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SQL Server 2000 de shi tu zhong bi xu xiao xin shi yong * fu hao

2008-08-15 05:14:57 编辑來源:互联网 评论
 
本文为【SQL Server 2000的视图中必须小心使用*符号】的拼音翻译版
  you xie peng you kan dao zhe ge biao ti ke neng hui you yi wen , nan dao zai shi tu zhong shi yong * fu hao huan you he yao zhu yi de di fang ma ? dui yu zhe ge wen ti , wo men xian bu bi hui da , xian kan yi xia li zi ba 。
  wo zhe li , shi yong de shu ju ku shi SqlServer2000 zi dai de Northwind, zhe yang fang bian da jia zi ji si xia li ce shi 。 shou xian , chuang jian liang ge shi tu , shi tu de jiao ben ru xia :
  -- shi tu vCustomersA
  create view vCustomersA
  as
  select CustomerID ,CompanyName,ContactName,ContactTitle,
  Address,City,Region,PostalCode,Country,Phone,Fax
  from dbo.Customers
  go
  -- shi tu vCustomersB
  create view vCustomersB
  as
  select * from vCustomersA
  go
  ran hou , shi yong zhe liang ge shi tu cha xun ke hu ID wei ALFKI de zi liao , cha xun yu ju ru xia :
  select * from vCustomersA where CustomerID = 'ALFKI'
  select * from vCustomersB where CustomerID = 'ALFKI'
  cha xun de jie guo ru xia :
  yi qie zheng chang , zhe ge shi hou , xu qiu fa sheng le bian hua , wo men xu yao gai dong vCustomersA, gai dong hou de jiao ben ru xia :( wei le shuo ming wen ti , wo men zhi shi ba CompanyName he ContactName hu huan yi xia wei zhi )
  -- gai dong hou de shi tu vCustomersA
  alter view vCustomersA
  as
  select CustomerID ,ContactName,CompanyName,ContactTitle,
  Address,City,Region,PostalCode,Country,Phone,Fax
  from dbo.Customers
  go
  zhe ge shi hou , dang wo men zai ci shi yong shi tu vCustomersB cha xun ke hu ID wei ALFKI de zi liao de shi hou , cuo wu yi jing qiao ran lai lin , ni zhu yi dao le ma ? rang wo men lai kan yi xia zhe liang ge shi tu de cha xun jie guo ba , cha xun yu ju ru xia :
  select * from vCustomersA where CustomerID = 'ALFKI'
  select * from vCustomersB where CustomerID = 'ALFKI'
  cha xun de jie guo fa sheng bian hua 。 ni zhu yi dao shu ju de yi chang le ma ? shi yong shi tu vCustomersB cha xun de jie guo chu xian le cuo wu ,CompanyName xian shi de zi liao shi :Maria Anders, er zai shi tu vCustomersA cha xun de jie guo zhong CompanyName shi :Alfreds Futterkiste。 wo men jin jin shi zai vCustomersA zhong hu huan le liang ge zi duan de wei zhi , zai ci shi yong vCustomersB cha xun shu ju que fa sheng le shu ju cuo wei de xian xiang , zhe shi shen me yuan yin dao zhi de ne ?
  dai zhe zhe ge wen ti , rang wo men qu le jie yi xia , he wei shi tu ? zai Sql Server2000 de bang zhu wen dang zhong shi zhe yang miao shu shi tu de , ding yi ru xia :“ shi tu shi yi ge xu ni biao , qi nei rong you cha xun ding yi , tong zhen shi de biao yi yang , shi tu bao han yi xi lie dai you ming cheng de lie he xing shu ju 。 dan shi , shi tu bing bu zai shu ju ku zhong yi cun chu de shu ju zhi ji xing shi cun zai 。 xing he lie shu ju lai zi you ding yi shi tu de cha xun suo yin yong de biao , bing qie zai yin yong shi tu shi dong tai sheng cheng 。” tong guo zhe ge ding yi wo men ke yi kan chu , shi tu shi yi ge xu ni de biao , ta jin jin bao kuo shi tu de ding yi jiao ben , cha xun de nei rong ze shi dong tai de sheng cheng 。 dang wo men chuang jian le yi ge shi tu yi hou , shi tu de jiao ben hui bao cun dao dang qian shu ju ku de xi tong biao syscomments li , wo men ke yi tong guo xi tong ti gong de cun chu guo cheng :sp_helptext cha xun de dao shi tu de ding yi jiao ben 。 cong ding yi shang kan , hao xiang bing bu neng de dao wo men xiang yao de da an , na me wo men jiu xian bu guan Sql Server2000 shi ru he shi xian shi tu de , wo men xian lai jie jue yi xia dang qian de wen ti ( wo shang mian ti dao de )。 ke neng you xie peng you yi jing zhi dao le jie jue wen ti de ban fa le , na jiu shi ba vCustomersB de ding yi jiao ben chong xin zhi xing yi xia ( qi shi zhi xu yao ba create huan cheng alter zhi xing yi xia jiu ke yi ), jiao ben ru xia :
