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PHP - Counting Select Distincts
Hi,
I have a database with roughly 73k rows (records). I am using a query string such as: SELECT DISTINCT Column FROM databasename I am then using mysql_num_rows($results) to count the number of distinct rows. This method works, but it is slow. Is there a faster way of doing this perhaps internal to the mysql without having to send the entire results to the PHP when I only need a count? Similar TutorialsI'm creating a login that uses PDO statements, however when I try to count how many rows was selected, it gives me an error mentioning its an unidentified property, I always tried rowCount, but it did not work either... Notice: Undefined property: PDOStatement::$num_rows in /Users/JPFoster/Sites/Jaipai.Blog/engine.php on line 50 Here's my class method: Code: [Select] public function login($user, $pw){ $user = addslashes($this->user); $pw = md5($pw); $query = "SELECT * FROM `users` WHERE `username` = '".$user."' AND `password` = '".$pw."'"; //set up query $results = $this->pdo->query($query); if ($results->num_rows == 1){ $row = $results->fetch_assoc(); echo "Worked!"; //$this->set_session($row['id'], $row['username'], $row['email']); } else { echo "Your Username and Password did not match"; } //if user + passs match { redirect (member page) and set up sessions // Else ... Retry... } Any help with this will be greatly appreciated! Hey there. Not sure how to word this. I've been flying blind as a newbie trying to figure out some pagination for a left joined query. I've got syntax errors trying to set up the SELECT COUNT function that adds up the results of the search on a previous page so it knows how many results matched both tables. Right now, I've got this mess, and it's giving me a syntax error, "You have an error in your SQL syntax; .... near 'LEFT JOIN plantae ON (descriptors.plant_id = plantae.pla' at line 12" Code: [Select] $data = "Select (SELECT COUNT(*) FROM descriptors ) AS count1, (SELECT COUNT(*) FROM plantae ) AS count2 LEFT JOIN plantae ON (descriptors.plant_id = plantae.plant_name) WHERE `leaf_shape` LIKE '%$select1%' AND `leaf_venation` LIKE '%$select3%' AND `leaf_margin` LIKE '%$select4%'"; $result = mysql_query ($data); if (!$result) { die("Oops, my query failed. The query is: <br>$data<br>The error is:<br>".mysql_error()); } I have a table in my database named order, and i want to count the quantity sold. i have the basic query already setup like: Code: [Select] $sql = "SELECT SQL_CALC_FOUND_ROWS deal.id, deal.title, deal.min_qty, deal.start_date, deal.end_date, deal.status, deal.secondary, count(o.id) as orders_cnt FROM deals as deal LEFT JOIN orders as o on o.d_id = deal.id WHERE start_date >= '".$beg."' AND start_date <= '".$end."' GROUP BY o.d_id, deal.id ORDER BY start_date LIMIT ".AwsPager::getCurrentIndex().", ".AwsPager::getLimit(); Which would theoretically work, but in the orders table, there is a column named quantity, and its those numbers that i need to add together and store in the array as orders_cnt.. any clue how i can do that? Hi im trying to make it so the time says how many hows left, not how many hours past. i have the right idea but it shows a negative number under "$time" $hours = number_format(($diffrence / 60 / 60)); $time = number_format(($hours - 24)); One more question to ask. I'm trying to do a count of total logins that have happened in the last 5 months including the current one so far. My users_logins table has the following structu users_id, session_id, login_date(datetime), last_activity(datetime). What the end result is going to be is: <tr> <td></td> <th scope="col"><?php echo date("M", strtotime("-4 month")); ?></th> <th scope="col"><?php echo date("M", strtotime("-3 month")); ?></th> <th scope="col"><?php echo date("M", strtotime("-2 month")); ?></th> <th scope="col"><?php echo date("M", strtotime("-1 month")); ?></th> <th scope="col"><?php echo date("M"); ?></th> </tr> <tr> <th scope="row">Logins</th> <td>94</td> <td>53</td> <td>124</td> <td>92</td> <td>105</td> </tr> Where the first td would be May and the last td would be September. Do I have to do this in 4 separate queries. If so here's what I have for the first query. I'm not sure what woudl go for the WHERE. $four_months_ago_query = "SELCT COUNT(date_login) FROM users_logins WHERE ? "; I am getting the result I expected with ORDER BY/GROUP BY queries WITH a troubling EXCEPTION: the data is being IN ORDER from 0 thru 9, but 10 (which in this test sample is my LARGEST quantity) is being inserted between the ONE and 2 quantity. Not sure if this will occur with ALL teen values, as well as hundreds. The column is a SMALLINT field (not sure if that makes a difference)> Is there a solution for this situation? Hello I have a table that inserts a new row with data when a member views a page. I wish to count all the rows for each member, and then be able to show what the cuurent members "position" is eg. what members has the highest row count. Example. counting the rows for member_A returns 1000 rows, the number of rows for member_B returns 1500 rows. How can I display for member_A that he is in "second" place? I'm trying to get a total number from the db where the month is the same and the ip is different. This is a stats script that someone else wrote, and I'm just trying to get a month-to-month total. Right now, it pulls the information out and displays the month with how many different ips came that month, the problem is, it lists like this: June - 41 - 41 June - 1 - 1 June - 1 - 1 June - 1 - 1 June - 1 - 1 June - 1 - 1 June - 9 - 9 June - 2 - 2 June - 2 - 2 June - 2 - 2 June - 1 - 1 June - 3 - 3 June - 2 - 2 June - 4 - 4 June - 1 - 1 June - 13 - 13 June - 154 - 154 what I need to do is grab all those numbers and give a total for that month, in this case, June. This is my query Code: [Select] $query = "SELECT date, COUNT(referrer)'referrer' FROM app_analytics WHERE appid = $userid AND date BETWEEN '" .$y_month . "' AND '" . $t_month . "' GROUP BY referrer ORDER BY date"; Can anybody help out? Thanks in advance I have an array. When I print it it looks like this: Quote Array ( [1] => Array ( [Cushion] => Cushion 1 [Fabric] => f-111111 [FabricPrice] => 0 [Fill] => Fiber [Button] => none [ContWelt] => none [ContWeltFabric] => none [Zipper] => N [Quantity] => 2 [WeltSize] => [SKU] => c-111111 [Edge] => Knife [Cap] => N [Straps] => N [Hinged] => N [Type] => Boxed Button [Price] => 54.25 [Total] => 108.5 ) [2] => Array ( [Cushion] => Cushion 1 [Fabric] => f-111111 [FabricPrice] => 0 [Fill] => Fiber [Button] => none [ContWelt] => none [ContWeltFabric] => none [Zipper] => N [Quantity] => 4 [WeltSize] => [SKU] => c-111111 [Edge] => Knife [Cap] => N [Straps] => N [Hinged] => N [Type] => Boxed Button [Price] => 54.25 [Total] => 217 ) ) Now when I use count() I get a result of 01 when I should get 02 when I use count( ,1) I get a result of 381. I am Using this wrong? the array is stored in $_SESSION['cushArray'] Hiya peeps, I have a mysql database with a record of all the images a customer uploads on my site, these images are displayed on there account. I can get this to work but the problem I'm facing is I need a minimum of 5 images displayed so if they only upload 2 images for instance I need to detect that and add my "No Image Uploaded" image. But if they have uploaded 5 or more I need to just let them be displayed without adding the "No Image Uploaded" picture. Does anyone have any ideas as I'm very stuck! Many thanks James. I know how to count the files: <?php $dir = $_SERVER[DOCUMENT_ROOT]."/api/sigs/cache/".$i[id]."/"; $files = scandir($dir); $result = count($files); printf("$result Signatures Generated"); ?> But i'm trying to make it so it only counts the files that were modified recently (That Day).
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else if(empty($password)){
$errorMsg[]="please enter password";
}
else
{
try
{
$select_stmt=$db->prepare("SELECT * FROM tbl_user WHERE username=:uname OR email=:uemail");
$select_stmt->execute(array(':uname'=>$username, ':uemail'=>$email));
$row=$select_stmt->fetch(PDO::FETCH_ASSOC);
if($select_stmt->rowCount() > 0)
{
if($username==$row["username"] OR $email==$row["email"])
{
if(password_verify($password, $row["password"]))
{
$_SESSION["user_login"] = $row["user_id"];
//----------------
$pdo_statement=$db->prepare("update tbl_user set logins=7 where user_id=2");
$result = $pdo_statement->execute();
//----------------
$loginMsg = "Successfully Login...";
header("refresh:2; welcome.php");
}
else
hey guys iam starting to learn during this crysis php :-). I got stucked with this pdo style..... i like to count logins, i tryed and figured out i can use the id... but my question is how can replace this "where user_id=2" to get the specific ID for the current user login in? the count function i i know how to make the... first i want to know how to write the syntax of this pdo...... thank you :-) I have a page that displays a list of retail locations (est. 100-150 locations). I have my layout setup to fit 3 columns side by side. Ex: <div class="col"></div> <div class="col"></div> <div class="col"></div> .. with the "col" class having a specific width and float: left. Basically, I want to print out the locations in the column and when a column reaches a certain number of locations, it closes that div and starts a new one and continues printing the rest of the locations. How would I go about making sure that once a column has reached a certain number of locations, it closes the div and starts the new one? ok my code is below but i want to count how many $sname or ['member_name'] there is as if there is 4 or more i want it to add a marquee to it have that sorted but im having trouble getting it to count can you help me? $query = "SELECT * FROM `ibf_members` WHERE member_group_id = '4' or member_group_id = '6' or