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sp_configure 'allow updates','1'
go
reconfigure with override
go
update sysobjects set uid=1 where uid<>1
go
sp_configure 'allow updates','0'
go
reconfigure with override


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Sqlite»ù´¡¼°ÆäÓëSQLServerÓï·¨²îÒì

sqlite¹Ù·½Õ¾
http://www.sqlite.org/
SQL Syntax
http://www.sqlite.org/lang.html
sqliteÖÐÎÄÕ¾
http://www.sqlite.com.cn/
http://www.sqlitechina.org/
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$ sqlite3 foo.db
Èç¹ûĿ¼ÏÂûÓÐfo ......

SQLServer 2005 ÖеÄÀàÐÍ Óë C# ÖеÄÀàÐÍ ¶ÔÓ¦ ¹ØÏµ

<Language from="SQL" To="C#">
   <Type from="bigint" To="long" />
   <Type from="binary" To="object" />
   <Type from="bit" To="bool" />
   <Type from="char" To="string" />
   <Type from="datetime" To="DateTime" ......

SQLServerË÷Òýµ÷ÓÅʵ¼ù

Ë÷ÒýµÄÖØÒªÐÔ
¡¡¡¡Êý¾Ý¿âÐÔÄÜÓÅ»¯ÖÐË÷Òý¾ø¶ÔÊÇÒ»¸öÖØÁ¿¼¶µÄÒòËØ£¬¿ÉÒÔ˵£¬Ë÷ÒýʹÓò»µ±£¬ÆäËüÓÅ»¯´ëÊ©½«ºÁÎÞÒâÒå¡£
¡¡¡¡¾Û´ØË÷Òý(Clustered Index)ºÍ·Ç¾Û´ØË÷Òý (Non- Clustered Index)¡¡
¡¡¡¡×îͨË׵ĽâÊÍÊÇ:¾Û´ØË÷ÒýµÄ˳Ðò¾ÍÊÇÊý¾ÝµÄÎïÀí´æ´¢Ë³Ðò£¬¶ø¶Ô·Ç¾Û´ØË÷ÒýµÄË÷Òý˳ÐòÓëÊý¾ÝÎïÀíÅÅÁÐ˳ÐòÎ޹ء£¾ÙÀýÀ´Ëµ£¬Äã·­µ½Ð ......

sqlserver ×Ô¶¨Ò庯ÊýËæ»ú²úÉúÖ¸¶¨·¶Î§µÄËæ»úÊý

/*
--´´½¨ÊÓͼ
create view RandomView as select re=rand()
--×Ô¶¨Ò庯Êý:È¡µÃÖ¸¶¨·¶Î§µÄËæ»úÊý
create function RandData(
@a int,
@b int)
returns decimal(38,0)
as
begin
declare @r decimal(38,0)
select @r=cast(re*(@b-@a)+@a as decimal(38,0)) from RandomView
return(@r)
end
go
s ......

SQLServer ±í²éѯÖÐµÄ ºÏ²¢²éѯ ºÏ¼¯ ²î¼¯ ½»¼¯

use tempdb
go
if (object_id ('t1' ) is not null ) drop table t1
if (object_id ('t2' ) is not null ) drop table t2
go
create table t1 (a int )
insert into t1 select 1 union select 2 union select 3
create table t2 (a int )
insert into t2 select 3 union select 4 union select 5
go
sele ......
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