我有一个金融应用程序,我每天都存储股票数据,所以我从 Ticker
以及 Date
.
我还需要 Ticker
(这是上述复合键的一部分)另一个表的外键,称为 Tickers
.
但是,当我在SQLServerManagementStudio中添加外键关系时,它要求我为这两个列提供链接 Ticker
以及 Date
,而ticker表只包含 Ticker
(这是我只想绑定的内容)。
你知道我做错了什么吗?这是不可能的吗?
我的表格如下:
CREATE TABLE [dbo].[Tickers](
[Ticker] [nvarchar](8) NOT NULL,
[Name] [nvarchar](50) NOT NULL,
[Market] [int] NOT NULL,
[Locale] [int] NOT NULL,
[Type] [int] NOT NULL,
[Active] [bit] NOT NULL,
[PrimaryExch] [nvarchar](50) NOT NULL,
[Updated] [datetime2](7) NOT NULL,
[Currency] [int] NOT NULL,
CONSTRAINT [PK_Tickers] PRIMARY KEY CLUSTERED
(
[Ticker] 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
CREATE TABLE [dbo].[AggregateDay](
[Ticker] [nchar](8) NOT NULL,
[Date] [date] NOT NULL,
[Volume] [decimal](18, 0) NULL,
[Open] [decimal](18, 0) NULL,
[Close] [decimal](18, 0) NULL,
[High] [decimal](18, 0) NULL,
[Low] [decimal](18, 0) NULL,
[Samples] [int] NULL,
CONSTRAINT [PK_AggregateDay] PRIMARY KEY CLUSTERED
(
[Ticker] ASC,
[Date] 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
1条答案
按热度按时间mepcadol1#
设置中的一个问题是父列和子列的数据类型不同:
[dbo].[Tickers]([Ticker])
是[nvarchar](8)
,而[dbo].[AggregateDay](Ticket)
是[nchar](8)
.如果将两种数据类型对齐,则可以创建关系,如下所示:
db小提琴演示