Counting rows in a mysql query

Hey
How do i count the rows in a mysql query?
I have tried to make a while loop (as you can see in the code), but if i make this while loop i cant use the same query to get the database data.
Doesnt java have a function that counts the rows?
public DefaultTableModel searchCategory(String searchString){
        String returnString = "";
        try{
            RS = connection.executeQuery("SELECT name, price, products_type_id FROM katrinelund_products WHERE products_type_id = (SELECT products_type_id FROM katrinelund_products_type WHERE name LIKE '%"+searchString+"%')");
            int rowCount = 0;
            while(RS.next()){
                rowCount++;
            String[] columnNames = {"Navn", "Pris", "Produkt type"};
            Object[][] data = new Object[rowCount][columnNames.length];
            int i=0;
            while(RS.next()){
                data[0] = RS.getString(1);
data[i][1] = RS.getString(2);
data[i][2] = RS.getString(3);
i++;
table = new DefaultTableModel(data, columnNames);
catch(SQLException E){
System.out.println("Der skete en fejl" + E.getMessage());
return table;
}NOTE: the connection to the database is stored in the connection variable.

yawmark wrote:
The SELECT COUNT(*) cannot be fetched among other data, so in this case you must send two queries. Then there is much simplier to use the method I mentioned above.While it may be "simpler", it's not supported in a non-trivial number of drivers. So there are a number of situations in which your "simple" solution will not work. I assume you've been fortunate enough to work only with drivers that do support the functionality you recommend, but I can also only assume that you haven't had much experience beyond that.I apologize for my spelling errors. I'm not a native englishman.
yawmark wrote:
Knowing the amount of rows a resultset returns can be interesting if you're making some kind of search engine. Knowing the amount of data returned for a particular query can certainly be useful, and we've presented some reasonable means of obtaining that kind of information that don't rely on potentially unsupported features.
I don't now about unsupported features. The ResultSet is (as far as I know) not tied to a specific SQL database. This, and all of it's methods is in the java.sql.ResultSet interface. Then all classes implementing this must have these methods. Am I not right?
yawmark wrote:
Stop dealing with however it's necessary or not.Sorry, partner, but you don't get to decide what I post here.
This guy wants this problem to be solved, so apparentley he has a usage for it...And what you're apparently failing notice is that there are other solutions (better, in many cases) than the solution which you posted. Don't make the mistake of thinking your suggestion is golden. It isn't. Besides, there are no shortage of beginners that want the "problem" of i = i++ to be "solved"; no doubt they think they have an apparent usage for it, too. ~I'm well aware of that you decide on your own what to post. I just don't see how it is necessary to discuss the matter of necessity in this case. The problem still remains.
I don't want any fuss here. I'm just so sick of everyone who yells "you don't need to know that". I haven't decried any of the other solutions (at least it wasn't my point), all I said was that it's not a good idea to send multiple queries to the database when you already have the answer three rows of code away. In some rare situations, the data may have been changed during the short period of time as the database is finished with the first query before you send the next one.

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Hi All,
My requirement is to write a sql query with the following requirement
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Pasi Hmlinen (guest) wrote:
: Try
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Need help writing a MySQL query that will return only records with matching counter-parts

Since I don't know how to explain this easily, I'm using the
table below as an example.
I want to create a MySQL query that will return only records
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Notice the 'ABC / GHI' record does not have a
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AngryCloud wrote:
> Since I don't know how to explain this easily, I'm using
the table below as an
> example.
>
> I want to create a MySQL query that will return only
records that have
> matching counter-parts where 'col1' = 'ABC'.
>
> Notice the 'ABC / GHI' record does not have a
counter-matching 'GHI / ABC'
> record. This record should not be returned because there
is no matching
> counter-part. With this table, the 'ABC / GHI' record
should be the only one
> returned in the query.
>
> How can I create a query that will do this?
>
>
> id | col1 | col2
> --------------------
> 1 | ABC | DEF
> 2 | DEF | ABC
> 3 | ABC | GHI
> 4 | DEF | GHI
> 5 | GHI | DEF
>
>
> *Please let me know if you have no idea what I'm trying
to explain.
>
Please be more clear. You say that 'ABC / GHI' should not be
returned,
and then you say that 'ABC / GHI' should be the only one
returned. Can't
have both...

