I wonder... is this possible to select a random row in my DB where only the record that contains field->Status = 0 ? because i only need a row that contains 0 in the field name=Status. if the status contains = 1 , then the row will not belong in the randomization.
my code in the query is
$result = mysql_query( " SELECT * FROM `$haha` ORDER BY RAND() limit 1");<br>
$result = mysql_query( " SELECT * FROM `$haha` ORDER BY RAND() limit 1 Where Status=0");
But it does not work.. i appreciate your replies.. thank you very much!
Try below code:
$result = mysql_query("SELECT * FROM `".$haha."` Where Status=0 ORDER BY RAND() limit 0,1");
Your where clause should be before then the order by clause.
And want to know what is the value of $haha.
You use the wrong syntax. The good one:
$result = mysql_query( " SELECT * FROM `$haha` Where Status=0 ORDER BY RAND() limit 1");
Related
I've got returns results from a query but I would like it to return multiple results, this is the current query:
$qry = "SELECT * FROM properties WHERE isLeased = 0 AND featured = 1 ORDER BY RAND() LIMIT 9";
$res = mysqli_query($mysqli, $qry) or die('-1' . mysqli_error());
What I would like is for it to return those results, as well as the results for:
$qry = "SELECT * FROM properties WHERE isLeased = 0 AND propertyType = 'For Sale' ORDER BY RAND() LIMIT 3";
$res = mysqli_query($mysqli, $qry) or die('-1' . mysqli_error());
But if I just add the second section of code below the first one it only returns the results of the first one.
How could I tell it to return results based on a couple of tables?
You can use a UNION query:
SELECT t1.*
FROM
(
SELECT *
FROM properties
WHERE isLeased = 0 AND featured = 1
ORDER BY RAND()
LIMIT 9
) t1
UNION ALL
SELECT t2.*
FROM
(
SELECT *
FROM properties
WHERE isLeased = 0 AND propertyType = 'For Sale'
ORDER BY RAND()
LIMIT 3
) t2
I want to use php to determine which table my information is coming from but don't know how to place the PHP correctly into the statement.
Say I have the tables:
page1_articles
page2_articles
page3_articles
And I give the page an ID of $page = "page1" or $page = "page2" or $page = "page3"
How can I use this in my SELECT statement:
$get_articles_sql = "SELECT * FROM $page_articles ORDER BY views DESC LIMIT 5";
This should work for you:
$get_articles_sql = "SELECT * FROM " . $page . "_articles ORDER BY views DESC LIMIT 5";
With this you concat $page which could be page1 or page2 or page3 with the string _articles
Edit after comment:
Escape your variable if you didn't do that already! with this:
mysql_real_escape_string($page);
this will work
$get_articles_sql = "SELECT * FROM ".$page_articles." ORDER BY views DESC LIMIT 5";
this code will work better
$get_articles_sql = "SELECT * FROM ".$page_articles." ORDER BY views DESC LIMIT 5";
this code is be best
$get_articles_sql = "SELECT * FROM {$page_articles} ORDER BY views DESC LIMIT 5";
I have the following code which selects information from one random row.
$query = mysql_query("SELECT * FROM lines_angles_shapes ORDER BY RAND() LIMIT 1 ");
while($rows = mysql_fetch_array($query))
{
$question = $rows['question'];
$hint = $rows['hint'];
$level = $rows['level'];
$keyword = $rows['keyword'];
$showme = $rows['showme'];
$picture_path = $rows['picture_path'];
}
This works well for me but I now I need to be able to select two more DIFFERENT pictures from the picture_path column and assign them to variables. Again, all three rows need to be different.
Any tips for a newbie on how to do this?
Just change your query as follows:
$query = mysql_query("SELECT * FROM lines_angles_shapes ORDER BY RAND() LIMIT 3");
You are ordering by ORD() so it will give you different records.
No, new modification, just change the limit to 3 (whatever your need).
$query = mysql_query("SELECT * FROM lines_angles_shapes ORDER BY RAND() LIMIT 3");
As your are already getting random values with order by clause it will always return different values so you just need to edit your limit value and you are done!
$query = mysql_query("SELECT * FROM lines_angles_shapes ORDER BY RAND() LIMIT 3");
I'm trying to convert a script from basic sql to pdo. I'm not so good at it, but i have come this far that my pdo returns all the rows in the database (limit 12) i can make 2 statements one without the limit and one with the limit. but in the sql that is originally there, it uses QL_CALC_FOUND_ROWS what this does I think, is that i returns the total rows, and the limit rows, so that the query is faster.
How can i do it with PDO ?
CODE:
<?
// NORMAL SQL
$result = mysql_query('SELECT SQL_CALC_FOUND_ROWS * FROM photos ORDER BY id ASC limit 12');
$row_object = mysql_query('SELECT Found_Rows() AS rowcount');
$row_object = mysql_fetch_object($row_object);
$actual_row_count = $row_object->rowcount;
// PDO
$result = $pdo->prepare('SELECT * FROM photos ORDER BY id ASC limit 12');
$result->execute();
$TOTALrows = $result->rowCount();
?>
EDIT:
Tried some things but this won't work:
$result = $pdo->prepare('SELECT SQL_CALC_FOUND_ROWS * FROM photos ORDER BY id ASC limit 12');
$result->execute();
$resultALL = $pdo->prepare('SELECT Found_Rows() AS rowcount');
$resultALL->execute();
$resultALL->fetch(PDO::FETCH_OBJ);
$actual_row_count = $resultALL->rowcount;
EDIT2: Still no success..
