SQL°´ÈÕÆÚÌõ¼þɾ³ýÊý¾Ý
delete from
uservalid
where(lastlogin<'2007-1-1
0:0:00')
Çå³ýÔÚuservalid±íÖÐ×îºóµÇ½ʱ¼äÔÚ2007Äê1ÔÂ1ÈÕÁãʱÁã·Ö֮ǰµÄÊý¾Ý
²éѯijһ·¶Î§ÄÚµÄÊý¾ÝÔòselete * from uservalid
where(wealth in(500,1000))
ÔÚ²éѯ·ÖÎöÆ÷ÀïÃæselete from where
inÕâЩ¹Ø¼ü×Ö¶¼×Ô¶¯´óдÁË
Ïà¹ØÎĵµ£º
/*
¹¦ÄÜ£ºÀûÓú¯Êý´´½¨Á÷Ë®ºÅÈ磺
fx201005260001,
fx201005260002,
fx201005270001
×÷Õߣº³ÂÓÀ½¨
´´½¨Ê±¼ä£º2010-05-26
*/
use master
go
i ......
1¡¢×éºÏÓï¾äÖ´ÐÐ
BEGIN ATOMIC
±í´ïʽ1 ·ÖºÅ ¿Õ¸ñ/»Ø³µ
±í´ïʽ2 ·ÖºÅ ¿Õ¸ñ/»Ø³µ
END
2¡¢Ó¦¸ÃÏÞÖÆ·ÃÎÊȨÏÞµÄ±í£¨Ó¦¸Ã³·ÏúÕâЩ±íPUBLIC SELECT·ÃÎÊȨ£©
SYSCAT.DBAUTH
SYSCAT.TABAUTH
SYSCAT.PACKAGEAUTH
SYSCAT.INDEXAUTH
SYSCAT.COLAUTH
SYSCAT.PASSTHRUAUTH
SYSCAT.SCHEMAAUTH
±È½ÏÓÐÓõÄĿ¼± ......
¸Õ¸Õ×°ÁËSQL2008£¬ÅäÖÃÁËһϣ¬ÔÚÍøÉÏÕÒµ½Õâ¸ö½Ì³Ì£¬¾õµÃ²»´í£¬×ªÔØÑ§Ï°
1¡¢ ¸ü¸ÄTCP/IPÁ¬½ÓΪÆôÓÃ
2¡¢ µÇ¼ £¬ ÐÞ¸Ä2¸öµØ·½
a) Éí·ÝÑéÖ¤·½Ê½£¨»ìºÏģʽ£©
ͼһ£ºÊ×ÏÈʹÓÃwindowsÉí·ÝµÇ¼£¨×¢Ò⣬ ·þÎñÆ÷Ãû³Æ±ØÐëÌîдÕýÈ·£©
  ......
SQL²Ù×÷È«¼¯
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÷£ ......
±¾ÖܺÍÉÏÖܾÀí¸øÎÒÃÇ×öÁËÁ½´Î¹ØÓÚsqlµÄÅàѵ£¬¸Ð¾õºÜÓÐÓÃËùÒÔ×ܽáһϣ¡
Union£ºÖ»ÓÐÁ½Õűí½á¹¹ÏàͬµÄ½á¹û¼¯²ÅÄÜʹÓÃunion£¬½«ËùÓеıíÊý¾Ý·Åµ½Ò»¸ö½á¹û¼¯ÖС£
Count£º¼ÆËã²ÎÊýÁбíÖеÄÊý×ÖÏîµÄ¸öÊý¡£À¨ºÅÀï±ß¿ÉÒÔÊÇÁÐÃû£¬Ò²¿ÉÒÔÊDzÎÊýÖµ¡£
  ......