Retrieving the row number of a specific record from the results of a MySQL query

I want to create a MySQL query that will return a list of
records, and then retrieve the row number of a record with a
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*server-side script: PHP

<?php
$i = 0;
do {
$i++;
} while (mysql_fetch_assoc($rsWhatever) &&
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echo "TADA -" . $i;
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(assuming that ID is numeric, and that the test value
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Murray --- ICQ 71997575
Adobe Community Expert
(If you *MUST* email me, don't LAUGH when you do so!)
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"AngryCloud" <[email protected]> wrote in
message
news:g4e6ck$hrb$[email protected]..
>I will use this scenario for an example:
>
> I want to know how far down the list I will find the ID,
'57'.
>
> So I manually look at the list of results and see it is
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>
> How do I get my PHP script to get this number (25)
automatically?
>

MYSQL Query

I have a question to a MYSQL query (using PHP) in a site I
created for a
client.
I need to output the sum of one particular column in a table.
I created
an "exercise counter" for subscribers to this particular
page, which is
supposed to help them keeping track of how much exercise they
get. So
each day they add an amount, and it gets added up per week.
What i need to output is the total amount of exercise of all
users combined.
So I just made a query, and go through however many rows
there are in
the result and add those up.
But then I was thinking what if that table grows enourmously
in size.
(lets say there will be 100.000 subscribers and they each
count each week).
The calculating amount would be quite enormous.
So then I thought, hey the heck with it, i throw in another
table which
just contains the total amount and each time a user adds on
his count, i
just do that too...
Am I walking the long way or is my reasoning somewhat sound?
Anurag

Anuragbabaji wrote:
> Steve wrote:
>> On Thu, 07 Dec 2006 18:38:20 -0500, Anuragbabaji
>> <[email protected]> wrote:
>>
>>> Am I walking the long way or is my reasoning
somewhat sound?
>>
>> All you need is the SUM function:
>>
>>
http://www.tizag.com/mysqlTutorial/mysqlsum.php
>
> looks great... BUT do you think that if the table has a
zillion rows...
> do you think the two table solution would be faster...
>
> I don't want to have to go back in five years ;)
would it be sufficient and/or adviseable to simply "index"
the column?
anurag

Generate XML based on MySQL Query

Hello guys,
I need to create a XML file like this one(same structure) but based on MySQL query:
<chart>
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   <chart_data>
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         <string>2007</string>
         <string>2008</string>
         <string>2009</string>
      </row>
      <row>
         <string>Region A</string>
         <number>10</number>
         <number>30</number>
         <number>63</number>
      </row>
   </chart_data>
</chart>
I found a couple of good articles but I do not know how to get the same structure, I tried this:
<?php
header("Content-type: text/xml");
$host = "localhost";
$user = "test";
$pass = "test";
$database = "test";
$enlace = mysql_connect($host, $user, $pass) or die("Error MySQL.");
mysql_select_db($database, $enlace) or die("Error base de datos.");
$query = "SELECT AGENTE, count(*) FROM clientes group by agente";
$resultado = mysql_query($query, $enlace) or die("Sin resultados.");
$salida_xml = "<?xml version=\"1.0\"?>\n";
$salida_xml .= "<chart>\n";
$salida_xml .= "<chart_type>" . 'pie' . "</chart_type>\n";
    $salida_xml .= "<chart_data>\n";
    for($x = 0 ; $x < mysql_num_rows($resultado) ; $x++){
        $fila = mysql_fetch_assoc($resultado);
        $salida_xml .= "\t<row>\n";
        $salida_xml .= "\t\t<agente>" . $fila['AGENTE'] . "</agente>\n";
        $salida_xml .= "\t\t<cantidad>" . $fila['count(*)'] . "</cantidad>\n";
            // Corregiendo caracteres incorrectos
            $fila['texto'] = str_replace("&", "&", $fila['texto']);
            $fila['texto'] = str_replace("<", "<", $fila['texto']);
            $fila['texto'] = str_replace(">", ">", $fila['texto']);
           // $salida_xml .= "\t\t<texto>" . $fila['texto'] . "</texto>\n";
        $salida_xml .= "\t</row>\n";
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$salida_xml .= "</chart>";
echo $salida_xml;
but I'm not getting the same structure, I am getting this:
<chart>
<chart_type>pie</chart_type>
−
<chart_data>
<row>
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−
<row>
<agente>Danilo</agente>
<cantidad>8</cantidad>
</row>
<row>
    </row>
−
<row>
<agente>Evelyn</agente>
<cantidad>5</cantidad>
</row>
<row>
    </row>
−
<row>
<agente>Maribel</agente>
<cantidad>2</cantidad>
</row>
<row>
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−
<row>
<agente>Nestor</agente>
<cantidad>11</cantidad>
</row>
<row>
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−
<row>
<agente>Noemy</agente>
<cantidad>2</cantidad>
</row>
</chart_data>
</chart>
Can someone give me a hand plase?
Thanks in advance

