Question

我正在尝试将记录从table1填充到table2。 table1有三列，没有主键。 Table2有三个相同的列，标识列作为主键。以下是我的查询和定义。但不知怎的，我收到了一个错误，无法将值NULL插入列＆＃39; notes_id＆＃39;，table＆＃39; table1;列不允许空值。 INSERT失败。该语句已终止。我错过了什么？

CREATE TABLE [dbo].[table1](
    [notes_id] [int] NOT NULL,
    [acty_id] [varchar](80) NOT NULL,
    [notes_datetime] [datetime] NOT NULL,
    [notes_data] [nvarchar](max) NULL,
 CONSTRAINT [PK_tblSRMNotes] PRIMARY KEY CLUSTERED 
(
    [notes_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]

CREATE TABLE [dbo].[table2](
    [acty_id] [varchar](80) NOT NULL,
    [notes_datetime] [datetime] NOT NULL,
    [notes_data] [nvarchar](max) NULL
) ON [PRIMARY]

insert into table1(acty_id, notes_datetime, notes_data)
    select s.acty_id, s.notes_datetime, s.notes_data
    from table2 s

Answer 1

您已将第一列设置为NOT NULL，并将其声明为PRIMARY KEY，但您尚未指出应如何填充它。通常这是通过IDENTITY列：

CREATE TABLE [dbo].[table1]
(
    [notes_id] [int] IDENTITY(1,1) NOT NULL,
---------------------^^^^^^^^^^^^^
    [acty_id] [varchar](80) NOT NULL,
    [notes_datetime] [datetime] NOT NULL,
    [notes_data] [nvarchar](max) NULL,
    CONSTRAINT [PK_tblSRMNotes] PRIMARY KEY CLUSTERED (notes_id)
);

如何将日期从table1填充到table2？

1 个答案: