如何将默认属性值设置为今天的日期-MS SQL Server

Question

I am building a database application with C# in Visual Studio 2013. The application is meant to email a customer 90 days after the date of their visit so, when they come in, their info is taken and today's date is stored with their other information.

I have a table called Customer ready to store customer information but instead of having the user type the date for each customer and risk them screwing up the format, I would like the default value for the column named DateOfVisit to be today's date.

I am looking for what to type into the default column. Something along the lines of getDate() that will give me today's date in a format that I can easily check against another future date and see if 90 days have past or not.

EXTRA: From the picture, you may notice I have the emailFlag 's data type set to bit because I thought that would be the closest thing to a boolean. The purpose of emailFlag is that before a customer is sent an email, that flag will be checked and if it's false the email will go through and the flag will be set to true, so as to avoid spamming the customer emails in case the program messes up. Is this a good idea? Do you have any suggestions as to how I could do it better?

tl;dr
I need a method that will give me today's date to store in a database and that I can compare with other dates.

Answer 1

Try this:

In case you already have the table created

Alter Table dbo.customer Drop Column DateOfVisit;

Lets alter the table and add a field with the deafult value date

Alter Table dbo.customer ADD DateOfVisit DATETIME NOT NULL DEFAULT (GETDATE());