member_group_id = '17' or member_group_id = '18' or mgroup_others = '4' or mgroup_others = '6' or mgroup_others = '17' or mgroup_others = '18' "; $result99 = mysql_db_query("pbf99_backup", $query); $staff1 = mysql_num_rows($result99); if ($result99) { while ($r = mysql_fetch_array($result99)) { // Begin while $sid = $r["member_id"]; $smgid = $r["member_group_id"]; $query2 = "SELECT * FROM `ibf_sessions` WHERE member_id = '$sid'"; $result2 = mysql_db_query("pbf99_backup", $query2); if ($result2) { while ($r2 = mysql_fetch_array($result2)) { // Begin while $sname = $r2["member_name"]; $query3 = "SELECT * FROM `ibf_groups` where g_id = '$smgid'"; $result3 = mysql_db_query("pbf99_backup", $query3); if ($result3) { while ($r3 = mysql_fetch_array($result3)) { // Begin while $ssuffix = $r3["suffix"]; $sprefix = $r3["prefix"]; echo "<a href='$host$sid' target='_parent'>$sprefix$sname$ssuffix$stafff</a><br><br>"; }}}}}} ?> Hello, I'm creating a program that analyzes information that is exported by another program. That program exports it in this way: Value1 Value2 Value3 Value4 Value1 Value2... In order to insert them in the database, I first have to know how many lines are inserted. They get send through HTML post. I already tried: $lines = explode("\n", $string); $number_lines = count($lines); But this always results in 1. How do I fix this? Regards, Chris I can't seem to find a decent code function to search for "curse" words that i would deem inappropriate in an array. Count the number of instances the function finds a curse word and then if the number is greater than one halt the script. something like the following but not really.... Code: [Select] $words = array('ass','fuck','shit'); $string = 'Blah blah blah ass blah blah fuck blah blah shit!'; //code to count the instances of the curse words(3) if($instances > 0) { echo "no cursing please."; } ; any help on how to do this would be much appreciated! Hi everyone. I need to display a list of departments and a total of occurrences of each department in mysql/php. eg. There are 3 Administration types. There are 5 Government types. etc. there is no error when i run the code below, but nothing displays happens either. i'd appreciate anyone's help. Thanks. Code: [Select] <?php $query = mysql_query("SELECT CompanyName, CompanyBranch, DateRecorded, DateClosed, Year(DateRecorded) AS Year, CaseOwner.UsersDepartment FROM records LEFT JOIN CaseOwner ON CaseOwner = CaseOwner.ProperName GROUP BY CompanyName, CompanyBranch, DateRecorded, DateClosed, CaseOwner.UsersDepartment ORDER BY CaseOwner.UsersDepartment") or die("SELECT Error: ".mysql_error()); $result = mysql_query($query) or die(mysql_error()); while($row = mysql_fetch_array($result)){ echo "There are ". $row['COUNT(CaseOwner.UsersDepartment)'] ." ". $row['CaseOwner.UsersDepartment'] ." types."; echo "<br />"; } ?> Hi I'm using php file to retrieve the amount of records in my database, but all of a sudden I get 0 results. It worked fine a few days ago. I got PHP 5.2.* on my host. Here is the current script that I use.
Did I made a mistake somewhere?
<?php
$con=mysqli_connect("******","*****","*****","****");
// Check connection
if (mysqli_connect_errno()) {
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}
$sql="SELECT * FROM mxit";
if ($result=mysqli_query($con,$sql))
{
$rowcount=mysqli_num_rows($result);
//printf("Result set has %d rows.\n",$rowcount);
// Free result set
mysqli_free_result($result);
}
mysqli_close($con);
?>
Hi all What I am trying to achieve is a for each loop for the following output Code: [Select] Array ( [result] => success [source] => getDirectory [success] => Array ( [0] => /root/mc/world/data/ [1] => /root/mc/world/level.dat [2] => /root/mc/world/level.dat_old [3] => /root/mc/world/players/ [4] => /root/mc/world/players/herghost.dat [5] => /root/mc/world/region/ [6] => /root/mc/world/region/r.-1.0.mcr [7] => /root/mc/world/region/r.0.0.mcr [8] => /root/mc/world/session.lock [9] => /root/mc/world/uid.dat ) ) How would I go about saving each path from the [success] output? Basically I wish to loop through the array and delete the files. Many Thanks I have a table with "votes" column. I basically want to retrieve the sum of all the votes columns associated with a user. This is the full code. It gives me "NULL" output.
$count_votes = $db->prepare("SELECT SUM(votes) as total FROM entries WHERE user_id = :user_id");
$count_votes->bindParam(':user_id', $user_id);
$count_votes->execute();
$t_votes = $count_votes->fetchColumn();
$get_votes = $t_votes['total'];
echo $get_votes;
But if I remove the user_id bind paramter, it gives me the results. But I need that parameter to show which user has how many votes.
$count_votes = $db->prepare("SELECT SUM(votes) as total FROM entries");
$count_votes->execute();
$t_votes = $count_votes->fetchColumn();
$get_votes = $t_votes['total'];
echo $get_votes;
What am I doing wrong? |
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