唯一标识符 Sql

Question

以下是 asp 会员提供者表。我正在尝试添加同一应用程序的多个用户，但我无法在 ApplicationId 列中添加重复值。为什么会这样？

这是我用来在表中插入记录的查询：

Insert into Users 
values ('97C84F32-26A6-4A6C-960E-89A6A14D54E4', 'C2CADEDE-DA70-4C25-B717-6970344C8B34', 'John_doe', '', '', 1, '2014-11-05 21:28:33.043')

Insert into Users 
values ('97C84F32-26A6-4A6C-960E-89A6A14D54E4', 'D2CADEDE-CA70-4C25-B717-6970344C8B34', 'John_doe1', '', '', 1, '2014-11-05 21:28:33.043')

错误

无法在具有唯一索引“aspnet_Users_Index”的对象“dbo.Users”中插入重复的键行。重复键值为 (97c84f32-26a6-4a6c-960e-89a6a14d54e4, )。

这是我的用户表查询：

CREATE TABLE [dbo].[Users]
(
    [ApplicationId] [uniqueidentifier] NOT NULL,
    [UserId] [uniqueidentifier] NOT NULL,
    [UserName] [nvarchar](256) NOT NULL,
    [LoweredUserName] [nvarchar](256) NOT NULL,
    [MobileAlias] [nvarchar](16) NULL,
    [IsAnonymous] [bit] NOT NULL,
    [LastActivityDate] [datetime] NOT NULL,

    PRIMARY KEY NONCLUSTERED ([UserId] ASC)
        WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, 
              ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]
GO

ALTER TABLE [dbo].[Users] ADD  DEFAULT (newid()) FOR [UserId]
GO

ALTER TABLE [dbo].[Users] ADD  DEFAULT (NULL) FOR [MobileAlias]
GO

ALTER TABLE [dbo].[Users] ADD  DEFAULT ((0)) FOR [IsAnonymous]
GO

ALTER TABLE [dbo].[Users] WITH CHECK 
    ADD FOREIGN KEY([ApplicationId])
    REFERENCES [dbo].[Applications] ([ApplicationId])
GO

任何帮助将不胜感激

Answer 1

您遇到的错误是因为您的桌子上有一个PRIMARY KEY UserId 列。这意味着您无法在该列中插入具有相同值的多行。

如果您想插入相同的UserId 但具有不同的ApplicationId，您应该将主键更改为包含UserId 和ApplicationId 的复合键。

或者，您的 INSERT 语句可能需要更改，因为您依赖于正确的列位置。而是指定列：

Insert into Users
(ApplicationId, UserId, UserName, LoweredUserName, MobileAlias, IsAnonymous, LastActivityDate)
values
('97C84F32-26A6-4A6C-960E-89A6A14D54E4','C2CADEDE-DA70-4C25-B717-6970344C8B34','John_doe','','',1,'2014-11-05 21:28:33.043')

Insert into Users
(ApplicationId, UserId, UserName, LoweredUserName, MobileAlias, IsAnonymous, LastActivityDate)
values
('97C84F32-26A6-4A6C-960E-89A6A14D54E4','D2CADEDE-CA70-4C25-B717-6970344C8B34','John_doe1','','',1,'2014-11-05 21:28:33.043')

更新

经过一番研究，aspnet_Users 表默认在UserId 和LoweredUserName 上有一个唯一索引。只需指定一个唯一的 LoweredUserName 值：

Insert into Users
(ApplicationId, UserId, UserName, LoweredUserName, MobileAlias, IsAnonymous, LastActivityDate)
values
('97C84F32-26A6-4A6C-960E-89A6A14D54E4','C2CADEDE-DA70-4C25-B717-6970344C8B34','John_doe','john doe','',1,'2014-11-05 21:28:33.043')

Insert into Users
(ApplicationId, UserId, UserName, LoweredUserName, MobileAlias, IsAnonymous, LastActivityDate)
values
('97C84F32-26A6-4A6C-960E-89A6A14D54E4','D2CADEDE-CA70-4C25-B717-6970344C8B34','John_doe1','john_doe1','',1,'2014-11-05 21:28:33.043')