Visual Studio项目错误

Question

This is my table as shown in image

This is my stored procedure for insert

but when I am trying to execute it with my project project shows error as below.

ERROR:

Cannot insert the value NULL into column 'SID', table 'AttDemo.dbo.StdMst'; column does not allow nulls. INSERT fails.
The statement has been terminated.

Answer 1

The easiest way to fix this would be to set the primary key to autoincrement / as an Identity.

Alternatively, you could change This:

GO
SET QUOTED_IDENTIFIER ON
GO
CREATE PROCEDURE [dbo].[STDMST_INSERT]

    @STDNAME AS NVARCHAR (50)
AS
BEGIN

    INSERT INTO (StdMst (StdName, EDate) VALUES(@STDNAME, GETDATE())

END
GO

To this:

GO
SET QUOTED_IDENTIFIER ON
GO
CREATE PROCEDURE [dbo].[STDMST_INSERT]

    @STDNAME AS NVARCHAR (50)
AS
BEGIN

    INSERT INTO (StdMst (SID, StdName, EDate) VALUES(IDENT_CURRENT('StdMst'), @STDNAME, GETDATE())

END
GO

The issue you are having is that your primary key does not allow NULL values and is not set to autoincrement.

Here are some useful links:

Set Primary Key as Identity
Setting key to autoincrement

Answer 2

看起来您认为您的SID列是IDENTITY列，但事实并非如此。