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recordset default to last record

Thread began 4/17/2014 12:18 am by Christopher West | Last modified 4/17/2014 11:20 am by Jason Byrnes | 261 views | 5 replies |

Christopher WestCommunity Expert

recordset default to last record

Hello, I have a recordset which defaults to record 1 on first page load. However, how can I edit the below recordset so that it defaults to the last record in the database (the idea is so that the page will display the very latest blog entry and elsewhere on the same page a blog navigation so that why this recordset has a GET['BlogID'].

php:
$colname_rsBlog = "1";

if (isset($_GET['BlogID'])) {
  $colname_rsBlog = $_GET['BlogID'];
}
mysql_select_db($database_harropsdb, $harropsdb);
$query_rsBlog = sprintf("SELECT * FROM blog WHERE BlogID = %s", GetSQLValueString($colname_rsBlog, "int"));
$rsBlog = mysql_query($query_rsBlog, $harropsdb) or die(mysql_error());
$row_rsBlog = mysql_fetch_assoc($rsBlog);
$totalRows_rsBlog = mysql_num_rows($rsBlog);





Chris

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Jason ByrnesWebAssist

add an order by clause to order by the ID column in DESC order, that will cause the lat record in the table to be the first one returned:

ORDER BY BlogID DESC

the order by goes after the where clause.

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Christopher WestCommunity Expert

Hi Justin, I had already thought of that but it wont work.


here the adjust code with the ORDER BY that you suggested:

$colname_rsBlog = "-1";
if (isset($_GET['BlogID'])) {
$colname_rsBlog = $_GET['BlogID'];
}
mysql_select_db($database_harropsdb, $harropsdb);
$query_rsBlog = sprintf("SELECT * FROM blog WHERE BlogID = %s ORDER BY BlogID DESC", GetSQLValueString($colname_rsBlog, "int"));
$rsBlog = mysql_query($query_rsBlog, $harropsdb) or die(mysql_error());
$row_rsBlog = mysql_fetch_assoc($rsBlog);
$totalRows_rsBlog = mysql_num_rows($rsBlog);



The part I need to figure out it this code in the adove

$colname_rsBlog = "-1";



Since the -1 will return no records if there is not a URL variable being passed in I need to adjust the -1 so that it will return the last record in the database table. (obviously it works if I manually enter in the last record rather than using -1

when the user first goes to that page there would be no URL parameters (our-thoughts.php)

but on this page when the user selects from the right side navigation it will reenter this page with something like "our-thoughts.php?BlogID=15"

I hope this explains my situation further :)

The only way I can think of is to create some php code before creating the recordset and assigning a variable to the last record in the database using something like MAX

and then replacing the -1 in

$colname_rsBlog = "-1";

with something like

$colname_rsBlog = "MyVariableStoringLastRecord";



Chris

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Jason ByrnesWebAssist

Ok, I understand now.

you need to use advanced view to edit the recordset.

in advanced view the recordset will look like this:

SELECT * FROM blog WHERE BlogID = colname ORDER BY BlogID DESC

and in the variables section will be the colname variable as:

Name: colname
type: integer
Default Value: -1
runtime Value: $_GET['BlogID']


edit the recordset to:

SELECT * FROM blog WHERE (BlogID = colname) OR (colname2 = -1) ORDER BY BlogID DESC

and create another variable as:
Name: colname2
type: integer
Default Value: -1
runtime Value: $_GET['BlogID']

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Christopher WestCommunity Expert

Well that certainly did the trick! Thank you kindly Jason for fast response. You are a legend :)

and sorry earlier in my previous reply I called you Justin :-/
Chris

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Jason ByrnesWebAssist

you're welcome, and no worries.

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