use current date as default value for a column

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心在旅途
心在旅途 2021-02-02 04:43

Is there a way to set the default value of a column to DateTime.Now in Sql Server?

Example:

table Event
Id int (auto-increment) not null
Des         


        
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8条回答
  • 2021-02-02 05:19

    Right click on the table and click on Design,then click on column that you want to set default value.

    Then in bottom of page in column properties set Default value or binding to : 'getdate()'

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  • 2021-02-02 05:23

    You can use:

    Insert into Event(Description,Date) values('teste', GETDATE());
    

    Also, you can change your table so that 'Date' has a default, "GETDATE()"

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  • 2021-02-02 05:23

    To use the current date as the default for a date column, you will need to:

    1- open table designer

    2- select the column

    3- go to column proprerties

    4- set the value of Default value or binding propriete To (getdate())

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  • 2021-02-02 05:25

    Add a default constraint with the GETDATE() function as value.

    ALTER TABLE myTable 
      ADD CONSTRAINT CONSTRAINT_NAME
        DEFAULT GETDATE() FOR myColumn
    
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  • 2021-02-02 05:28

    Table creation Syntax can be like:

    Create table api_key(api_key_id INT NOT NULL IDENTITY(1,1) 
    PRIMARY KEY, date_added date DEFAULT 
    GetDate());
    

    Insertion query syntax can be like:

    Insert into api_key values(GETDATE());
    
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  • 2021-02-02 05:31

    I have also come across this need for my database project. I decided to share my findings here.

    1) There is no way to a NOT NULL field without a default when data already exists (Can I add a not null column without DEFAULT value)

    2) This topic has been addressed for a long time. Here is a 2008 question (Add a column with a default value to an existing table in SQL Server)

    3) The DEFAULT constraint is used to provide a default value for a column. The default value will be added to all new records IF no other value is specified. (https://www.w3schools.com/sql/sql_default.asp)

    4) The Visual Studio Database Project that I use for development is really good about generating change scripts for you. This is the change script created for my DB promotion:

    GO
    PRINT N'Altering [dbo].[PROD_WHSE_ACTUAL]...';
    
    GO
    ALTER TABLE [dbo].[PROD_WHSE_ACTUAL]
        ADD [DATE] DATE DEFAULT getdate() NOT NULL;
    

    -

    Here are the steps I took to update my database using Visual Studio for development.

    1) Add default value (Visual Studio SSDT: DB Project: table designer)

    2) Use the Schema Comparison tool to generate the change script.

    code already provided above
    

    3) View the data BEFORE applying the change.

    4) View the data AFTER applying the change.

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