如何在SQL中组织问题和答案？

Question

我需要在我的SQL（Azure）服务器中构建'问题和答案'的良好结构。 我想在做这种方式：

table question 
    id float (we could have lots of questions, so that's why float and don't int) 
    nvarchar question (question can vary in size of characters) 
    id_answer float 

table answer 
    id float 
    nvarchar answer 

这是在您看来，一个好办法吗？ 我不得不考虑不同类型的问题，我能有这样的问题：

question: Who invented the lamp ? 
answer: Thomas Edson 

question: Thomas Edson invested the lamp ? 
answer: No. (true or false) 

难道你们知道一些其他的好办法做到这一点？

谢谢。

Answer 1

上次我做了一个Q &一个系统处理由多页问题组成的调查。答案可以是复选框，单选按钮或多选的选择框，或文本输入（可选地限制为整数值）。

的表看起来是这样的：

-- There are pages of questions. 

CREATE TABLE [dbo].[Pages] (
    [PageId] [int] IDENTITY (1, 1) NOT NULL , 
    [Name] [varchar] (128) COLLATE SQL_Latin1_General_CP1_CI_AS NOT NULL , 
    [Description] [varchar] (1024) COLLATE SQL_Latin1_General_CP1_CI_AS NOT NULL , 
    [PageTypeId] [int] NOT NULL 
) ON [PRIMARY] 
GO 

CREATE TABLE [dbo].[PageTypes] (
    [PageTypeId] [int] IDENTITY (1, 1) NOT NULL , 
    [Name] [varchar] (32) COLLATE SQL_Latin1_General_CP1_CI_AS NOT NULL , 
    [Description] [varchar] (1024) COLLATE SQL_Latin1_General_CP1_CI_AS NOT NULL 
) ON [PRIMARY] 
GO 

CREATE TABLE [dbo].[TargetPages] (
    [QuestionId] [int] NOT NULL , 
    [PageId] [int] NOT NULL , 
    [Rank] [int] NOT NULL 
) ON [PRIMARY] 
GO 

-- Questions have input fields. Perhaps a text entry, perhaps several multiple-guess choices. 

CREATE TABLE [dbo].[Questions] (
    [QuestionId] [int] IDENTITY (1, 1) NOT NULL , 
    [StartDate] [datetime] NOT NULL , 
    [EndDate] [datetime] NOT NULL , 
    [Description] [varchar] (1024) COLLATE SQL_Latin1_General_CP1_CI_AS NOT NULL , 
    [Filespec] [varchar] (128) COLLATE SQL_Latin1_General_CP1_CI_AS NOT NULL 
) ON [PRIMARY] 
GO 

CREATE TABLE [dbo].[Fields] (
    [QuestionId] [int] NOT NULL , 
    [FieldId] [int] IDENTITY (1, 1) NOT NULL , 
    [FieldName] [varchar] (64) COLLATE SQL_Latin1_General_CP1_CI_AS NOT NULL , 
    [InputTypeId] [int] NOT NULL , 
    [Description] [varchar] (256) COLLATE SQL_Latin1_General_CP1_CI_AS NOT NULL 
) ON [PRIMARY] 
GO 

CREATE TABLE [dbo].[InputTypes] (-- Roughly: checkbox, radio button, text, textarea or select list. 
    [InputTypeId] [int] IDENTITY (1, 1) NOT NULL , 
    [InputTypeName] [varchar] (50) COLLATE SQL_Latin1_General_CP1_CI_AS NOT NULL , 
    [Choices] [bit] NOT NULL , 
    [NumericValue] [bit] NOT NULL 
) ON [PRIMARY] 
GO 

CREATE TABLE [dbo].[Choices] (-- Defines radio button or select list choices for multiple choice questions. 
    [FieldId] [int] NOT NULL , 
    [cName] [varchar] (64) COLLATE SQL_Latin1_General_CP1_CI_AS NOT NULL , 
    [cValue] [varchar] (64) COLLATE SQL_Latin1_General_CP1_CI_AS NOT NULL , 
    [Rank] [int] NOT NULL 
) ON [PRIMARY] 
GO 

-- Then we have the answers supplied by users. 

CREATE TABLE [dbo].[Inquiries] ( 
    [InquiryId] [int] IDENTITY (1, 1) NOT NULL , 
    [UserId] [int] NOT NULL , 
    [QuestionId] [int] NOT NULL , 
    [dTimestamp] [datetime] NOT NULL , 
    [ResponseSequence] [int] NOT NULL 
) ON [PRIMARY] 
GO 

CREATE TABLE [dbo].[Users] (
    [UserId] [int] IDENTITY (1, 1) NOT NULL , 
    [Username] [varchar] (16) COLLATE SQL_Latin1_General_CP1_CI_AS NOT NULL 
) ON [PRIMARY] 
GO 

CREATE TABLE [dbo].[Responses] (-- Multiple choice. 
    [InquiryId] [int] NOT NULL , 
    [FieldId] [int] NOT NULL , 
    [FieldValue] [varchar] (1024) COLLATE SQL_Latin1_General_CP1_CI_AS NOT NULL 
) ON [PRIMARY] 
GO 

CREATE TABLE [dbo].[IntegerResponses] (-- User supplied integer or multiple choice value. 
-- NB: Checkbox values are handled thusly: a row here indicates the box was checked, no row is unchecked. The value is meaningless. 
    [InquiryId] [int] NOT NULL , 
    [FieldId] [int] NOT NULL , 
    [FieldValue] [int] NOT NULL 
) ON [PRIMARY] 
GO 

CREATE TABLE [dbo].[TextResponses] (-- User supplied text. 
    [InquiryId] [int] NOT NULL , 
    [FieldId] [int] NOT NULL , 
    [FieldValue] [varchar] (1024) COLLATE SQL_Latin1_General_CP1_CI_AS NOT NULL 
) ON [PRIMARY] 
GO 
exec sp_addextendedproperty N'MS_Description', N'1 ==> Values are in the Choices table.', N'user', N'dbo', N'table', N'InputTypes', N'column', N'Choices' 
GO 
exec sp_addextendedproperty N'MS_Description', N'1 ==> Values are numeric.', N'user', N'dbo', N'table', N'InputTypes', N'column', N'NumericValue' 
GO 

的查询不停地运行到上允许的SELECT，256左右的表的数量限制。

Answer 2

这取决于您的问题将如何构建。

如果您有自由文本输入，只有一个正确的答案，那么将问题与答案分开是没有意义的，因此在问题表中有一个答案字段。但是你依靠正确的拼写，等等。

如果你打算有一个问题的多项选择答案，那么你会希望在Answers表中有QuestionID，而不是你上面的设置。

您可以在问答之间另外添加一个表格，因此答案可以是对多个问题的答案。

而你的ID想要是整数，而不是浮动;如果您超出了整数范围，请使用uniqueidentifiers。花车不是精确

Answer 3

我肯定不会去浮动，因为它是一个非精确的和非确定性的数据类型。尝试使用bigint代替。 据我所知，浮动很难投入索引。不知道有关SQL数据库（天蓝色）和/或SQL Server 2012虽然