(ÍøÕª)SQL·ÖÒ³Óï¾ä
֮ǰżȻ¹äÍøÒ³µÄʱºò¿´µ½µÄ,ÏêϸµÄÍøÖ·Íü¼Çcopy¹ýÀ´ÁË£¬ÕæÊDZ§Ç¸¡£¾õµÃ¼òµ¥Ò×¶®,ËùÒÔתÁË,ÎûÎû
ÓйطÖÒ³ SQL µÄ×ÊÁϺܶ࣬ÓеÄʹÓô洢¹ý³Ì£¬ÓеÄʹÓÃÓαꡣ±¾È˲»Ï²»¶Ê¹ÓÃÓα꣬ÎÒ¾õµÃËüºÄ×Ê¡¢Ð§Âʵͣ»Ê¹Óô洢¹ý³ÌÊǸö²»´íµÄÑ¡Ôñ£¬ÒòΪ´æ´¢¹ý³ÌÊǾ¹ýÔ¤±àÒëµÄ£¬Ö´ÐÐЧÂʸߣ¬Ò²¸üÁé»î¡£ÏÈ¿´¿´µ¥Ìõ SQL Óï¾äµÄ·ÖÒ³ SQL °É¡£
·½·¨1£º
ÊÊÓÃÓÚ SQL Server 2000/2005
SELECT TOP Ò³´óС *
from table1
WHERE id NOT IN
(
SELECT TOP Ò³´óС*(Ò³Êý-1) id from table1 ORDER BY id
)
ORDER BY id
·½·¨2£º
ÊÊÓÃÓÚ SQL Server 2000/2005
SELECT TOP Ò³´óС *
from table1
WHERE id >
(
SELECT ISNULL(MAX(id),0)
from
(
SELECT TOP Ò³´óС*(Ò³Êý-1) id from table1 ORDER BY id
) A
)
ORDER BY id
·½·¨3£º
ÊÊÓÃÓÚ SQL Server 2005
SELECT TOP Ò³´óС *
from
(
SELECT ROW_NUMBER() OVER (ORDER BY id) AS RowNumber,* from table1
) A
WHERE RowNumber > Ò³´óС*(Ò³Êý-1)
˵Ã÷£¬Ò³´óС£ºÃ¿Ò³µÄÐÐÊý£»Ò³Êý£ºµÚ¼¸Ò³¡£Ê¹ÓÃʱ£¬Çë°Ñ&ldq
Ïà¹ØÎĵµ£º
SQL×¢Èë¹¥»÷µÄΣº¦ÐԺܴó¡£ÔÚ½²½âÆä·ÀÖ¹°ì·¨Ö®Ç°£¬Êý¾Ý¿â¹ÜÀíÔ±ÓбØÒªÏÈÁ˽âÒ»ÏÂÆä¹¥»÷µÄÔÀí¡£ÕâÓÐÀûÓÚ¹ÜÀíÔ±²ÉÈ¡ÓÐÕë¶ÔÐԵķÀÖδëÊ©¡£
¡¡ Ò»¡¢ SQL×¢Èë¹¥»÷µÄ¼òµ¥Ê¾Àý¡£
¡¡¡¡statement := "SELECT * from Users WHERE Value= " + a_variable + "
ÉÏÃæÕâÌõÓï¾äÊÇºÜÆ ......
×î½üºÜ棬ÓиöÏîÄ¿ÂíÉÏÒªÕб꣬һ¸öÏîÄ¿µÈ׏¤£¬Èô¸ÉËöËéµÄʽøÐÐÖУ¬ÓÐÒ»¶Îʱ¼äû¸üÐÂЩÓÐÓªÑøµÄ¶«Î÷ÁË
˵¸öÌâÍâ»°ÏÈ¡£
½ñÌ쿪»ú×¼±¸°Ñ×òÌìµÄ¶«Î÷debugһϣ¬ºÜϰ¹ßµØÓÒ¼üÏîÄ¿µÄÆô¶¯Îļþ¿ªÊ¼debug£¬»úÆ÷ͻȻÀ¶ÆÁÖØÆô¡£¿ªÊ¼ÒÔΪÓÖÊÇÄÚ´æÔÚ͵͵³¬Æµ£¬¼ì²éÁËÒ»ÏÂbios£¬·¢ÏÖûʲôÎÊÌ⣬ҲûÔõôÔÚÒ⣬ËíÖØÐ¿ªÆôvs2008¼ÌÐø ......
Ò»¡¢»ù´¡
1¡¢ËµÃ÷£º´´½¨Êý¾Ý¿â
CREATE DATABASE database-name
2¡¢ËµÃ÷£ºÉ¾³ýÊý¾Ý¿â
drop database dbname
3¡¢ËµÃ÷£º±¸·Ýsql server
--- ´´½¨ ±¸·ÝÊý¾ÝµÄ device
USE master
EXEC sp_addumpdevice 'disk', 'testBack', 'c:\mssql7backup\MyNwind_1.dat'
--- ¿ªÊ¼ ±¸·Ý
BACKUP DATABASE pubs TO testBack
4¡¢Ëµ ......
c# SQLÊý¾Ý¿âÔ¶³ÌÁ¬½Ó¼°ÅäÖ÷½·¨
Ò»£ºC# Á¬½ÓSQLÊý¾Ý¿â
Data Source=myServerAddress;Initial Catalog=myDataBase;User Id=myUsername;Password=myPassword;
Data Source=190.190.200.100,1433;Network Library=DBMSSOCN;Initial Catalog=myDataBase;User ID=myUsername;Password=myPassword;
Server=myServerAddress;D ......
½éÉÜ
ͨ³££¬Ñз¢ÈËԱʹÓõÄÊÇT-SQLÀ´´´½¨SQL ServerµÄ´æ´¢¹ý³Ì¡¢º¯ÊýºÍ´¥·¢Æ÷¡£ ¶øÏÖÔÚµÄSQL Server 2005ÒÑÍêȫ֧³Ö.NETͨÓÃÓïÑÔÔËÐÐʱ£¨CLR£©ÁË¡£ Õâ¾ÍÒâζ×Å£¬ÄúÄܹ»Ê¹ÓÃ.NETµÄÓïÑÔ£¬ÈçC#¡¢VB.NETÖ®ÀàµÄÀ´Ñз¢SQL ServerµÄ´æ´¢¹ý³Ì¡¢º¯ÊýºÍ´¥·¢Æ÷¡£ SQL Server ºÍ CLR µÄ¼¯³É¸øÎÒÃÇ´øÀ´ÁËn¶àºÃ´¦£¬Èçʵʱ±àÒë¡¢ÀàÐͰ²È«¡ ......