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  • sqlserver 2014 删除主键约束

    select * from dict where DictCode != '' and PId=5
    
    truncate table menu
    
    SELECT * FROM sys.foreign_keys
    WHERE referenced_object_id=OBJECT_ID('menu'); --找到引用该表的外键
    
    --ALTER TABLE dbo.XX DROP constraint FK_User_XX
    
    ALTER TABLE dbo.RoleMenu DROP constraint FK_Menu_RoleMenu --删除外键
    
    select * 
    from sys.foreign_keys 
    where referenced_object_id=object_id('menu')
    order by 1  --查询引用的外键
    
     alter table menu drop constraint FK_dbo.RoleMenu_dbo.Menu_MenuId
    
    
     select
        fk.name,fk.object_id,OBJECT_NAME(fk.parent_object_id) as referenceTableName
    from sys.foreign_keys as fk
    join sys.objects as o on fk.referenced_object_id=o.object_id
    where o.name='menu'
    
     --    得到  外键消息 FK__photo__x_id__6991A7CB -- 得到 FK_dbo.RoleMenu_dbo.Menu_MenuId
    
      ALTER TABLE dbo.RoleMenu  DROP CONSTRAINT Menu_MenuId
    
     select fk.name,fk.object_id,object_name(fk.parent_object_id) as referencetablename
    from sys.foreign_keys as fk
    join sys.objects as o on fk.referenced_object_id=o.object_id
    where o.name = 'Menu'
    
    
    alter table RoleMenu
    drop constraint  FK_RoleMenu_Menu_MenuId
    ALTER TABLE 表名 
    DROP CONSTRAINT 约束名
    
    
    ALTER TABLE Menu 
    DROP CONSTRAINT FK_dbo.RoleMenu_dbo.Menu_MenuId

    以上代码测试均失败,

    最后, 直接删除表主键

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  • 原文地址:https://www.cnblogs.com/enych/p/10049649.html
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