Doing some extra research I almost get to the result that I need, I guess I am jus
t having an small problem.
Basically I need this
[PHP]
<chart>
   <chart_type>pie</chart_type>
   <chart_data>
      <row>
         <null/>
         <string>2007</string>
         <string>2008</string>
         <string>2009</string>
      </row>
      <row>
         <string>Region A</string>
         <number>10</number>
         <number>30</number>
         <number>63</number>
      </row>
   </chart_data>
</chart>
[/PHP]
Currently I have this:
[PHP]
<chart>
    <chart_type>pie</chart_type>
    <chart_data>
        <row>
            <null></null>
            <agente>Danilo</agente>
            <agente>Evelyn</agente>
            <agente>Maribel</agente>
            <agente>Nestor</agente>
            <agente>Noemy</agente>
        </row>
        <row>
            <rutas>rutas</rutas>
            <cantidad></cantidad>
            <cantidad></cantidad>
            <cantidad></cantidad>
            <cantidad></cantidad>
            <cantidad></cantidad>
        </row>
    </chart_data>
</chart>
[/PHP]
And I am using this code
[PHP]<?php
header("Content-type: text/xml");
$host = "xxx";
$user = "xxxx";
$pass = "xxxx";
$database = "xxxx";
$enlace = mysql_connect($host, $user, $pass) or die("Error MySQL.");
mysql_select_db($database, $enlace) or die("Error base de datos.");
$query = "SELECT AGENTE, count(*) FROM clientes WHERE PREVENTA LIKE 'Viernes' group by agente";
$resultado = mysql_query($query, $enlace) or die("Sin resultados.");
$salida_xml = "<?xml version=\"1.0\"?>\n";
$salida_xml .= "<chart>\n";
$salida_xml .= "\t<chart_type>" . 'pie' . "</chart_type>\n\n";
$salida_xml .= "\t<chart_data>\n";
            $salida_xml .= "\t\t<row>\n";
            $salida_xml .= "\t\t\t<null>" . $fila5['NULL']. "</null>\n";
            for($y = 0 ; $y < mysql_num_rows($resultado) ; $y++){
                $fila2 = mysql_fetch_assoc($resultado);
                $salida_xml .= "\t\t\t<agente>" . $fila2['AGENTE'] . "</agente>\n";
                }//cierro for Y
            $salida_xml .= "\t\t</row>\n";
            $salida_xml .= "\t\t<row>\n";
            $salida_xml .= "\t\t\t<rutas>" . 'rutas'. "</rutas>\n";
            for($z = 0 ; $z < mysql_num_rows($resultado) ; $z++){
                $valor = mysql_fetch_assoc($resultado);
                $salida_xml .= "\t\t\t<cantidad>" . $valor['count(*)'] . "</cantidad>\n";
            }//cierro for z
            $salida_xml .= "\t\t</row>\n";
    $salida_xml .= "\t</chart_data>\n";
$salida_xml .= "</chart>";
echo $salida_xml;
?>[/PHP]
The issue I am having is that it is not showing the quantity, in this case "cantidad", does someone know why?

Getting number of results from mysql query.

