÄºÃϰ¹ß¡£Êý¾Ý¿â¹ÜÀíÔ±Ó¦¸Ã¶¨ÆÚ²é¿´ÊÇ·ñÓв»·ûºÏ ......
sqlÖ®left join¡¢right join¡¢inner joinµÄÇø±ð
×òÌìÃæÊÔ8Ò³±ÊÊÔÌâÄ¿,»ù±¾É϶¼ÊÇSQl µÄ,ÌØ±ðÊÇÕ⼸¸öÇø±ð,¼ÇµÃ²»ÊǺÜÇåÎú,Ö»¼ÇµÃleftÊÇÒÔ×ó±íΪÖ÷±í,
rightÒÔÓÒ±íΪÖ÷±í,µ¼ÖÂ×ö´íÁ˼¸¸ö!½ñÌìËÑÁËÏÂ!×ÜËãŪÇå³þÁË!ÒÔÏÂÊÇתÌû!
left join(×óÁª½Ó) ·µ»Ø°üÀ¨×ó±íÖеÄËùÓмǼºÍÓÒ±íÖÐÁª½á×Ö¶ÎÏàµÈµÄ¼Ç¼
right j ......
--ÁгöSQL ServerʵÀýÖеÄÊý¾Ý¿â
sp_databases
--·µ»ØSQL Server¡¢Êý¾Ý¿âÍø¹Ø»ò»ù´¡Êý¾ÝÔ´µÄÌØÐÔÃûºÍÆ¥ÅäÖµµÄÁбí
sp_server_info
--·µ»Øµ±Ç°»·¾³ÖеĴ洢¹ý³ÌÁбí
sp_stored_procedures
--·µ»Øµ±Ç°»·¾³Ï¿ɲéѯµÄ¶ÔÏóµÄÁÐ±í£¨ÈκοɳöÏÖÔÚ from ×Ó¾äÖеĶÔÏó£©
sp_tables
select * from sysobjects
---Ìí¼Ó»ò¸ü¸Ä ......
1.¼¤»îSQL¸ú×Ù
´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¡ ......
Student(S#,Sname,Sage,Ssex) ѧÉú±í
Course(C#,Cname,T#) ¿Î³Ì±í
SC(S#,C#,score) ³É¼¨±í
Teacher(T#,Tname) ½Ìʦ±í
ÎÊÌ⣺
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 ......