  -- chong xin zhi xing yi xia vCustomersB de ding yi jiao ben
  alter view vCustomersB
  as
  select * from vCustomersA
  go
  na me , chu le zhe ge fang fa yi wai , qi shi SqlServer2000 ye ti gong le yi ge kuo zhan cun chu guo cheng sp_refreshview lai bang wo men zuo zhe jian shi qing , tiao yong de jiao ben ru xia :
  -- shua xin zhi ding shi tu de yuan shu ju
  exec sp_refreshview 'vCustomersB'
  wo ge ren mu qian jiu zhi dao zhe liang ge ban fa , bu zhi dao , ni huan you mei you qi ta de ban fa , you de hua ke yi yi qi fen xiang yi xia 。
  sp_refreshview de gong neng miao shu wei :“ shua xin zhi ding shi tu de yuan shu ju 。 you yu shi tu suo yi lai de ji chu dui xiang de geng gai , shi tu de chi jiu yuan shu ju hui guo qi 。” you yu sp_refreshview de dai ma bei feng zhuang le ( mei you gong kai ), suo yi wo men kan bu dao ta de nei bu shi xian , bu guo kan le zhe ge cun chu guo cheng de miao shu , ni shi fou dui shi tu you le xin de ren shi ne ?
  cong zhe li , wo men ke yi kan dao , dang wo men shi yong yi ge shi tu cha xun shu ju de shi hou , qi shi wo men shi zai shi yong shi tu de yuan shu ju lai cha xun de , dang shi tu yi lai de dui xiang fa sheng le bian hua yi hou , shi tu de yuan shu ju jiu xu yao geng xin , zhe yang , shi yong shi tu shi cai bu hui wei bei wo men de yi yuan 。
  zhi dao le wen ti de chan sheng de yuan yin hou , na me wo men zai chong xin xiu gai yi ge biao huo shi tu de jiao ben shi , wo men jiu xu yao geng xin yi lai yu gai dui xiang de shi tu , fou ze jiu hui chu xian yi xiang bu dao de cuo wu 。 ru he zhao dao yi lai yu gai dui xiang de dui xiang ( bao kuo shi tu , chu fa qi , cun chu guo cheng ) ne ?SqlServer2000 zai gai shu ju ku de xi tong biao sysdepends li ji lu zhe xie yi lai guan xi , suo yi ni ke yi cha xun gai biao huo qu ni xiang yao de xin xi , dan qi shi , ni ke yi tong guo shi yong xi tong ti gong de cun chu guo cheng :sp_depends lai huo qu gai dui xiang de suo yi lai de dui xiang ( fan hui de di yi ge biao ) yi ji yi lai yu gai dui xiang de dui xiang ( fan hui de di er ge biao ), jiao ben ru xia :
  -- cha xun vCustomersA de yi lai de dui xiang yi ji yi lai yu vCustomersA de dui xiang
  exec sp_depends 'vCustomersA'
  cha xun de jie guo ru xia tu :
  zhu :sp_depends de dai ma shi gong kai de , you xing qu de ke yi kan yi xia qi shi xian guo cheng 。
  dao ci , ni ying gai ming bai , dang ni geng xin ni de biao huo shi tu de shi hou , ni huan yao shua xin yi lai yu zhe xie dui xiang de shi tu de yuan shu ju , ji xu yao tiao yong sp_refreshview lai shua xin yi lai yu gai dui xiang de shi tu 。 dan shi ni zai cha xun yi lai yu yi ge biao huo zhe shi tu de dui xiang ji he de shi hou xu yao zhu yi de yi dian shi , zai ni geng xin le yi ge biao huo shi tu zhi hou , na xie zhi qian chuang jian de yi lai yu gai biao huo shi tu de yi lai guan xi jiang hui diu shi ( ni geng xin de biao huo shi tu suo yi lai de dui xiang ji he bu hui diu shi ), yong wo zhi qian de li zi lai kan ,vCustomersB yi lai yu vCustomersA, na me dang wo men xiu gai le vCustomersA yi hou ,vCustomersB yu vCustomersA zhi jian de yi lai guan xi jiang hui diu shi er vCustomersA suo yi lai de Customers jiang bu hui diu shi ( yi lai guan xi zai dui xiang chuang jian huo geng xin shi chuang jian , geng xin shi , hui ba xian qian de yi lai guan xi shan diao )。( tiao yong sp_depends ni jiu ke yi kan chu lai zhe zhong wei miao de bian hua )
  xi wang zai ni yue du le ben wen yi hou , ni zai shi yong shi tu de shi hou hui geng jia de de xin ying shou , bi mian cuo wu fa sheng 。 wen zhong you bu dui de di fang huan ying zhi zheng pi ping !【原文】【汉音对照
 
 
 
 
 
 
 
 
