Agreed. I think with DB's in particular a sound understanding of how they do their business is very useful. Both in DB design and in writing efficient queries. In fact the number of times that I've heard people say "I dont need to know how DB's work, its a black box" was a motivation for writing this node.
As is my current situation of helping people who write code that uses Apples WebObjects java framework. WO presents objects to the programmer that represents database rows - but the programmer has no control over how these rows are fetched. In general it works OK, but when it doesn't it's a major PITA to try to find a way to make it work at a reasonable speed.

Michael


In reply to Re^3: Bitten by the worst case (or why it pays to know whats inside the black box) by mpeppler
in thread Bitten by the worst case (or why it pays to know whats inside the black box) by demerphq

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":



  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • 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:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, 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, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.