$result = $pdo->query('SELECT SQL_CALC_FOUND_ROWS * FROM photos ORDER BY id ASC limit 12');
$resultALL = $pdo->query('SELECT Found_Rows() AS rowcount');
$resultALL->fetch(PDO::FETCH_OBJ);
$actual_row_count = $resultALL->rowcount;
print_r($actual_row_count);
echo $actual_row_count;
Doesn't echo anything.
Credits also go to Explosion Pills here...
When you're not feeding your query with external input, you don't really have to prepare your statement:
$result = $pdo->query("SELECT SQL_CALC_FOUND_ROWS * FROM photos ORDER BY id ASC LIMIT 12");
This should work!
I'm not sure exactly how to explain what the query does, however the problem isn't entirely with how it's set up, because it does work, in another instance, when I use it as an array, however it's not working when I use it with mysql_fetch_assoc(), so here is what my original query is(not the one im having trouble with):
SELECT * FROM
(SELECT * FROM comments
WHERE postID='$id' AND state='0'
ORDER BY id DESC LIMIT 3
) t ORDER BY id ASC
what this does is selects the last 3 comments on a post, then orders them in another way (so they show up in the correct order, old to new) Now this is the query for echoing out the array of comments directly.
But now what I want to do, is to just get the first id out of the 3 comments.
here's what I have tried to do (and by the way, this query DOES work, when i replace my previous query to echo out the results in an array, but i need to get just the id for use, i don't want an array):
$previousIDq = mysql_fetch_assoc(mysql_query("
SELECT * FROM
(SELECT * FROM comments
WHERE postID='$id' AND state='0'
ORDER BY id DESC LIMIT 3
) t ORDER BY id ASC LIMIT 1"));
$previousID = $previousIDq['id']; //this doesn't return the id as I want it to.
Your problem may be that there are no matching rows.
Also, I think you could also improve your query to this:
SELECT * FROM comments WHERE postID='$id' AND state='0' ORDER BY id DESC LIMIT 2,1
But as others say, use PDO or MySQLi, and with prepared statements. And don't SELECT * ever.
try a var_dump($previousID) to see what you get
It is probably giving you back an object, and you need to get your id from that object
You script is too condensened for error handling, let alone debugging
$mysql = mysql_connect(...
$query = "
SELECT * FROM
(SELECT * FROM comments
WHERE postID='$id' AND state='0'
ORDER BY id DESC LIMIT 3
) t ORDER BY id ASC LIMIT 1
";
$result = mysql_query($query, $mysql);
if ( !$result ) { // query failed
die('<pre>'.htmlspecialchars(mysql_error($mysql)).'</pre><pre>'.htmlspecialchars($query).'</pre>');
}
$previousIDq = mysql_fetch_assoc($result);
if ( !$previousIDq ) {
die('empty result set');
}
else {
$previousID = $previousIDq['id'];
}
You need to separate your code to be able to debug
$query = "SELECT * FROM
(SELECT * FROM comments
WHERE postID='$id' AND state='0'
ORDER BY id DESC LIMIT 3
) t ORDER BY id ASC LIMIT 1";
$result = mysql_query($query);
echo mysql_error(); //what eror comes out here
while($previousIDq = mysql_fetch_assoc($result))
{
print ($previousIDq['id']);
}
NOTE: mysql_* is depreciated, upgrade to mysqli or PDO
Please stop using mysql_ functions to write new code, it is being deprecated. Use mysqli_ or PDO functions (mysqli below).
Bind your parameters to prevent SQL injection
Always use a column list (don't use SELECT *)
If you're returning > 1 row, use a while loop
mysqli_ solution
$link = mysqli_connect("localhost", "user_name", "password", "stock");
if (mysqli_connect_error()) {
die('Connect Error (' . mysqli_connect_errno() . ') ' . mysqli_connect_error());
}
$stmt = mysqli_prepare($link, "SELECT t.id FROM
(SELECT id FROM comments
WHERE postID = ? AND state = 0
ORDER BY id DESC
LIMIT 3) t
ORDER BY id ASC");
mysqli_bind_param($stmt, 's', $id) or die(mysqli_error($dbh));
$result = mysqli_stmt_execute($stmt) or die(mysqli_error($link));
while($row = mysqli_fetch_assoc($result)) {
echo $row[id];
}
mysqli_close($link);
mysql_ solution
$stmt = "SELECT t.id FROM
(SELECT id FROM comments
WHERE postID = $id AND state = 0
ORDER BY id DESC
LIMIT 3) t
ORDER BY id ASC";
$result = mysql_query($stmt) or die(mysql_error());
$row = mysql_fetch_assoc($result);
while($row = mysql_fetch_assoc($result)) {
echo $row[id];
}