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

SQL²éѯÿÐÐÖÐ×î´óÖµµÄ¼¼ÇÉ

--------------------------------------------------------------------------
--  Author : htl258(Tony)
--  Date   : 2010-04-23 08:08:36
--  Version:Microsoft SQL Server 2008 (RTM) - 10.0.1600.22 (Intel X86)
--          Jul  9 2008 14:43:34
--          Copyright (c) 1988-2008 Microsoft Corporation
--          Developer Edition on Windows NT 5.1 <X86> (Build 2600: Service Pack 3)
--  Blog   : http://blog.csdn.net/htl258
--  Subject: SQL²éѯÿÐÐÖÐ×î´óÖµµÄ¼¼ÇÉ
--------------------------------------------------------------------------
--> Éú³É²âÊÔÊý¾Ý±í:tb
 
IF NOT OBJECT_ID('[tb]') IS NULL
    DROP TABLE [tb]
GO
CREATE TABLE [tb](
a SMALLINT,
b SMALLINT,
c SMALLINT,
d SMALLINT,
e SMALLINT,
f SMALLINT,
g SMALLINT
)
INSERT [tb]
SELECT 1,2,3,4,5,2,3 UNION ALL
SELECT 4,5,6,7,7,2,0 UNION ALL
SELECT 4,9,6,7,7,9,6
GO
--SELECT * from [tb]
 
-->SQL²éѯÈçÏÂ:
 
SELECT *,
    (SELECT MAX(a)
     from(
       SELECT a UNION ALL
       SELECT b UNION ALL
       SELECT c UNION ALL
       SELECT d UNION ALL
       SELECT e UNION ALL
       SELECT f UNION ALL
       SELECT g
       ) AS t  
    ) AS maxvalue
from tb
 
 
/*
a      b      c      d      e      f      g      maxvalue
------ ------ ------ ------ ------ ------ ------ --------


Ïà¹ØÎĵµ£º

SQLÈÕÆÚ¸ñʽ´óÈ«

CONVERT
½«Ä³ÖÖÊý¾ÝÀàÐ͵ıí´ïʽÏÔʽת»»ÎªÁíÒ»ÖÖÊý¾ÝÀàÐÍ¡£ÓÉÓÚijЩÐèÇó¾­³£Óõ½È¡ÈÕÆÚ¸ñʽµÄ²»Í¬.ÏÖÒÔÏ¿ÉÔÚ
SQL ServerÖÐ ½«ÈÕÆÚ¸ñʽ»¯.
SQL Server Ö§³ÖʹÓÿÆÍþÌØËã·¨µÄ°¢À­²®ÑùʽÖеÄÊý¾Ý¸ñʽ¡£
ÔÚ±íÖУ¬×ó²àµÄÁ½Áбíʾ½« datetime »ò smalldatetime ת»»Îª×Ö·ûÊý¾ÝµÄ style Öµ¡£¸ø style Öµ¼Ó 100£¬¿É»ñµÃ°ü ......

Shrink SQL Server 2008 Database + Log File Script

Use DatabaseName
--DB shrink
--»ñÈ¡database ¿ÕÓà¿Õ¼ä£¬¡¡¾ö¶¨ÊÇ·ñ×÷shrinkDB
exec [DBNAME].dbo.sp_spaceused
DBCC ShrinkDB(DBNAME)
--Log file shrink
Use DatabaseName
GO
Alter Database DatabaseName Set Recovery Simple
GO
Alter Database DatabaseName Set Recovery Full
GO
DBCC SHRINKFILE ('Log ......

ÓÃsql²Ù×÷oracleµÄblob×Ö¶Î

ÓÃsql²Ù×÷oracleµÄblob×Ö¶Î
1¡¢²éѯ
select utl_raw.cast_to_varchar2(dlob),id from system.t_htinfo 
2¡¢²åÈë
insert into system.t_htinfo  values ('3',utl_raw.cast_to_raw('Äã'));
3¡¢¸üÐÂ
update system.t_htinfo set fld_value=utl_raw.cast_to_raw('1') where fh_nm=1820648 and form_index=52
......

sql ·þÎñÆ÷½ÇÉ« Êý¾Ý¿â½ÇÉ«



sql ·þÎñÆ÷½ÇÉ« Êý¾Ý¿â½ÇÉ«
·þÎñÆ÷½ÇÉ«
ËùÓеķþÎñÆ÷½ÇÉ«¶¼ÊÇ“¹Ì¶¨µÄ”½ÇÉ«£¬²¢ÇÒ£¬´ÓÒ»¿ªÊ¼¾Í´æÔÚÓÚÄÇÀï——×Ô°²×°ÍêSQL ServerµÄÄÇÒ»¿ÌÆð£¬Ä㽫ӵÓеÄËùÓзþÎñÆ÷½ÇÉ«¾ÍÒѾ­´æÔÚÁË¡£

½Ç¡¡¡¡É«
ÌØ¡¡¡¡ÐÔ

sysadmin
¸Ã½ÇÉ«Äܹ»Ö´ÐÐSQL ServerÉϵÄÈκβÙ× ......

³£ÓÃSQLÃæÊÔÌâ £¨¶þ£©

Student(S#,Sname,Sage,Ssex) ѧÉú±í
Course(C#,Cname,T#) ¿Î³Ì±í
SC(S#,C#,score) ³É¼¨±í
Teacher(T#,Tname) ½Ìʦ±í
ÎÊÌ⣺
1¡¢²éѯ“001”¿Î³Ì±È“002”¿Î³Ì³É¼¨¸ßµÄËùÓÐѧÉúµÄѧºÅ£»
  select a.S# from (select s#,score from SC where C#='001') a,(select s#,score
  fr ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