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

SQLλÔËËã

SQLλÔËËã
select 2|8       --10
select 2|8|1    --11
select 10&8    --8,°üº¬,10=8+2
select 10&2    --2,°üº¬,10=2+8
select 10&4    --0,²»°üº¬
select 19&16  --16,°üº¬,19=16+2+1
select 19&8    --0,°üº¬,19=16+2+1
select * from SqlBitOperation where FBitTags&4=4
 
ÔÚȨÏÞÖеÄÓ¦ÓÃ
1¡¢Á½Õűí
£¨1£©¡¢²Ù×÷ÓëȨÏÞ±êÖ¾±í
if exists (select * from sysobjects where id = OBJECT_ID('[RightTags]') and OBJECTPROPERTY(id, 'IsUserTable') = 1)
DROP TABLE [RightTags]
CREATE TABLE [RightTags] (
[Pkid] [int]  IDENTITY (1, 1)  NOT NULL,
[RightsName] [nvarchar]  (50) NOT NULL,
[RightsTag] [int]  NOT NULL DEFAULT (0))
ALTER TABLE [RightTags] WITH NOCHECK ADD  CONSTRAINT [PK_RightTags] PRIMARY KEY  NONCLUSTERED ( [Pkid] )
SET IDENTITY_INSERT [RightTags] ON
INSERT [RightTags] ([Pkid],[RightsName],[RightsTag]) VALUES ( 1,'³Ô·¹',1)
INSERT [RightTags] ([Pkid],[RightsName],[RightsTag]) VALUES ( 2,'À­Êº',2)
INSERT [RightTags] ([Pkid],[RightsName],[RightsTag]) VALUES ( 3,'´òÅÚ',4)
INSERT [RightTags] ([Pkid],[RightsName],[RightsTag]) VALUES ( 4,'ÅÝæ¤',8)
INSERT [RightTags] ([Pkid],[RightsName],[RightsTag]) VALUES ( 5,'Éú×Ó',16)
INSERT [RightTags] ([Pkid],[RightsName],[RightsTag]) VALUES ( 6,'°ü¶þÄÌ',32)
SET IDENTITY_INSERT [RightTags] OFF

£¨2£©¡¢Óû§ÓëȨÏÞ±í
if exists (select * from sysobjects where id = OBJECT_ID('[RightUsers]') and OBJECTPROPERTY(id, 'IsUserTable') = 1)
DROP TABLE [RightUsers]
CREATE TABLE [RightUsers] (
[Pkid] [int]  IDENTITY (1, 1)  NOT NULL,
[FUser] [nvarchar]  (50) NOT NULL,
[UserRights] [int]  NOT NULL DEFAULT (0))
ALTER TABLE [RightUsers] WITH NOCHECK ADD  CONSTRAINT [PK_RightUsers] PRIMARY KEY  NONCLUSTERED ( [Pkid] )
SET IDENTITY_INSERT [RightUsers] ON
INSERT [RightUsers] ([Pkid],[FUser],[UserRights]) VALUES ( 1


Ïà¹ØÎĵµ£º

LINQ to SQLµÄ²»×ã

LINQ to sqlËäÈ»½«Êý¾Ý¿â²Ù×÷ºÍÒµÎñÂß¼­¸ôÀ뿪À´£¬Ê¹¿ª·¢ÈËÔ±Äܹ»Ê¹Óõ¥Ò»µÄÓïÑÔºÍ֪ʶÄܹ»·½±ãµÄ²Ù×÷Êý¾Ý¿â²¢´¦ÀíÒµÎñÂß¼­¡£µ«ÊÇÕâ±Ï¾¹ÊÇ΢ÈíO/R½â¾ö·½°¸µÄµÚÒ»¸ö°æ±¾£¬Ïà±ÈÏà¶Ô³ÉÊìµÄDataSetÊý¾Ý¼¯½â¾ö·½°¸À´Ëµ£¬ÎÒÃÇ»¹ÊÇ¿ÉÒÔ¿´µ½Ò»Ð©²»×ã¡£
¡¡¡¡Ê×ÏÈ£¬ÎÒÃÇ×¢Òâµ½ËùÓеÄÊý¾ÝʵÌ岢ûÓдÓÒ»¸ö»ùÀàÖÐÅÉÉú£¬ÕâʹµÃ¸ø¿ª·¢Í¨Ó ......

¶¯Ì¬SQL(Dynamic SQL)

----start
    ¶¯Ì¬SQLÊÇÔÚ³ÌÐòÔËÐÐʱ¹¹ÔìµÄ£¬ÒªÖ´Ðе¥ÌõSQL£¬Ê¹ÓÃEXECUTE IMMEDATE Óï¾ä£»µ±ÅúÁ¿Ö´ÐÐSQLʱ£¬ÏÈʹÓÃPREPARE Óï¾ä¹¹ÔìSQL£¬È»ºóʹÓÃEXECUTE Óï¾äÖ´ÐС£
Ò»£ºPrepareÓï¾ä£ºÓÃÀ´¹¹ÔìÅúÁ¿SQL
Óï·¨£º
PREPARE <sql-statement> [OUTPUT] INTO <result> [INPUT INTO] <input> ......

SQL SERVER 2000/2005 ÁÐתÐÐ ÐÐתÁÐ


ÆÕͨÐÐÁÐת»»
ÎÊÌ⣺¼ÙÉèÓÐÕÅѧÉú³É¼¨±í(tb)ÈçÏÂ:
ÐÕÃû ¿Î³Ì ·ÖÊý
ÕÅÈý ÓïÎÄ 74
ÕÅÈý Êýѧ 83
ÕÅÈý ÎïÀí 93
ÀîËÄ ÓïÎÄ 74
ÀîËÄ Êýѧ 84
ÀîËÄ ÎïÀí 94
Ïë±ä³É(µÃµ½ÈçϽá¹û)£º
ÐÕÃû ÓïÎÄ Êýѧ ÎïÀí
---- ---- ---- ----
ÀîËÄ 74 84 94
ÕÅÈý 74 83 93
-------------------
*/
create table tb(Ð ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