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Éú³ÉsqlµÄ·½·¨ÊÇ Database -->Generate Database (Ctrl + G ) µ«ÊÇÌáʾ
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½â¾ö·½·¨: ½«check model È¥µô¾Í¿ÉÒÔÁË.ÆäÖУ¬one file onÊÇ·ñÐèÒª°´ÕÕ±íÉú³ÉÐí¶à¸ösql£¨Ä¬ÈÏÑ¡ÉÏ£¬¼´²»ÐèÒª£©
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¶þ¡¢Power designer, ·´Ïò¹¤³ÌÉú³ÉERͼ
1. In PowerDesigner, choose File | Reverse Engineer | Database.... The New Physical Data Model Dialog box, shown
next, appears.DBMSҪѡ³ÉOracle 10G, È»ºóµã"OK"
2.ÔÚ³öÀ´µÄdatabase reverse engineering´°¿ÚÀï, µãÉÏ"Using script files", ÔÙµãÄǸö"н¨"µÄͼ±ê, »á³öÀ´¸öÑ¡ÔñÎļþµÄ¶Ô»°¿ò,Ñ¡Ôñscript fileµÄλÖÃ.then press "OK".
3. Éú³ÉER diagram
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SQl Êý¾Ý¿âÏà¹Ø²Ù×÷

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Sql server 2005ÈÕÖ¾ÎļþÌ«´ó,ʹÆä¼õСµÄ·½·¨
ÔËÐÐÏÂÃæµÄÈýÐÐ PMDataCenter  ΪÊý¾Ý¿âÃû:
backup log PMDataCenter with NO_LOG
backup log PMDataCenter with TRUNCATE_ONLY
DBCC SHRINKDATABASE(PMDataCenter) ......

SQL Union ÓëUnion AllÏê½â

1.Union
UNION Ö¸ÁîµÄÄ¿µÄÊǽ«Á½¸ö SQL Óï¾äµÄ½á¹ûºÏ²¢ÆðÀ´¡£´ÓÕâ¸ö½Ç¶ÈÀ´¿´£¬ UNION ¸ú JOIN ÓÐЩÐíÀàËÆ£¬ÒòΪÕâÁ½¸öÖ¸Áî¶¼¿ÉÒÔÓɶà¸ö±í¸ñÖÐߢȡ×ÊÁÏ¡£ UNION µÄÒ»¸öÏÞÖÆÊÇÁ½¸ö SQL Óï¾äËù²úÉúµÄÀ¸Î»ÐèÒªÊÇͬÑùµÄ×ÊÁÏÖÖÀà¡£ÁíÍ⣬µ±ÎÒÃÇÓà UNIONÕâ¸öÖ¸Áîʱ£¬ÎÒÃÇÖ»»á¿´µ½²»Í¬µÄ×ÊÁÏÖµ (ÀàËÆ SELECT DISTINCT)¡£
UNION µ ......

Sql½á´æÓà

select ÐÕÃû,סַ,ÆÚ³õÓà¶î=isnull(ÆÚ³õÔö¼Ó,0)-isnull(ÆÚ³õ¼õÉÙ,0),±¾ÆÚÔö¼Ó,±¾ÆÚ¼õÉÙ,
±¾ÆÚ½áÓà=(isnull(ÆÚ³õÔö¼Ó,0)-isnull(ÆÚ³õ¼õÉÙ,0)+isnull(±¾ÆÚÔö¼Ó,0)-isnull(±¾ÆÚ¼õÉÙ,0)) from (
select ÐÕÃû,סַ,
ÆÚ³õÔö¼Ó=(select ÆÚ³õÔö¼Ó=sum(Ôö¼Ó»ý·Ö) from b where ·¢ÉúÈÕÆÚ<'2006-5-1' and ¿¨ºÅ=a.¿¨ºÅ),
ÆÚ³õ¼õÉ ......

SQlÓαê

declare @CausName as char(20) declare @causenameid as int declare
@Description as varchar(200) declare @Caus_Id as int
declare @sign as char(20)
create table #tb ( Caus_Id int,CausName varchar(20),causNameid int,Caus_Description varchar(200),±êÖ¾ varchar(20))
 
DECLARE myCursor1 CURSOR F ......
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