Hello, On Samstag, 19. Oktober 2002 06:07, ajit_cus wrote: > Hi, > So what does null correspond to the real world? Easy real world example: You have an address table with a column for the fax number. Some people have got fax, some haven't, still others may have got, but you don't know. For someone who got no fax you set faxnum to ''. For someone you don't know if he got a fax you set the number to NULL. So you can always see whom you have to ask if he got a fax (where faxnum is null) and who you have already asked but who hasn't (where faxnum='').
Example OK? [Oracle seems not to differentiate betwenn empty string and null, afaik.] Peter Willadt _______________________________________________ sapdb.general mailing list [EMAIL PROTECTED] http://listserv.sap.com/mailman/listinfo/sapdb.general
