问题描述
我正在使用 SSIS 包填充表格.
I am populating a table using an SSIS package.
这个想法是,每当包上传到表时,它都会使用 getdate()
对值进行时间戳.
The idea is that whenever the package uploads to the table, it will timestamp the value using getdate()
.
当我打开它时,我的 DDL 看起来是这样的:
My DDL looks like this when I open it up:
CREATE TABLE [REPORTING].[post_ssis_table_1](
[validation_key] [int] IDENTITY(1,1) NOT NULL,
[ssis_ran_date] [datetime] NULL,
[server_name] [varchar](255) NULL,
[data_base] [varchar](255) NULL,
--A bunch of other irrelevant columns
[success_status] [varchar](255) NULL,
[success_criteria] [varchar](255) NULL,
PRIMARY KEY CLUSTERED
(
[validation_key] 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
ALTER TABLE [REPORTING].[post_ssis_tbl_1] ADD DEFAULT (getdate()) FOR [ssis_ran_date]
GO
注意:我没有输入alter语句,这就是我打开DDL时的样子.
Note: I did not type the alter statement, that's literally what it looks like when I open up the DDL.
为什么在我插入行时没有为 [ssis_ran_date] 填充默认值?它实际上只是保持为空.
Why is the default value not populating for [ssis_ran_date] when I insert rows? It literally just stays null.
推荐答案
如果您的 INSERT 语句为具有默认值的列指定 NULL,则将插入 NULL.
If your INSERT statement specifies NULL for a column with a default, then NULL will get inserted.
只有在 INSERT 中根本没有指定该列时才会使用默认值.
The default will only be used when that column is not specified in the INSERT at all.
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