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mssql Öн«ºº×Öת»»ÎªÆ´ÒôÊ××Öĸ·½·¨


1.
--½«ºº×Öת»»ÎªÆ´ÒôÊ××Öĸ
CREATE   function   GetAllPY(@str   nvarchar(4000))
returns   nvarchar(4000)
--WITH   ENCRYPTION
as
begin
declare   @intLen int
declare   @strRet nvarchar(4000)
declare   @temp   nvarchar(100)
set   @intLen   =   len(@str)
set   @strRet   =   ''
while   @intLen   >   0
begin
set   @temp   =   ''
select   @temp   =   case   
when   substring(@str,@intLen,1)   >=   '帀'   then   'Z'
when   substring(@str,@intLen,1)   >=   'Ѿ'   then   'Y'
when   substring(@str,@intLen,1)   >=   'Ϧ'   then   'X'
when   substring(@str,@intLen,1)   >=   '屲'   then   'W'
when   substring(@str,@intLen,1)   >=   'Ëû'   then   'T'
when   substring(@str,@intLen,1)   >=   'Øí'   then   'S'
when   substring(@str,@intLen,1)   >=   '呥'   then   'R'
when   substring(@str,@intLen,1)   >=   'Æß'   then   'Q'
when   substring(@str,@intLen,1)   >=   '妑'   then   'P'
when   substring(@str,@intLen,1)   >=   'àÞ'   then   'O'
when   substring(@str,@intLen,1)   >=   '拏'   then   'N'
when   substring(@str,@intLen,1)   >=   '嘸'   then   'M'
when   substring(@str,@intLen,1)   >=   'À¬'   then   'L'
when   substring(@str,@intLen,1)   >=   'ßÇ'   then   'K'
when   substring(@str,@intLen,1)   >=   'Ø¢'   then     'J'
when   substring(@str,@intLen,1)   >=   'îþ'   then   'H'
when   substring(@str,@intLen,1)   >=   'ê


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MSSQL´æ´¢¹ý³ÌʵÀý

Create proc RegisterUser
(
@usrName varchar(30)
,@usrPasswd varchar(30)
,@age int
,@PhoneNum varchar(20)
,@Address varchar(50)
)
as
begin
--ÏÔʾ¶¨Òå²¢¿ªÊ¼Ò»¸öÊÂÎñ
begin tran
insert into user
(
userName
,userPasswd
)
values
(
@usrName
,@usrPassw ......

mssql sysobjects type˵Ã÷

xtype ´ú±íÀàÐÍ 
C = CHECK Ô¼Êø 
D = ĬÈÏÖµ»ò DEFAULT Ô¼Êø 
F = FOREIGN KEY Ô¼Êø 
L = ÈÕÖ¾ 
FN = ±êÁ¿º¯Êý 
IF = ÄÚǶ±íº¯Êý 
P = ´æ´¢¹ý³Ì 
PK = PRIMARY KEY Ô¼Êø£¨ÀàÐÍÊÇ K£© 
RF = ¸´ÖÆÉ¸Ñ¡´æ´¢¹ý³Ì 
S = ϵͳ±í 
TF = ±íº¯Êý 
TR = ´¥· ......

»ùÓÚmssql °ÙÍò¼¶ Êý¾Ý ²éѯ ÓÅ»¯ ¼¼ÇÉÈýÊ®Ôò

1.¶Ô²éѯ½øÐÐÓÅ»¯£¬Ó¦¾¡Á¿±ÜÃâÈ«±íɨÃ裬Ê×ÏÈÓ¦¿¼ÂÇÔÚ where ¼° order by Éæ¼°µÄÁÐÉϽ¨Á¢Ë÷Òý¡£
2.Ó¦¾¡Á¿±ÜÃâÔÚ where ×Ó¾äÖжÔ×ֶνøÐÐ null ÖµÅжϣ¬·ñÔò½«µ¼ÖÂÒýÇæ·ÅÆúʹÓÃË÷Òý¶ø½øÐÐÈ«±íɨÃ裬È磺
select id from t where num is null
¿ÉÒÔÔÚnumÉÏÉèÖÃĬÈÏÖµ0£¬È·±£±íÖÐnumÁÐûÓÐnullÖµ£¬È»ºóÕâÑù²éѯ£º
select id ......

MsSQL,MySQL,Oracle,Êý¾Ý¿âÁ¬½Ó×Ö¶Î

Ms sql 2000
drivername=com.microsoft.jdbc.sqlserver.SQLServerDriver
url=jdbc:microsoft:sqlserver://localhost:1433;DatabaseName=books
username=sa
password=sa
MySQL
drivername=com.mysql.jdbc.Driver
url=jdbc:mysql://localhost/books
username=root
password=root
Oracle
drivername=orac ......

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selectÓï¾äǰ¼Ó£º
declare @d datetime
set @d=getdate()
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select [Óï¾äÖ´Ðл¨·Ñʱ¼ä(ºÁÃë)]=datediff(ms,@d,getdate())
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MSSQL ServerÖÐͨ¹ý²é ......
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