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you xie peng you kan dao zhe ge biao ti ke neng hui you yi wen , nan dao zai shi tu zhong shi yong * fu hao huan you he yao zhu yi de di fang ma ? dui yu zhe ge wen ti , wo men xian bu bi hui da , xian kan yi xia li zi ba 。 wo zhe li , shi yong de shu ju ku shi SqlServer2000 zi dai de Northwind, zhe yang fang bian da jia zi ji si xia li ce shi 。 shou xian , chuang jian liang ge shi tu , shi tu de jiao ben ru xia : -- shi tu vCustomersA create view vCustomersA as select CustomerID ,CompanyName,ContactName,ContactTitle, Address,City,Region,PostalCode,Country,Phone,Fax from dbo.Customers go -- shi tu vCustomersB create view vCustomersB as select * from vCustomersA go ran hou , shi yong zhe liang ge shi tu cha xun ke hu ID wei ALFKI de zi liao , cha xun yu ju ru xia : select * from vCustomersA where CustomerID = 'ALFKI' select * from vCustomersB where CustomerID = 'ALFKI' cha xun de jie guo ru xia : yi qie zheng chang , zhe ge shi hou , xu qiu fa sheng le bian hua , wo men xu yao gai dong vCustomersA, gai dong hou de jiao ben ru xia :( wei le shuo ming wen ti , wo men zhi shi ba CompanyName he ContactName hu huan yi xia wei zhi ) -- gai dong hou de shi tu vCustomersA alter view vCustomersA as select CustomerID ,ContactName,CompanyName,ContactTitle, Address,City,Region,PostalCode,Country,Phone,Fax from dbo.Customers go zhe ge shi hou , dang wo men zai ci shi yong shi tu vCustomersB cha xun ke hu ID wei ALFKI de zi liao de shi hou , cuo wu yi jing qiao ran lai lin , ni zhu yi dao le ma ? rang wo men lai kan yi xia zhe liang ge shi tu de cha xun jie guo ba , cha xun yu ju ru xia : select * from vCustomersA where CustomerID = 'ALFKI' select * from vCustomersB where CustomerID = 'ALFKI' cha xun de jie guo fa sheng bian hua 。 ni zhu yi dao shu ju de yi chang le ma ? shi yong shi tu vCustomersB cha xun de jie guo chu xian le cuo wu ,CompanyName xian shi de zi liao shi :Maria Anders, er zai shi tu vCustomersA cha xun de jie guo zhong CompanyName shi :Alfreds Futterkiste。 wo men jin jin shi zai vCustomersA zhong hu huan le liang ge zi duan de wei zhi , zai ci shi yong vCustomersB cha xun shu ju que fa sheng le shu ju cuo wei de xian xiang , zhe shi shen me yuan yin dao zhi de ne ? dai zhe zhe ge wen ti , rang wo men qu le jie yi xia , he wei shi tu ? zai Sql Server2000 de bang zhu wen dang zhong shi zhe yang miao shu shi tu de , ding yi ru xia :“ shi tu shi yi ge xu ni biao , qi nei rong you cha xun ding yi , tong zhen shi de biao yi yang , shi tu bao han yi xi lie dai you ming cheng de lie he xing shu ju 。 dan shi , shi tu bing bu zai shu ju ku zhong yi cun chu de shu ju zhi ji xing shi cun zai 。 xing he lie shu ju lai zi you ding yi shi tu de cha xun suo yin yong de biao , bing qie zai yin yong shi tu shi dong tai sheng cheng 。” tong guo zhe ge ding yi wo men ke yi kan chu , shi tu shi yi ge xu ni de biao , ta jin jin bao kuo shi tu de ding yi jiao ben , cha xun de nei rong ze shi dong tai de sheng cheng 。 dang wo men chuang jian le yi ge shi tu yi hou , shi tu de jiao ben hui bao cun dao dang qian shu ju ku de xi tong biao syscomments li , wo men ke yi tong guo xi tong ti gong de cun chu guo cheng :sp_helptext cha xun de dao shi tu de ding yi jiao ben 。 cong ding yi shang kan , hao xiang bing bu neng de dao wo men xiang yao de da an , na me wo men jiu xian bu guan Sql Server2000 shi ru he shi xian shi tu de , wo men xian lai jie jue yi xia dang qian de wen ti ( wo shang mian ti dao de )。 