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

ÈÃUNIONÓëORDER BY²¢´æÓÚSQLÓï¾äµ±ÖÐ

http://www.cnblogs.com/yinzhenzhixin/archive/2009/01/07/1371064.html
ÔÚSQLÓï¾äÖУ¬UNION¹Ø¼ü×Ö¶àÓÃÀ´½«²¢ÁеĶà×é²éѯ½á¹û(±í)ºÏ²¢³ÉÒ»¸ö½á¹û(±í)£¬¼òµ¥ÊµÀýÈçÏ£º
SELECT [Id],[Name],[Comment] from [Product1]
UNION
SELECT [Id],[Name],[Comment] from [Product2]
ÉÏÃæµÄ´úÂë¿ÉÒÔʵÏÖ½«´ÓProduct1ºÍProduct2Á½ÕűíºÏ²¢³ÉÒ»¸ö±í£¬Èç¹ûÄúÖ»ÊÇÏ£ÍûºÏ²¢Á½ÕűíÖзûºÏÌØ¶¨Ìõ¼þµÄ¼Ç¼ÒÖ»òÊǺϲ¢Á½Õűí¸÷×ÔµÄǰNÌõ¼Ç¼£¬ÄÇôÄúµÄ´úÂë¿ÉÄÜ»áÏñÏÂÃæÕâÑùд£º
SELECT [Id],[Name],[Comment] from [Product1] WHERE LEN([Name]) > 5
UNION
SELECT [Id],[Name],[Comment] from [Product2] WHERE [Id] IN (11,20) AND [Comment] IS NOT NULL
SELECT TOP N [Id],[Name],[Comment] from [Product1]
UNION
SELECT TOP N [Id],[Name],[Comment] from [Product2]
This is so easy£¡µ«ÊǼÙÈçÄúÏ£Íû´Ó°üº¬Type×ֶεÄij±íÖиù¾ÝType·Ö±ðËæ»úɸѡNÌõ¼Ç¼²¢½«½á¹ûºÏ²¢³ÉÒ»ÕÅ±í£¬Äú¿ÉÄÜ»áÏñÏÂÃæÕâÑùд£º
SELECT TOP N [Id],[Name],[Comment] from [Product] WHERE [Type]='TYPE1' ORDER BY NEWID()
UNION
SELECT TOP N [Id],[Name],[Comment] from [Product] WHERE [Type]='TYPE2' ORDER BY NEWID()
UNION
SELECT TOP N [Id],[Name],[Comment] from [Product] WHERE [Type]='TYPE3' ORDER BY NEWID()
UNION
SELECT TOP N [Id],[Name],[Comment] from [Product] WHERE [Type]='TYPE4' ORDER BY NEWID()
UNION
SELECT TOP N [Id],[Name],[Comment] from [Product] WHERE [Type]='TYPE5' ORDER BY NEWID()
UNION
SELECT TOP N [Id],[Name],[Comment] from [Product] WHERE [Type]='TYPE6' ORDER BY NEWID()
UNION
SELECT TOP N [Id],[Name],[Comment] from [Product] WHERE [Type]='TYPE7' ORDER BY NEW


Ïà¹ØÎĵµ£º

SQL Server 2005ÖÐÐÂÔöµÄ¹¦ÄÜÇ¿´óµÄ´°¿Úº¯Êý

Ô­ÎĵØÖ·£ºhttp://www.cnblogs.com/changhai0605/articles/1276319.html
OracleµÄÇë²Î¿¼£ºhttp://zonghl8006.blog.163.com/blog/static/4528311520083995931317/
1.¼ò½é£º
SQL Server 2005ÖÐÐÂÔöµÄ´°¿Úº¯Êý°ïÖúÄãѸËٲ鿴²»Í¬¼¶±ðµÄ¾ÛºÏ£¬Í¨¹ýËü¿ÉÒԷdz£·½±ãµØÀÛ¼Æ×ÜÊý¡¢Òƶ¯Æ½¾ùÖµ¡¢ÒÔ¼°Ö´ÐÐÆäËü¼ÆËã¡£
´°¿Úº¯Êý¹¦ÄÜ·Ç ......

¹ØÓÚ³ÌÐò´úÂëÖеÄSQLÓï¾ä

ÔÚ³ÌÐòÖÐÓÐЩ²éѯÓï¾äÏà¶Ô½Ï³¤£¬¿ÉÒÔ½«Óï¾äµ¥¶ÀдÔÚÒ»¸öXXX.sqlÎļþÖУ¬ÔÚ³ÌÐòÖжÁÈ¡SQLÎļþ
¾ßÌåÉæ¼°µ½
import java.io.File;
import org.apache.commons.io.FileUtils;
import java.net.URL;
URL resourceUrl = XXXX.class.getClassLoader().getResource(SQL_PATH+sqlName);//SQL_PATH¾ßÌåSQLÎļþ´æÔÚ·¾¶£¬sqlName¼ ......

±ðÈöÔSql Server µÄÐÔÄܲâÊÔÊý¾ÝÃÔ»óÄã

Êý¾Ý¿âµÄÐÔÄܲâÊÔ¿ÉÒÔ°ïÖúÄãÌáǰ֪µÀÄãµÄϵͳµÄ¸ºÔØÄÜÁ¦£¬¿ÉÒÔ°ïÖúÄã¸Ä½øÏµÍ³µÄʵʩ»òÉè¼Æ£¬¿ÉÒÔ°ïÖúÄãÈ·¶¨Ò»Ð©Éè¼ÆºÍ±à³ÌÔ­Ôò. µ«ÊÇ£¬ÕâÀïÃæÒ²ÓÐÏÝÚå. Èç¹û²»Ð¡ÐÄ£¬Äã»á×Ô¼º°Ñ×Ô¼ºÏݽøÈ¥£¬È´×îÖÕ²»Ã÷°×ÊÇʲôԭÒò. ÕâÀÎÒÄÃһλÏÈÉúΪÀý£¬À´¿´¿´ËûÔõô×Ô¼º°Ñ×Ô¼º¸ãºýÍ¿µÄ.
×î½ü, ÏëÆðÔÚ´æ´¢¹ý³ÌÖо¿¾¹ÊÇʹÓÃÁÙʱ±í»¹ÊÇÊ ......

SQLÈ«¾Ö±äÁ¿


SQL Server ϵͳȫ¾Ö±äÁ¿
@@CONNECTIONS
·µ»Ø×ÔÉÏ´ÎÆô¶¯ÒÔÀ´Á¬½Ó»òÊÔͼÁ¬½ÓµÄ´ÎÊý¡£
@@CURSOR_ROWS
·µ»ØÁ¬½ÓÉÏ×îºó´ò¿ªµÄÓαêÖе±Ç°´æÔڵĺϸñÐеÄÊýÁ¿(·µ»Ø±»´ò¿ªµÄÓαêÖл¹Î´±»¶ÁÈ¡µÄÓÐЧÊý¾ÝÐеÄÐÐÊý)
@@DATEFIRST
·µ»ØÃ¿ÖܵÚÒ»ÌìµÄÊý×Ö
@@ERROR
·µ»Ø×îºóÖ´ÐеÄSQL Óï¾äµÄ´íÎó´úÂë¡£
@@FETCH_STATUS
·µ ......

SQL Server 2005: Recursive Hierarchies to XML

Suppose we have a recursive hierarchy stored in a relational database and we want to write it to XML.  This might be for a variety of reasons – e.g. as a pre-cached input to a UI control, to export to another system using a pre-defined format, etc.
 
In SQL Server 2000, in order to ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