How to Store NULL in datetime datatype

[Vajrala Narendra]

Hi am working with asp.net with backend Sql2000

i want to store NULL in datetime datatype field through coding. i wrote a update statement as
Update table set Date1='NULL' where ........
but while updating it is giving error converting varchar to datetime

how to store NULL in that field
please respond

Thanks in Advance

[r035198x]

Don't put the quotes around NULL. The quotes are the ones making it a string.