How to count mysql with using group by PHP ?
When i test this code it's echo 1
How to do for echo 3 (by count country)?
This is my table_test
_____________________
|__id___|__country__|
|__1____|____usa____|
|__2____|____usa____|
|__3____|___china___|
|__4____|____uk_____|
This is my code.
<?PHP
$result = mysql_query("SELECT COUNT(*) FROM table_test GROUP BY country");
$row = mysql_fetch_row($result);
mysql_free_result($result);
$all_country = $row[0];
echo $all_country;
?>
Try:
SELECT Country,COUNT(*) FROM table_test GROUP BY country
1) Use mysqli_* API instead of mysql_* API
2) Use mysqli_num_rows to get total row returned
$sql="SELECT COUNT(*) FROM table_test GROUP BY country";
if ($result=mysqli_query($con,$sql))
{
$rowcount=mysqli_num_rows($result);
}
echo $rowcount; // print 3
use this code for counting rows of selected query
<?php
$result = mysql_query("SELECT COUNT(*) FROM table_test GROUP BY country");
$row = mysql_fetch_row($result);
$all_country = mysql_num_rows($result);
echo $all_country;
?>
Related
Been at this awhile...this is actually another simplified question to a problem I posted earlier. I'm trying to display the country and count for the following query:
$query = mysqli_query($con, "SELECT COUNT(id), country FROM users GROUP BY country ORDER BY COUNT(id) DESC");
while ($row = mysqli_fetch_array($query)) {
$countries = $row['country'];
echo $countries;}
What I'm getting in output is the countries listed from highest to lowest, but it does not have the count displayed next to it. I know these have been summed in the query, how do I target the number & assign it to a php variable for display?
Any help would be appreciated.
You can use an alias for your COUNT column and then reference that in the array returned by mysqli_fetch_array for each row.
$query = mysqli_query($con, "SELECT COUNT(id) AS countryCount, country FROM users GROUP BY countryCount ORDER BY countryCount DESC");
while ($row = mysqli_fetch_array($query)) {
$count = $row['countryCount'];
$countries = $row['country'];
echo $count;
echo $countries;}
You need to add alias in query for COUNT(id) like below:-
$query = mysqli_query($con, "SELECT COUNT(id) as count, country FROM users GROUP BY country ORDER BY count DESC");
Now change while() loop code a bit:-
while ($row = mysqli_fetch_assoc($query)) { // _assoc for lighter array iteration
$countries = $row['country'];
$countries_count = $row['count'];// get count of each country
echo $countries.'--'.$countries_count ;// show country and it's count both
}
Is this what you are trying to do:-
$query = mysqli_query($con, "SELECT COUNT(id) AS total_country, country FROM users GROUP BY country ORDER BY id DESC");
while ( $row = mysqli_fetch_array( $query ) )
{
$countries = $row['country'];
$total_countries = $row['total_country'];
echo "<p>{$countries}</p>;
echo "<p>Total count: {$total_countries}</p>";
}
You're not assigning the variable.
Do this: $count = $row['COUNT']; and echo it. It should work
Why isnt this working?
mysql_select_db('a2943462_Pages');
$num_rows = mysql_query("SELECT COUNT(*) FROM PagesInfo");
echo $num_rows;
mysql_query("INSERT INTO `a2943462_Pages`.`PagesInfo`(`ID`, `Title`, `Video`, `Posted`) VALUES ('".$num_rows."', '".$Title."', '".$Embed."', '".$name."')");
printf("Last inserted record has id %d\n", mysql_insert_id());
Because it now echoes:
Resource id #9
but i tought it would echo 4 instead because i have 3 rows inside the Table
Change this:
$num_rows = mysql_query("SELECT COUNT(*) FROM PagesInfo");
To this:
$num_rows = mysql_result(mysql_query("SELECT COUNT(*) FROM PagesInfo"), 0);
This is the PHP method:
$sql="SELECT * FROM pages_info";
$result = mysql_query($sql, $con) or die (echo "$sql" );
$rows = mysql_num_rows($result);
you should do two queries:
first query what you want to show:
SELECT SQL_CALC_FOUND_ROWS * FROM PagesInfo
and second query to get number rows returned:
SELECT FOUND_ROWS()
The in your insert the number of rows returned
The query in php is
$rows = mysql_query("SELECT SQL_CALC_FOUND_ROWS * FROM PagesInfo");
$rs = mysql_query("SELECT FOUND_ROWS()");
$r = mysql_fetch_row($rs);
mysql_free_result($rs);
$row_num = $r[0];
How do I get the outcome of
SELECT COUNT(user) FROM game_paths WHERE user = '$user'
to a PHP variable
I tried
mysql_num_rows
but it returns nothing.
