X xuelun2003 Unregistered / Unconfirmed GUEST, unregistred user! 2007-04-13 #1 想要将一个字段的值设为空值，不是空串 如何做
S songrun Unregistered / Unconfirmed GUEST, unregistred user! 2007-04-13 #2 update table_name set fd_name=null where ...