Hi,
Is there an easy way to get the number of rows (results) returned by a mysql query without looping through each result and incrementing using the rs.next()?
Statement statement = connection.createStatement();
ResultSet rs = statement.executeQuery("SELECT * FROM sometable WHERE name=\"John\"");

Have you looked at the mysql documentation at all ?
What about "SELECT count(*) FROM sometable WHERE name=\"John\"");
And if this value is going to be dynamic at all consider using a preparedStatement.
Note Haven't worked with MySql so this isn't guarenteed to work, but you get the idea. This is more of a sql question than a java question

Please help -- MySQL Query to Oracle

I have been trying to convert the following MySQL query to work with Oracle 9i. There seem to be two problems:
1) Oracle doesn't like the inclusion of the tblpackagegeneral.packageid in the "ON" clause of the "JOIN".
2) The "GROUP BY" only has the one field, "tblpackagegeneral.packageid", specified; Oracle wants the other two specified as well. When I do that I get a different data set than what MySQL returns for the same tables of data: specifically MySQL returns one row for each packageid but the revised Oracle version returns more than 1 sometimes.
I would appreciate any assistance possible.
/* Formatted on 2003/07/07 14:43 (Formatter Plus v4.8.0) */
SELECT tblpackagegeneral.packageid,
CASE
WHEN NVL
(COUNT (tblpackagelearnerassignment.learnerid),
COUNT (tbllearnergeneral.learnerid)
) > 0
THEN 'Activity'
WHEN tbllearnergeneral.subscribetopubliccourse = 'true'
AND tblpackagegeneral.packageaccess = 'Public'
THEN 'ActivityAfterSubscribe'
WHEN ( tbllearnergeneral.subscribetopubliccourse = 'false'
AND tblpackagegeneral.packageaccess = 'Public'
THEN 'Subscribe'
ELSE 'Subscribe'
END AS "ASSIGNSTATUS"
FROM tblpackagegeneral, tbllearnergeneral LEFT OUTER JOIN tblpackagelearnerassignment ON ( tblpackagelearnerassignment.packageid =
tblpackagegeneral.packageid
AND tblpackagelearnerassignment.learnerid =
tbllearnergeneral.learnerid
WHERE tbllearnergeneral.learnerid = '%var'
AND tblpackagegeneral.packageavailability = 'Available'
AND TO_CHAR (tblpackagegeneral.dateto, 'YYYYMMDD') >=
TO_CHAR (CURRENT_TIMESTAMP, 'YYYYMMDD')
GROUP BY tblpackagegeneral.packageid;
Sincerely,
Bill Robinson

I have been trying to convert the following MySQL query to work with Oracle 9i. There seem to be two problems:
1) Oracle doesn't like the inclusion of the tblpackagegeneral.packageid in the "ON" clause of the "JOIN".
2) The "GROUP BY" only has the one field, "tblpackagegeneral.packageid", specified; Oracle wants the other two specified as well. When I do that I get a different data set than what MySQL returns for the same tables of data: specifically MySQL returns one row for each packageid but the revised Oracle version returns more than 1 sometimes.
I would appreciate any assistance possible.
/* Formatted on 2003/07/07 14:43 (Formatter Plus v4.8.0) */
SELECT tblpackagegeneral.packageid,
CASE
WHEN NVL
(COUNT (tblpackagelearnerassignment.learnerid),
COUNT (tbllearnergeneral.learnerid)
) > 0
THEN 'Activity'
WHEN tbllearnergeneral.subscribetopubliccourse = 'true'
AND tblpackagegeneral.packageaccess = 'Public'
THEN 'ActivityAfterSubscribe'
WHEN ( tbllearnergeneral.subscribetopubliccourse = 'false'
AND tblpackagegeneral.packageaccess = 'Public'
THEN 'Subscribe'
ELSE 'Subscribe'
END AS "ASSIGNSTATUS"
FROM tblpackagegeneral, tbllearnergeneral LEFT OUTER JOIN tblpackagelearnerassignment ON ( tblpackagelearnerassignment.packageid =
tblpackagegeneral.packageid
AND tblpackagelearnerassignment.learnerid =
tbllearnergeneral.learnerid
WHERE tbllearnergeneral.learnerid = '%var'
AND tblpackagegeneral.packageavailability = 'Available'
AND TO_CHAR (tblpackagegeneral.dateto, 'YYYYMMDD') >=
TO_CHAR (CURRENT_TIMESTAMP, 'YYYYMMDD')
GROUP BY tblpackagegeneral.packageid;
Sincerely,
Bill Robinson

