Re: Impossible join?

2005-07-18 Thread Dawid Kuroczko
On 7/16/05, Jonathan Mangin <[EMAIL PROTECTED]> wrote: > Hello all, > > I'm storing data from a series of tests throughout each > 24-hour period. I thought to create a table for each test. > (There are six tests, lots more cols per test, and many > users performing each test.) > > select test1.d

Re: Efficient select/insert

2005-04-29 Thread Dawid Kuroczko
On 4/26/05, Jonathan Mangin <[EMAIL PROTECTED]> wrote: > I would like to select several rows from one table > and insert them into another nearly identical table > using Perl/DBI: > > my @array = $q->param(); # HTML checkboxes > > foreach my $element (@array) { >my $sql = "select col2, col3,

Re: Get a Random Row on a HUGE db

2005-04-27 Thread Dawid Kuroczko
On 4/26/05, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote: > > I am wanting to display a random page from my site, But I have over 12,000 > articles right now and we add over 150 per day. What I wound up doing was a > Virtual DOS attack on my own server because the 40 mb db was being loaded to > m

Re: why NOT NULL in PRIMARY key??

2005-04-27 Thread Dawid Kuroczko
On 4/26/05, Jay Blanchard <[EMAIL PROTECTED]> wrote: > [snip] > The same is true for any other value... Now that the columns have a NOT > NULL > constraint the records that previously contained NULL now hold '0'. > > x y > x 0 > x z > x 0 > > Now, how do you uniquely identify the 2nd and 4th rows

Re: why NOT NULL in PRIMARY key??

2005-04-26 Thread Dawid Kuroczko
On 4/26/05, Jigal van Hemert <[EMAIL PROTECTED]> wrote: > And http://dev.mysql.com/doc/mysql/en/create-table.html tells me that "A > PRIMARY KEY is a unique KEY where all key columns must be defined as NOT > NULL. If they are not explicitly declared as NOT NULL, MySQL declares them > so implicitly

Re: Database languages supported by MySQL

2005-04-26 Thread Dawid Kuroczko
On 4/25/05, Ochungo, Pamela (ILRI) <[EMAIL PROTECTED]> wrote: > Hallo, > > I would like to know whether there are any other languages supported by MySQL > apart from SQL. > e.g. MsAccess provides VB for aplications. Does MySQL support any such lower > level language? I believe you are asking a