Re: Help with MySQL SELECT loop
| From: | olinux | Date: | Tue, 22 Jan 2002 20:39:49 +0000 |
| Subject: | Re: Help with MySQL SELECT loop | ||
| References: | 1 | Groups: | php.db |
| Request: | Send a blank email to php-db+get-16064@lists.php.net to get a copy of this message | ||
no need to create a temporary table
Check out aliases and the mysql count function
query will be something like
$sql = "SELECT count(song_id) as how_many from table
WHERE genre = '$genre'";
olinux
--- Kenneth Brill <kbrill@multi.com> wrote:
> The code below is my first attempt at a multiple
> SELECT. Is there a better way?
>
> Thanks
> Ken Brill
> kbrill@multi.com
>
>
--------------------------------------------------------------------------------
>
>
>
> function TotalCountSongs($channel) {
> // create a temp table to fill
>
> a.. $sql = "CREATE TABLE
templistcount {TABLE
> STUFF DELETED};
> b.. $result = mysql_query($sql) or die
> ("\n\nCannot read from database\n" . mysql_errno().
> "\n" . mysql_error());
> // get the allable genres from the channels
> database, these are MP3 ID3v2 genres tags
>
> a.. $sql = "SELECT * FROM channels WHERE
> channel=\"$channel\"";
> b.. $result = mysql_query($sql) or die
> ("</select>\n\nCannot read from database\n" .
> mysql_errno(). "\n" . mysql_error());
> c.. $row = mysql_fetch_object ($result);
> // At this point $t="Rock, Country, Jazz"
> a.. $t=$row->types;
> b.. $a=explode(", ", $t);
> // Now that I have a list of genres (MP3 ID3 genre
> tags) in $a, I want to pull all the
> // songs that match those 3 genres out of the table
> 'list' and count them
> // and to do this I move them one genre at a time to
> a temp database and
> // then select them all and count that. The table
> 'list' has several thousand song titles
> // from hundreds of genres
> a.. foreach ($a as $Genres) {
> a.. $Genres=trim($Genres);
> b.. $sql = "INSERT INTO templistcount (number,
> filename, filesize, seconds, bitrate, sample,
> copyright, ID3songtitle, ID3artist, ID3album, year,
> comment , genre) SELECT number, filename, filesize,
> seconds, bitrate, sample, copyright, ID3songtitle,
> ID3artist, ID3album, year, comment, genre FROM list
> WHERE genre=\"$Genres\"";
> c.. $result = mysql_query($sql) or die
> ("</select>\n\nCannot copy from database\n" .
> mysql_errno(). "\n" . mysql_error());
> b.. }
> c.. $sql = "SELECT * FROM templistcount";
> d.. $result = mysql_query($sql) or die
> ("</select>\n\nCannot count items in database\n" .
> mysql_errno(). "\n" . mysql_error());
> e.. $num_rows = mysql_num_rows($result);
> f.. $sql = "DROP TABLE templistcount";
> g.. $result = mysql_query($sql) or die
> ("</select>\n\nCannot count items in database\n" .
> mysql_errno(). "\n" . mysql_error());
> h.. return $num_rows;
> }
>
>
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