ke neng you xie peng you yi jing zhi dao le jie jue wen ti de ban fa le , na jiu shi ba vCustomersB de ding yi jiao ben chong xin zhi xing yi xia ( qi shi zhi xu yao ba create huan cheng alter zhi xing yi xia jiu ke yi ), jiao ben ru xia : -- chong xin zhi xing yi xia vCustomersB de ding yi jiao ben alter view vCustomersB as select * from vCustomersA go na me , chu le zhe ge fang fa yi wai , qi shi SqlServer2000 ye ti gong le yi ge kuo zhan cun chu guo cheng sp_refreshview lai bang wo men zuo zhe jian shi qing , tiao yong de jiao ben ru xia : -- shua xin zhi ding shi tu de yuan shu ju exec sp_refreshview 'vCustomersB' wo ge ren mu qian jiu zhi dao zhe liang ge ban fa , bu zhi dao , ni huan you mei you qi ta de ban fa , you de hua ke yi yi qi fen xiang yi xia 。 sp_refreshview de gong neng miao shu wei :“ shua xin zhi ding shi tu de yuan shu ju 。 you yu shi tu suo yi lai de ji chu dui xiang de geng gai , shi tu de chi jiu yuan shu ju hui guo qi 。” you yu sp_refreshview de dai ma bei feng zhuang le ( mei you gong kai ), suo yi wo men kan bu dao ta de nei bu shi xian , bu guo kan le zhe ge cun chu guo cheng de miao shu , ni shi fou dui shi tu you le xin de ren shi ne ? cong zhe li , wo men ke yi kan dao , dang wo men shi yong yi ge shi tu cha xun shu ju de shi hou , qi shi wo men shi zai shi yong shi tu de yuan shu ju lai cha xun de , dang shi tu yi lai de dui xiang fa sheng le bian hua yi hou , shi tu de yuan shu ju jiu xu yao geng xin , zhe yang , shi yong shi tu shi cai bu hui wei bei wo men de yi yuan 。 zhi dao le wen ti de chan sheng de yuan yin hou , na me wo men zai chong xin xiu gai yi ge biao huo shi tu de jiao ben shi , wo men jiu xu yao geng xin yi lai yu gai dui xiang de shi tu , fou ze jiu hui chu xian yi xiang bu dao de cuo wu 。 ru he zhao dao yi lai yu gai dui xiang de dui xiang ( bao kuo shi tu , chu fa qi , cun chu guo cheng ) ne ?SqlServer2000 zai gai shu ju ku de xi tong biao sysdepends li ji lu zhe xie yi lai guan xi , suo yi ni ke yi cha xun gai biao huo qu ni xiang yao de xin xi , dan qi shi , ni ke yi tong guo shi yong xi tong ti gong de cun chu guo cheng :sp_depends lai huo qu gai dui xiang de suo yi lai de dui xiang ( fan hui de di yi ge biao ) yi ji yi lai yu gai dui xiang de dui xiang ( fan hui de di er ge biao ), jiao ben ru xia : -- cha xun vCustomersA de yi lai de dui xiang yi ji yi lai yu vCustomersA de dui xiang exec sp_depends 'vCustomersA' cha xun de jie guo ru xia tu : zhu :sp_depends de dai ma shi gong kai de , you xing qu de ke yi kan yi xia qi shi xian guo cheng 。 dao ci , ni ying gai ming bai , dang ni geng xin ni de biao huo shi tu de shi hou , ni huan yao shua xin yi lai yu zhe xie dui xiang de shi tu de yuan shu ju , ji xu yao tiao yong sp_refreshview lai shua xin yi lai yu gai dui xiang de shi tu 。 dan shi ni zai cha xun yi lai yu yi ge biao huo zhe shi tu de dui xiang ji he de shi hou xu yao zhu yi de yi dian shi , zai ni geng xin le yi ge biao huo shi tu zhi hou , na xie zhi qian chuang jian de yi lai yu gai biao huo shi tu de yi lai guan xi jiang hui diu shi ( ni geng xin de biao huo shi tu suo yi lai de dui xiang ji he bu hui diu shi ), yong wo zhi qian de li zi lai kan ,vCustomersB yi lai yu vCustomersA, na me dang wo men xiu gai le vCustomersA yi hou ,vCustomersB yu vCustomersA zhi jian de yi lai guan xi jiang hui diu shi er vCustomersA suo yi lai de Customers jiang bu hui diu shi ( yi lai guan xi zai dui xiang chuang jian huo geng xin shi chuang jian , geng xin shi , hui ba xian qian de yi lai guan xi shan diao )。( tiao yong sp_depends ni jiu ke yi kan chu lai zhe zhong wei miao de bian hua ) xi wang zai ni yue du le ben wen yi hou , ni zai shi yong shi tu de shi hou hui geng jia de de xin ying shou , bi mian cuo wu fa sheng 。 wen zhong you bu dui de di fang huan ying zhi zheng pi ping !
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