Keyboard keys used to enter a null into db table field

Hey All,

Once upon a time I knew which keyboard keys were used when entering a null value into a field. For example, say there is a value in a date column and I want to change it back to null. I can't seem to remember what the key combination on the keyboard is..I think it involve the + and a combonation of two others...It's a small detail but now that's it's on the brain I'd like to know what it is again - If you know, please remind me - ThanksIts ctrl+0|||That's great - Thanks.