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Hi,
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SELECT tbl_tesserati.idtbl_tesserati idTesserato,
tbl_tesserati.num_tessera,
tbl_tesserati.nome,
tbl_societa.codice_meccanografico
FROM tbl_tesserati
INNER JOIN tbl_rel_tesserato_discipline_societa ON tbl_tesserati.idtbl_tesserati = tbl_rel_tesserato_discipline_societa.id_tesserato
INNER JOIN tbl_cariche ON      tbl_rel_tesserato_discipline_societa.id_carica = tbl_cariche.idtbl_cariche
INNER JOIN tbl_qualifiche ON      tbl_rel_tesserato_discipline_societa.id_qualifica = tbl_qualifiche.idtbl_qualifiche
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INNER JOIN tbl_societa ON      tbl_rel_tesserato_discipline_societa.id_societa = tbl_societa.idtbl_societa
LEFT JOIN tbl_province ON tbl_societa.provincia_sede_sociale = tbl_province.idtbl_province
LEFT JOIN tbl_comuni ON tbl_societa.comune_sede_sociale = tbl_comuni.idtbl_comuni
LEFT JOIN tbl_rel_tesserato_discipline_praticate ON tbl_rel_tesserato_discipline_praticate.tessera_id=
tbl_rel_tesserato_discipline_societa.idtbl_rel_tesserato_discipline
LEFT JOIN tbl_discipline_praticate ON tbl_discipline_praticate.idtbl_disciplina_praticate=tbl_rel_tesserato_discipline_praticate.disciplina_praticata_id
WHERE
tbl_tesserati.cognome LIKE ?
AND tbl_tesserati.nome LIKE ?
AND tbl_rel_tesserato_discipline_societa.id_societa LIKE ?
AND tbl_tesserati.idtbl_tesserati LIKE ?
AND tbl_cariche.idtbl_cariche LIKE ?
AND tbl_qualifiche.idtbl_qualifiche LIKE ?
AND tbl_tesserati.data_nascita >= ?
AND tbl_tesserati.data_nascita<= ?
AND tbl_discipline.idtbl_discipline LIKE ?
AND codice_affiliazione LIKE ?
AND tbl_societa.denominazione LIKE ?
AND YEAR(tbl_rel_tesserato_discipline_societa.data_scadenza) LIKE ?
AND (tbl_province.nome LIKE ? OR tbl_province.nome IS NULL)
AND ( tbl_comuni.nome LIKE ? OR tbl_comuni.nome IS NULL)
The tbl_tesserati.data_nascita is a mysql date field.
The click event handler code for the "Details" Button is:
public String btnModificaTesserato_action() {
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            getRequestBean1().setId_tesserato((Long)rowData.getValue("idTesserato"));
        } catch(Exception ex) {
            log("errore nella query",ex);
        return "dettaglioTesseratoSocieta";
    }When i run the project and open the page the table is correctly rendered and populated with some rows. But when i click on details button nothing happens, the page is simply reloaded.
If i set a breakpoint in the code line TableRowDataProvider rowData= (TableRowDataProvider)getBean("currentRowTesserati");the debbuger does not stop the code execution ! As if the button was never clicked!
I tried to modify the source query to :
SELECT tbl_tesserati.idtbl_tesserati idTesserato,
tbl_tesserati.num_tessera,
tbl_tesserati.nome,
tbl_societa.codice_meccanografico
FROM tbl_tesserati
INNER JOIN tbl_rel_tesserato_discipline_societa ON tbl_tesserati.idtbl_tesserati = tbl_rel_tesserato_discipline_societa.id_tesserato
INNER JOIN tbl_cariche ON      tbl_rel_tesserato_discipline_societa.id_carica = tbl_cariche.idtbl_cariche
INNER JOIN tbl_qualifiche ON      tbl_rel_tesserato_discipline_societa.id_qualifica = tbl_qualifiche.idtbl_qualifiche
INNER JOIN tbl_discipline ON      tbl_rel_tesserato_discipline_societa.id_disciplina = tbl_discipline.idtbl_discipline
INNER JOIN tbl_societa ON      tbl_rel_tesserato_discipline_societa.id_societa = tbl_societa.idtbl_societa
LEFT JOIN tbl_province ON tbl_societa.provincia_sede_sociale = tbl_province.idtbl_province
LEFT JOIN tbl_comuni ON tbl_societa.comune_sede_sociale = tbl_comuni.idtbl_comuni
LEFT JOIN tbl_rel_tesserato_discipline_praticate ON tbl_rel_tesserato_discipline_praticate.tessera_id=
tbl_rel_tesserato_discipline_societa.idtbl_rel_tesserato_discipline
LEFT JOIN tbl_discipline_praticate ON tbl_discipline_praticate.idtbl_disciplina_praticate=tbl_rel_tesserato_discipline_praticate.disciplina_praticata_id
WHERE
tbl_tesserati.cognome LIKE ?
AND tbl_tesserati.nome LIKE ?
AND tbl_rel_tesserato_discipline_societa.id_societa LIKE ?
AND tbl_tesserati.idtbl_tesserati LIKE ?
AND tbl_cariche.idtbl_cariche LIKE ?
AND tbl_qualifiche.idtbl_qualifiche LIKE ?
AND tbl_tesserati.data_nascita >= ?
OR tbl_tesserati.data_nascita<= ?
AND tbl_discipline.idtbl_discipline LIKE ?
AND codice_affiliazione LIKE ?
AND tbl_societa.denominazione LIKE ?
AND YEAR(tbl_rel_tesserato_discipline_societa.data_scadenza) LIKE ?
AND (tbl_province.nome LIKE ? OR tbl_province.nome IS NULL)
AND ( tbl_comuni.nome LIKE ? OR tbl_comuni.nome IS NULL)
Using this query everything works well !! The click handler works and the debugger too !!
I changed only the AND in OR !!!
I also tried to change mysql-x-x-connector driver but without solving my problem.
Can someone help me ?
Thanks
Giorgio

