Beefy Boxes and Bandwidth Generously Provided by pair Networks
Clear questions and runnable code
get the best and fastest answer

comment on

( [id://3333] : superdoc . print w/replies, xml ) Need Help??

Dynamic SQL is dynamic SQL no matter where you construct it. There are times when it is the way to go, but you should try to keep them to a minumum. A (possibly generated) structure of

IF (@Whatever is not NULL) IF (@Other is not NULL) SELECT ... WHERE @Whatever = Whatever and @Other = Other ELSE SELECT .. WHERE @Whatever = Whatever ...
Tends to perform better if used often. Just make sure it doesn't get way too big. And keep in mind that if there is no index on a column (@Whatever is NULL or @Whatever = Whatever) is enough, no need to test that variable in an IF and use separate selects.

Enoch was right!
Enjoy the last years of Rome.

In reply to Re: perl & SQL best practices by Jenda
in thread perl & SQL best practices by ksublondie

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

  • Are you posting in the right place? Check out Where do I post X? to know for sure.
  • Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
    <code> <a> <b> <big> <blockquote> <br /> <dd> <dl> <dt> <em> <font> <h1> <h2> <h3> <h4> <h5> <h6> <hr /> <i> <li> <nbsp> <ol> <p> <small> <strike> <strong> <sub> <sup> <table> <td> <th> <tr> <tt> <u> <ul>
  • Snippets of code should be wrapped in <code> tags not <pre> tags. In fact, <pre> tags should generally be avoided. If they must be used, extreme care should be taken to ensure that their contents do not have long lines (<70 chars), in order to prevent horizontal scrolling (and possible janitor intervention).
  • Want more info? How to link or How to display code and escape characters are good places to start.