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Standard   Security:  
   
  "Data   Source=Aron1;Initial  
Catalog=pubs;User   Id=sa;Password=asdasd;"    
        -   or   -  
 
"Server=Aron1;Database=pubs;User  
ID=sa;Password=asdasd;Trusted_Connection=False"    
        (both  
connection   strings   produces   the   same   result)  
   
   
   
   
    Trusted   Connection:  
   
  "Data  
Source=Aron1;Initial   Catalog=pubs;Integrated   Security=SSPI;"    
       
-   or   -  
  "Server=Aron1;Database=pubs;Trusted_Connection=True;"    
        (both   connection   strings   produces   the   same   result)  
   
  (use   serverName\instanceName   as   Data   Source   to   use  
an   specifik   SQLServer   instance)  
    Connect   via   an   IP  
address:  
  "Data   Source=190.190.200.100,1433;Network  
Library=DBMSSOCN;Initial   Catalog=pubs;User   ID=sa;Password=asdasd;"    
 
(DBMSSOCN=TCP/IP   instead   of   Named   Pipes,   at   the   end   of   the  
Data   Source   is   the   port   to   use   (1433   is   the   default))  
    Enabling   MARS   (multiple   active   result   sets):  
   
 
"Server=Aron1;Database=pubs;Trusted_Connection=True;MultipleActiveResultSets=true"
   
  Note!   Use &nbs


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oracle³£Óþ­µäSQL²éѯ£¨×ªÔØ£©

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1¡¢²é¿´±í¿Õ¼äµÄÃû³Æ¼°´óС
select t.tablespace_name, round(sum(bytes/(1024*1024)),0) ts_size
from dba_tablespaces t, dba_data_files d
where t.tablespace_name = d.tablespace_name
group by t.tablespace_name;
2¡¢²é¿´±í¿Õ¼äÎïÀíÎļþµÄÃû³Æ¼°´óС
select tablespace_name, file_id, ......

SQLÖÐcase whenµÄÁ½ÖÖʹÓ÷½·¨Ê¾Àý

Case¾ßÓÐÁ½ÖÖ¸ñʽ¡£¼òµ¥Caseº¯ÊýºÍCaseËÑË÷º¯Êý¡£
--¼òµ¥Caseº¯Êý
CASE sex
         WHEN '1' THEN 'ÄÐ'
         WHEN '2' THEN 'Å®'
ELSE 'ÆäËû' END
--CaseËÑË÷º¯Êý
CASE WHEN sex = '1' THEN 'ÄÐ'
  &nbs ......

SQL SERVER¿ç·þÎñÆ÷²éѯ(SQL SERVER DBLINK)

--¿ç·þÎñÆ÷²éѯÈçÏ£º
SELECT a.*,b.stor_Name
from OPENROWSET('MSDASQL',
   'DRIVER={SQL Server};SERVER=tom;UID=sa;PWD=123',
   pubs.dbo.authors) AS a,stores b
ORDER BY a.au_lname, a.au_fname
--ÆäÖУ¬tomΪԶ³Ì·þÎñÆ÷Ãû£¬stores ÊDZ¾»úÊý¾Ý¿âpubsÖеıí
--ÐèҪעÒâµÄÊÇÈô¶þ¸ö±íÖÐµÄ ......

sql serverÇå³ýÈÕÖ¾

1: ɾ³ýLOG (ɾ³ýlogÎļþ£¬¸½¼Óʱ×Ô¶¯Öؽ¨logÎļþ£¬ÒÔ´Ë·½Ê½À´Çå¿ÕÈÕÖ¾)
    1) ·ÖÀëÊý¾Ý¿â  ÆóÒµ¹ÜÀíÆ÷£­£¾·þÎñÆ÷£­£¾Êý¾Ý¿â£­£¾ÓÒ¼ü£­£¾·ÖÀëÊý¾Ý¿â
    2) ɾ³ýLOGÎļþ
    3) ¸½¼ÓÊý¾Ý¿â  ÆóÒµ¹ÜÀíÆ÷£­£¾·þÎñÆ÷£­£¾Êý¾Ý¿â£­£¾ÓÒ¼ü£­£¾¸½¼ÓÊý¾Ý¿â
´Ë·¨Éú³ ......

sql ¼ÓÃÜ

use Tempdb
go
if object_ID ( 'fn_ACITEncryption' ) is not null
drop function fn_ACITEncryption
go
create function fn_ACITEncryption
(
@Str nvarchar ( 4000), -- ¼ÓÃܵÄ×Ö·û´®
@Flag bit = 1, --1 ¡¢¼ÓÃÜ 0 ¡¢½âÃÜ
@Key nvarchar ( 50) -- ÃÜÎÄ
)
returns nvarchar ( 4000) ......
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