You'll find that it is more to do with the way MySql deals with dates than anything else! Depending on how your date field is setup, then try using a BETWEEN statement for those 2 lines in your first query e.g.
AND ( tbl_tesserati.data_nascita BETWEEN ? AND ?)
The date column needs to be in the ISO format to work. If you examine your second query output, you might discover that the output is only going to refer to one parameter (probably the OR one). Did you manage to view the output logs from the application server? You would have got an idea from there with a message like stating a conversion error'.
Alternatively, you could try using the to_days() function and convert it directly to a number which would be a lot easier to deal with. For example:
AND to_days(tbl_tesserati.data_nascita >= ? )
AND to_days( tbl_tesserati.data_nascita<= ? )
Or try the BETWEEN version with to_days() and see what you get.
More info about date formatting (v5) here:
http://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html#function_to-days
Before I forget, sometimes you may need to treat dates as Strings rather 'Long' as you did.
As a matter of interest, did you try your query in a different piece of software?
If my queries are a little more complicated, I tend to try MySql queries out in the free MySql query browser and also double check in another to verify certain issues. I found it easier to develop SQL in a seperate program then import the final version to JSC making the required modifications for parameters.
Message was edited by:
aerostra

How to get number of rows return in SELECT query

i'm very new in java, i have a question:
- How to get number of rows return in SELECT query?
(i use SQL Server 2000 Driver for JDBC and everything are done, i only want to know problems above)
Thanks.

make the result set scroll insensitve, do rs.last(), get the row num, and call rs.beforeFirst(), then you can process the result set like you currently do.
         String sql = "select * from testing";
         PreparedStatement ps =
          con.prepareStatement(sql,ResultSet.TYPE_SCROLL_INSENSITIVE,ResultSet.CONCUR_READ_ONLY);
         ResultSet rs = ps.executeQuery();
         rs.last();
         System.out.println("Row count = " + rs.getRow());
         rs.beforeFirst();~Tim
NOTE: Ugly, but does the trick.

Help with mysql query plz anyone i am begging!!!

Hi everyone pls forgive me i am new to java. can someone pls tel me where i am going wrong wit this mysql query?
<sql:query var="parish" maxRows="1" dataSource="jdbc/gav">
SELECT ParishName, OwnerOccupierHousehold, OwnerOccupierPercOfOverall, OwnerOccupierCo2Emissions,
SocialRentedHousehold, SocialRentedPercOfOverall, SocialRentedCo2Emissions, PrivateRentedHousehold,
PrivateRentedPercOfOverall, PrivateRentedCo2Emission, TotalHouseholds, TotalPerc, Average,
Total2001, TotalEstimatedTotal2006, EmissionsPerPerson, EmissionPerHousehold, EmissionsPerParish,
EnergyChampionsNeeded, NumberOfPeopleAtWork, NumberOfSchoolAgeChildren
FROM base_data as b
WHERE b.id = ? <sql:param value="${param.id}"/>
<sql:param value="${param.id}"/>
</sql:query>
<c:set var="parish" scope="request" value="${parish.rows[0]}"/>
here is the error i get:
java.sql.SQLException: Parameter index out of range (2 > number of parameters, which is 1).
please any help would be appreciated!!! Thanks in advance guys .

