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

linq to sqlÉú³Énot inÓï¾äµÄС¼¼ÇÉ

ÒÔǰһֱ¾õµÃlinq to sqlÉú³ÉÀàËÆwhere id not in (1,3,5)»òwhere id not in (select id from ...)ÕâÑùµÄÌõ¼þ²»ÊǺܷ½±ã£¬Ã¿´ÎÎÒ¶¼ÊǰÑÌõ¼þIDÊÂÏÈÈ¡µ½Ò»¸öÊý×éÀȻºóÓà !Arr.Contains(c.Id)ÕâÑù´¦Àí£¬½ñÌìͻȻ·¢ÏÖÕâÑùºÃɵ£¬Æäʵ¿ÉÒÔÍêȫֱ½ÓÓÃlinqд³ÉÒ»¾ä£¬Ìù¸öʾÀýÔÚÕâÀÒԺ󱸲é
from a in TableA where !(from b in TableB Where ... select b.Id).Contains(a.Id)
×îÖÕ·­Òë³öÀ´µÄÓï¾ä²¢·Ç¸únot in ÍêȫһÑùµÄ£¬¶øÊÇÓÃnot exists(...)£¬²»¹ýЧ¹ûÍêÈ«Ïàͬ£¬ÄÜ´ïµ½ÒªÇó¾ÍÐÐÁË£¡


Ïà¹ØÎĵµ£º

ORACLE PL/SQL ¶ÔÏó(object)ѧϰ±Ê¼Ç(Ò»)

 1¡¢¶ÔÏóÀàÐ͹淶
 
´´½¨¶ÔÏóÀàÐ͹淶µÄÓï·¨ÈçÏÂ
 
CREATE [OR REPLACE] TYPE [schema.] type_name
[AUTHID {CURRENT_USER|DEFINER}] AS OBJECT (
Attribute1 datatype,
[attribute2 datatype,…]
[method 1]
[method 2]);
/

 
 
 
ÆäÖÐAUTHIDָʾ½«À´Ö´Ðи÷½·¨Ê±£¬ ......

ORACLE PL/SQL ¶ÔÏó(object)ѧϰ±Ê¼Ç(¶þ)

4¡¢¶ÔÏóÒÀÀµÐÔ
 
CREATE OR REPLACE TYPE Obj1 AS OBJECT (
f1 NUMBER,
f2 VARCHAR2(10),
f3 DATE
);
/

CREATE OR REPLACE TYPE Obj2 AS OBJECT (
f1 DATE,
f2 CHAR(1)
);
/

CREATE OR REPLACE TYPE Obj3 AS OBJECT (
a Obj1,
b Obj2
);
/
  
 
OBJ3ÒÀÀµÓÚOBJ ......

[SQL Server]ÑÓ³ÙÖ´ÐÐ


WAITFOR
Ö¸¶¨´¥·¢Óï¾ä¿é¡¢´æ´¢¹ý³Ì»òÊÂÎñÖ´ÐеÄʱ¼ä¡¢Ê±¼ä¼ä¸ô»òʼþ¡£
Óï·¨
WAITFOR { DELAY 'time' | TIME
'time' }
²ÎÊý
DELAY
ָʾ Microsoft® SQL Server™ Ò»Ö±µÈµ½Ö¸¶¨µÄʱ¼ä¹ýÈ¥£¬×¿É´ï 24 Сʱ¡£
'time'
ÒªµÈ´ýµÄʱ¼ä¡£¿ÉÒÔ°´ datetime Êý¾Ý¿É½ÓÊܵĸñʽָ¶¨
time£¬Ò²¿ÉÒÔÓþֲ¿±äÁ¿Ö¸¶ ......

¡¾×ª¡¿MySQLÖÐSQLÓÅ»¯ºÍ¼Ü¹¹Éè¼ÆµÄһЩ¼òµ¥Ïë·¨

ÆÕͨMySQLÔËÐУ¬Êý¾ÝÁ¿ºÍ·ÃÎÊÁ¿²»´óµÄ»°£¬ÊÇ×ã¹»¿ìµÄ£¬µ«Êǵ±Êý¾ÝÁ¿ºÍ·ÃÎÊÁ¿¾çÔöµÄʱºò£¬ÄÇô¾Í»áÃ÷ÏÔ·¢ÏÖMySQLºÜÂý£¬ÉõÖÁdownµô£¬ÄÇô¾ÍÒª¿¼ÂÇÓÅ»¯ÎÒÃǵÄMySQLÁË¡£
ÓÅ»¯ÎÞ·ÇÊÇ´ÓÈý¸ö½Ç¶ÈÈëÊÖ£º
µÚÒ»¸öÊÇ´ÓÓ²¼þ£¬Ôö¼ÓÓ²¼þ£¬Ôö¼Ó·þÎñÆ÷
µÚ¶þ¸ö¾ÍÊǶÔÎÒÃǵÄMySQL·þÎñÆ÷½øÐÐÓÅ»¯£¬Ôö¼Ó»º´æ´óС£¬¿ª¶à¶Ë¿Ú£¬¶Áд·Ö¿ª
µÚÈý¸ö ......

SQL Server

Êý¾ÝÀàÐÍ
ÔÚ Microsoft SQL ServerÖУ¬Ã¿¸öÁС¢¾Ö²¿±äÁ¿¡¢±í´ïʽºÍ²ÎÊý¶¼ÓÐÒ»¸öÏà¹ØµÄÊý¾ÝÀàÐÍ£¬ÕâÊÇÖ¸¶¨¶ÔÏó¿É³ÖÓеÄÊý¾ÝÀàÐÍ£¨ÕûÐÍ¡¢×Ö·û¡¢money µÈµÈ£©µÄÌØÐÔ¡£SQL Server ÌṩϵͳÊý¾ÝÀàÐͼ¯£¬¶¨ÒåÁË¿ÉÓë SQL Server Ò»ÆðʹÓõÄËùÓÐÊý¾ÝÀàÐÍ¡£ÏÂÃæÁгöϵͳÌṩµÄÊý¾ÝÀàÐͼ¯¡£
¿ÉÒÔ¶¨ÒåÓû§¶¨ÒåµÄÊý¾ÝÀàÐÍ£¬ÆäÊÇϵͳÌá ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