This is one of the reasons why we - in ALLL our database types - disallow NULL values. All fields should have (default) values.
Also try to think about what will become of data when exported as CSV, which most modern databases support. CSV does not know the difference between 1,,2 and 1,"",2 (by default), so inserting exported data somewhere else might alter your data.
This is also one of the major reasons why I thoroughly hate Oracle. If I insert an empty string into a varchar field in Oracle, it helpfully inserts a NULL instead. HATE HATE HATE. Also see here.
I for one do not see perl's undef being wrong here, but the inconsistency in databases. OTOH I could see value in a new constant really being NULL.
Enjoy, Have FUN! H.Merijn
Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
Read Where should I post X? if you're not absolutely sure you're posting in the right place.
Please read these before you post! —
Posts may use any of the Perl Monks Approved HTML tags:
Outside of code tags, you may need to use entities for some characters:
- a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
Link using PerlMonks shortcuts! What shortcuts can I use for linking?
See Writeup Formatting Tips and other pages linked from there for more info.
| & || & |
| < || < |
| > || > |
| [ || [ |
| ] || ] |