here is my code for the form on the index page:
<%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<%@taglib uri="http://java.sun.com/jsp/jstl/sql" prefix="sql"%>
<sql:query var="parish" dataSource="jdbc/gav">
SELECT id, ParishName FROM base_data
</sql:query>
<form action="response.jsp">
Select a Parish: <select name="id">
<c:forEach var="parish" items="${parish.rows}">
<option value="${parish.id}">${parish.ParishName}</option>
</c:forEach>
</select><br><input type="submit" value="submit" name="submit" /></form>
here is the code for the response page:
<%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<%@taglib uri="http://java.sun.com/jsp/jstl/sql" prefix="sql"%>
<sql:query var="parish" maxRows="1" dataSource="jdbc/gav">
SELECT b.id, b.ParishName, b.OwnerOccupierHousehold, b.OwnerOccupierPercOfOverall, b.OwnerOccupierCo2Emissions,
b.SocialRentedHousehold, b.SocialRentedPercOfOverall, b.SocialRentedCo2Emissions, b.PrivateRentedHousehold,
b.PrivateRentedPercOfOverall, b.PrivateRentedCo2Emission, b.TotalHouseholds, b.TotalPerc, b.Average,
b.Total2001, b.TotalEstimatedTotal2006, b.EmissionsPerPerson, b.EmissionPerHousehold, b.EmissionsPerParish,
b.EnergyChampionsNeeded, b.NumberOfPeopleAtWork, b.NumberOfSchoolAgeChildren
FROM base_data as b
WHERE b.id = ? <sql:param value="${param.id}"/>
</sql:query>
<c:set var="parish" scope="request" value="${parish.rows[0]}"/>
i display the results like this : ${parish.EmissionsPerParish}
the user should be able to select a parish from a form and then sql query created and then i want to show the row results on the response page.
could you tell me where so should be a simple process although not simple enough as it may seem.
thanks for the advice keith

Mysql Query VS Vector Object

I run mysql query using Java, and the results of it are put in a vector object. Due to the vector object is made by 1 element (it's sure because I wrote the database) I'd like to take it and put it in a string variable, but Java returns me a lot of exceptions; here is the code:
public Vector eseguiQuery(String query) {
     Vector v = null;
     String [] record;
     int colonne = 0;
     try {
        Statement stmt = db.createStatement();     // Creo lo Statement per l'esecuzione della query
        ResultSet rs = stmt.executeQuery(query);   // Ottengo il ResultSet dell'esecuzione della query
        v = new Vector();
        ResultSetMetaData rsmd = rs.getMetaData();
        colonne = rsmd.getColumnCount();
        while(rs.next()) {   // Creo il vettore risultato scorrendo tutto il ResultSet
           record = new String[colonne];
           for (int i=0; i<colonne; i++) record[i] = rs.getString(i+1);
           v.add( (String[]) record.clone() );
        rs.close();     // Chiudo il ResultSet
        stmt.close();   // Chiudo lo Statement
     } catch (Exception e) { e.printStackTrace(); errore = e.getMessage(); }
     return v;
public String autentica(String query){
          String s = (String) db.eseguiQuery(query).get(0);
          System.out.println(s);
          return s;
     }...Please help me!

1. You're not calling ResultSet.next() to move the result set onto the first row of results.
2. (Edit) Deleted because you were in fact closing your objects, though you should still use a finally block to make absolutely certain.
3. The exceptions tell you what the problem is - when you post a question please include these.
Edited by: dcminter on 06-Aug-2008 17:04

Number of rows returned in a query

Is there a way to get the number of rows returned from a query without itterating through the itterator?
Thanks,
Yon

No.
Because rows are not all returned until you start interating.
Some times I have seen people do a count query before the normal query, this helps out if you need a count to set things up.

Counting rows in a mysql query

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