I'm trying to make models layout with pagination. pageSize is 8. Here is the code:
$count = Salon::model()->count($criteria);
$this->pages = new CPagination($count);
$this->pages->pageSize = Yii::app()->params['catalogPageSize'];
echo 'count1: ' . count(Salon::model()->FindAll($criteria));
$this->pages->applyLimit($criteria);
echo 'count2: ' . count(Salon::model()->FindAll($criteria));
The output is:
count1: 9
count2: 7
Why is it so? I can't get no answer...
CPagination doesn't work correctly on complex queries which contain duplicates of objects. The result query with no limit returns 14 lines (9 objects with duplicates). I will try to implement pagination w/o CPagination.
Related
I am wanting to count all occurrences of the # symbol in a field and originally i thought LIKE '%#%' would be the way to go, but if the character appears in the field more than once it only counts it as one.
What other method are there that i could use that would count every occurrence?
Thanks.
EDIT
For anyone needing it, this is what i ended up using that works.
$count = 0;
$sql = mysql_query("SELECT LENGTH(field_name) - LENGTH(REPLACE(field_name,'#','')) AS 'occurs' FROM table_name WHERE field_name LIKE '%#%'");
while ($data = mysql_fetch_assoc($sql)) {
$count += $data['occurs'];
}
echo $count;
select length('aa:bb:cc:dd')-length(replace('aa:bb:cc:dd',':',''));
source: http://lists.mysql.com/mysql/215049
You could make this even simpler by using the ``substr_count function in php. see below.
$message = $row['themessage'];
echo substr_count($message, '#');
what this will return is the number of times # has occurred in your "themessage" field in your database.
I'm reading from a csv file and after grouping those datas I'm doing a count operation . Is there any way to store the datas into a folder name bad if the count is 0 and to good if the count is > 0 . I tried with the below code but it is not happening .
CODE :
STORE countVal INTO '/user/cloudera/good' IF countVal > 0 ;
USE function SPLIT. Refer :
https://pig.apache.org/docs/r0.7.0/piglatin_ref2.html#SPLIT
SPLIT A INTO X IF f1<7, Y IF f2==5, Z IF (f3<6 OR f3>6);
There are a couple of ways this :
1)Use the split function to perform the split based on the criteria.
SPLIT data into good if count>0, bad if (count==0);
2)Use a FOREACH loop to separate the data based on a criteria, using a BinCond operator.
X = FOREACH A GENERATE , data, (count>0?"good":"bad");
i have a SQL INSERT sequence in PDO like:
INSERT INTO property (id,name,addres...) VALUES (:id,:name,:address...)
And i want to do a UPDATE sequence, with the same fields. The problem is that i have 150 fields and about 3 or 4 different sequences, so if i make the update syntax manually its probably that it takes a lot of time and a lot of mistakes, is there any "automatic" way to convert it?
Thank you a lot
The way I would do this, is have a function which dynamically builds the query based on key-value pairs passed in an array:
function updateTable($table, $values)
{
// Set the base query
$query = 'UPDATE ' . $table;
// Build the query with the key value pairs
foreach($values as $key=>$data) {
$query . ' SET ' . $key . ' = ' . $data . ' ';
}
// Execute your query here
...
}
Obviously you would need to bind your PDO objects on each iteration of the loop but I wanted to give you the basic layout of a loop to handle what you want to achieve, you could then call it like this:
updateTable('Products', { 'product_name' => 'Apple', 'product_price' => 100.00})
This would then build the query:
UPDATE Products SET product_name = 'Apple', product_price = 100.00
You could easily extend this query to provide a WHERE parameter so you can refine your UPDATE query - please remember this is currently in-secure so please spend some time implementing proper sanitsation over variables before committing to the DB!
Hope this helps.
I have a table called " Stat " in my MongoDB database in Rails 3 .
In that table, there is an array field called "services" .
I want to find all Stats that have a services array that contains the value "lights" .
I want to do something like this :
#stats = Stat.all
#stats1 = #stats.where("services contains lights")
Rails.logger.info "result: #{#stats1.count} "
I've tried various things and Googled it extensively, found some leads but nothing that seems to work. I have four records that should match this query but the above returns a zero set.
Is what I want to do possible in rails 3 / mongo ?
Try this,
#stats = Stat.all
#stats1 = #stats.where("'lights' = ANY (services)")
Ok I found the answer to this question:
#stats = #stats.where(:services.in =>['lights'] )
and I also found by poking around that the inverse is:
#stats = #stats.where(:services.nin =>['lights'] )
nin instead of in
I'm a novice in mySql.
I'm trying to replace a value in the xml column of my table.
my select method works.
SELECT * FROM `comics` WHERE ExtractValue(xml,'comic/pageNumber') = 6
my replace method doesn't. I've been searching for the correct syntax for a bit now...
SET xml.modify(
replace value of ('comic/pageNumber') with 5
)
some background:
this situation comes up when i delete a comic page.
it leaves a gap in the page numbers, after which i would either:
iterate through all the comics and remove any gaps in the page numbers.
or
iterate through all comics with pageNumber larger than the deleted page, and reduce their pageNumber by 1.
How about
UPDATE comics
SET xml = UpdateXML(xml,'comic/pageNumber', '<pageNumber>5</pageNumber>')
WHERE ExtractValue(xml,'comic/pageNumber') = 6
Tested on MySQL version 5.1
UPDATE `comics`
SET xml = UpdateXML(xml,
'comic/pageNumber',
concat('<pageNumber>',(ExtractValue(xml,'comic/pageNumber')+1),'</pageNumber>'))
WHERE ExtractValue(xml,'comic/pageNumber') >= 1
You'd be better off actually storing the fields in the table, rather than a single field with xml in it. Then the following would work. Otherwise there's not much point using a relational database at all.
BEGIN;
DELETE FROM `comics`
WHERE `comicID` = :id AND `pageNumber` = :page;
UPDATE `comics` SET `pageNumber` = `pageNumber` - 1
WHERE `comicID` = :id AND `pageNumber` > :page;
COMMIT;