Web Forms :: Isnert Todays Date Automatically When Data Is Inserted Through Form In DataBase?

I had created Data Entry webform. Data is stored in Database. I have created 'Date' coloumn in database table with data type datetime. I want to isnert todays date automatically when data is inserted through form in DataBase.My current query to store data in database is:

public bool MyData(string COL1,string COL2,string COL3,string COL4,string COL5)
{
string SQL = "insert into TABLE values('" + COL1+ "','" + COL2+ "','" + COL3 + "','" + COL4 + "','" + COL5 + "')";
}