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图书馆管理系统建模设计

由PDM对象自动生成的数据库脚本文件代码如下：

if exists (select 1

from dbo.sysreferences r join dbo.sysobjects o on (o.id = r.constid and o.type = 'F')

where r.fkeyid = object_id('books') and o.name = 'FK_BOOKS_管理书籍_ADMIN') alter table books

drop constraint FK_BOOKS_管理书籍_ADMIN go

if exists (select 1

from dbo.sysreferences r join dbo.sysobjects o on (o.id = r.constid and o.type = 'F') where r.fkeyid =

object_id('borrow_information') and o.name = 'FK_BORROW_I_BORROW_IN_BOOKS') alter table borrow_information drop constraint

FK_BORROW_I_BORROW_IN_BOOKS go

if exists (select 1

from dbo.sysreferences r join dbo.sysobjects o on (o.id = r.constid and

o.type = 'F') where r.fkeyid =

object_id('borrow_information') and o.name = 'FK_BORROW_I_BORROW_IN_READER') alter table borrow_information drop constraint

FK_BORROW_I_BORROW_IN_READER go

if exists (select 1

from dbo.sysreferences r join dbo.sysobjects o on (o.id = r.constid and o.type = 'F')

where r.fkeyid = object_id('login') and o.name = 'FK_LOGIN_LOGIN_ADMIN') alter table login

drop constraint FK_LOGIN_LOGIN_ADMIN go

if exists (select 1

from dbo.sysreferences r join dbo.sysobjects o on (o.id = r.constid and o.type = 'F')

where r.fkeyid = object_id('login') and o.name = 'FK_LOGIN_LOGIN2_READER') alter table login

drop constraint FK_LOGIN_LOGIN2_READER go

if exists (select 1

from dbo.sysreferences r join dbo.sysobjects o on (o.id = r.constid and o.type = 'F') where r.fkeyid =

object_id('reversation') and o.name = 'FK_REVERSAT_REVERSATI_BOOKS') alter table reversation drop constraint

FK_REVERSAT_REVERSATI_BOOKS go

if exists (select 1

from dbo.sysreferences r join dbo.sysobjects o on (o.id = r.constid and o.type = 'F') where r.fkeyid =

object_id('reversation') and o.name = 'FK_REVERSAT_REVERSATI_READER') alter table reversation drop constraint

FK_REVERSAT_REVERSATI_READER go

if exists (select 1

from sysindexes

where id = object_id('admin')

and name = '权限_FK' and indid > 0 and indid < 255) drop index admin.权限_FK go

if exists (select 1

from sysobjects where id = object_id('admin')

and type = 'U') drop table admin go

if exists (select 1

from sysindexes where id = object_id('books')

and name = '管理书籍_FK' and indid > 0 and indid < 255) drop index books.管理书籍_FK go

if exists (select 1

from sysindexes where id = object_id('books')

and name = '图书类型_FK' and indid > 0 and indid < 255) drop index books.图书类型_FK go

if exists (select 1

from sysobjects where id = object_id('books')

and type = 'U') drop table books go

if exists (select 1

from sysobjects where id = object_id('booktype')

and type = 'U') drop table booktype go

if exists (select 1

from sysindexes where id = object_id('borrow_information') and name = 'Association_2_FK'

and indid > 0 and indid < 255)

drop index

borrow_information.Association_2_FK go

if exists (select 1

from sysindexes where id = object_id('borrow_information') and name = 'Association_1_FK'

and indid > 0 and indid < 255) drop index

borrow_information.Association_1_FK go

if exists (select 1

from sysobjects where id =

object_id('borrow_information') and type = 'U') drop table borrow_information go

if exists (select 1

from sysindexes where id = object_id('login')

and name = 'login2_FK' and indid > 0 and indid < 255)