Msg 8152 字符串或二进制数据将被截断

Question

我知道之前有人问过这个问题，但是 none 的答案正在解决这个问题，需要另一双眼睛。我正在尝试创建一个 table 并为其添加一些值。我没有任何价值限制，所以我不确定为什么会收到我收到的错误。

CREATE TABLE [dbo].[AvailableTime]
(
    [Id] [INT] IDENTITY(1,1) NOT NULL,
    [TimeString] [NCHAR] NOT NULL,
    [TimeValue] [NCHAR] NOT NULL,
    [CompanyId] [INT] NOT NULL,
    [CompanyName] [NVARCHAR](MAX) NULL,
    [LocationId] [INT] NOT NULL,
    [LocationName] [NVARCHAR] NOT NULL,
    [IsClaimed] [BIT] NOT NULL,

    CONSTRAINT [PK_AvailableTime] 
        PRIMARY KEY CLUSTERED ([Id] ASC)
                    WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, 
                          IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, 
                          ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY] TEXTIMAGE_ON [PRIMARY]
GO

INSERT INTO dbo.AvailableTime (TimeString, TimeValue, CompanyId, CompanyName, 
                               LocationId, LocationName, IsClaimed) 
VALUES ('2019-01-07T00:00:00', '12:00 AM', 1, 'Company', 
        2, 'Inver Grove', 'FALSE');

Answer 1

您需要在 table 中声明 CHAR 和 VARCHAR 字段的大小：

CREATE TABLE [dbo].[AvailableTime]
(
    [Id] [INT] IDENTITY(1,1) NOT NULL,
    [TimeString] [NCHAR](50)  NOT NULL,
    [TimeValue] [NCHAR](50)  NOT NULL,
    [CompanyId] [INT] NOT NULL,
    [CompanyName] [NVARCHAR](MAX) NULL,
    [LocationId] [INT] NOT NULL,
    [LocationName] [NVARCHAR](50) NOT NULL,
    [IsClaimed] [BIT] NOT NULL,

    CONSTRAINT [PK_AvailableTime] 
        PRIMARY KEY CLUSTERED ([Id] ASC)
                    WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, 
                          IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, 
                          ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY] TEXTIMAGE_ON [PRIMARY]
GO

Answer 2

您永远不应指定 CHAR、VARCHAR、NCHAR 或 NVARCHAR 列（或变量或参数）而没有 指定显式 length!

如果省略特定长度，在某些情况下，您最终会得到 正好一个字符 长度的变量或列！这通常不是您想要的！

另外： 为什么要将 TimeString 和 TimeValue 存储为 NCHAR？没有任何意义 - 使用 最合适的 数据类型 - 在这里，这将是 DATETIME2(n) 和 TIME.

所以像这样定义你的 table:

CREATE TABLE [dbo].[AvailableTime]
(
    [Id] [INT] IDENTITY(1,1) NOT NULL,
    [TimeString] DATETIM2(0) NOT NULL,
    [TimeValue] TIME(0) NOT NULL,
    [CompanyId] [INT] NOT NULL,
    [CompanyName] [NVARCHAR](MAX) NULL,
    [LocationId] [INT] NOT NULL,
    [LocationName] [NVARCHAR](100) NOT NULL,
    [IsClaimed] [BIT] NOT NULL,

你应该没事的。

Answer 3

您在插入查询时出错，最后一列中的类型不匹配。

INSERT INTO dbo.AvailableTime (TimeString, TimeValue, CompanyId, CompanyName, 
    LocationId, LocationName, IsClaimed)
  VALUES ('2019-01-07T00:00:00', '12:00 AM', 1, 'Company', 2, 'Inver Grove', 0);

Msg 8152 字符串或二进制数据将被截断

Msg 8152 String or binary data would be truncated

sql-server

create-table

sql-insert