You should use mysql_result and get the first column of the result. Like this:
$result = mysql_query("SELECT COUNT(user) FROM game_paths WHERE user='$user'");
$count = mysql_result($result, 0);
You can also alias the column like this:
$result = mysql_query("SELECT COUNT(user) AS total FROM game_paths WHERE user='$user'");
$data = mysql_fetch_assoc($result);
$count = $data['total'];
Which might be better if you're going to select several columns at the same time, and also for readability.
Try like this. you need to use mysql_fetch_assoc or mysql_fetch_array functions
$result = mysql_query(" SELECT COUNT(user) as total FROM game_paths WHERE user='$user' ");
$row = mysql_fetch_assoc($result);
echo $row['total'];
Or
$result = mysql_query(" SELECT COUNT(user) FROM game_paths WHERE user='$user' ");
$row = mysql_fetch_array($result);
echo $row[0];
Docs Link: http://us2.php.net/mysql_fetch_array
http://www.w3schools.com/php/func_mysql_fetch_array.asp
Note: mysql_* function are deprecated try to use mysqli or PDO
You can use the following code:
$result = mysql_query(" SELECT COUNT(user) FROM game_paths WHERE user='$user' ");
$row = mysql_fetch_array($result);
$count= $row[0];
or
$result = mysql_query("SELECT * FROM game_paths WHERE user='$user'");
$count=mysql_num_rows($result);
This will return the number of rows satisying the condition.
Hey friend Try this code, ithink this will solve your problem
<?php
$con=mysql_connect('hostname','DBusername','paassword');
mysql_select_db('Db_name',$conn);
$query="SELECT COUNT(user) as total FROM game_paths WHERE user='$user'";
$result=mysql_query($query,$con);
$row=mysql_fetch_array($result);
echo $row['total'];
?>
$result = mysqli_query("SELECT COUNT(user) AS user_count FROM game_paths WHERE user='$user'");
$result_array = mysql_fetch_assoc($result);
$user_count=$result_array['user_count'];
Please use mysqli_ instead of mysql_ as its deprecated in the new version
i need to select one row where slot_left is the biggest. i tried
for ( $i=1;$i<3;$i++) {
$sql5 = "SELECT * from user u where (
select max(slot_left) from company c,user u
where c.id=u.company_id and c.id='$name'
)";
$result5 = mysqli_query($link, $sql5) or die(mysqli_error($link));
while($row=mysqli_fetch_array($result5)) {
// echo the id which the slot_left is the biggest
echo $i['slot_left'];
}
}
but still cannot. please help!
You have to use GROUP BY in your query.
And query execution in Loop is not recommended, it will decrees performance.
Try this.
$sql5 = "select c.id, max(slot_left) from company c,user u
where c.id=u.company_id and c.id='$id' GROUP by c.id";
$result5 = mysqli_query($link, $sql5) or die(mysqli_error($link));
while($row=mysqli_fetch_array($result5)) {
echo $row['slot_left'];
}
SQL can be. You select all rows from DB.
$sql5 = "select max(slot_left) AS slot_left from company c,user u where c.id=u.company_id and c.id='$name' GROUP by u.company_id";
$name variable used in query not set
Variable $i is not array. Array is $row
echo $row['slot_left'];
This question already has answers here:
SELECT COUNT(*) AS count - How to use this count
(5 answers)
Closed 1 year ago.
$query = "select count(*)
from relationships
where leader = 'user_id'";
$result = mysql_query($query);
how can i display the count? thanks
$count = mysql_fetch_array($result);
echo $count[0];
$query = "SELECT COUNT(*) AS total FROM table";
$result = mysql_query($query);
$values = mysql_fetch_assoc($result);
$num_rows = $values['total'];
echo $num_rows;
use $row = mysql_fetch_array($result) and access it by index 0: $row[0]
use an alias in your query ("select count(*) as cnt from ...") and $row = mysql_fetch_assoc($result) and access it by name: $row['cnt']
$abc="SELECT count(*) as c FROM output WHERE question1=4";
$result=mysqli_query($conn,$abc);
if($result)
{
while($row=mysqli_fetch_assoc($result))
{
echo $row['c'];
}
}
Its work completely in this it count the number of occurrences of 4 in the column