Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers.
Questions asking for code must demonstrate a minimal understanding of the problem being solved. Include attempted solutions, why they didn't work, and the expected results. See also: Stack Overflow question checklist
Closed 9 years ago.
Improve this question
I'm using postgresql database. I want to do an pagination for my articles, but i have no idea how to do it. I havent found a solution for postgresql (found some for mysql).
This is my query.
$user->getUsers(); - I call method, which is doing query..
function getUsers()
{
$this->querySelect("SELECT vk_id, eu_name, eu_data, eu_society, eu_want_team, eu_notes, eu_main_profession, eu_avatar FROM users");
}
I have read, that query should contain LIMIT, but it just only limit the results quantity. Can anybody tell me how to do that pagination please?
Will be very thankful..
If you really want Postgresql to do this, you're looking for OFFSET and LIMIT combined.
LIMIT means no more than that many rows will be returned.
OFFSET says to skip that many rows before beginning to return rows.
Also, you have to have an ORDER BY clause on your query for this to work.
You'll have to keep track of the page size and which page you are on.
Here is a relevant documentation page (Postgresql 8.4)
http://www.postgresql.org/docs/8.4/static/queries-limit.html
Related
Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers.
Questions asking for code must demonstrate a minimal understanding of the problem being solved. Include attempted solutions, why they didn't work, and the expected results. See also: Stack Overflow question checklist
Closed 9 years ago.
Improve this question
I have a table wich contains:
RO;DE;ES;AU;IT;
How display data where DE is show on table! I need for milions queries!
It seems like you have multiple values in the same "cell". You will need to process the string. One way is to use wildcards:
SELECT something FROM something WHERE field LIKE '%DE%'
Please note however that your table design is absolutely terrible. It violates the first normal form. You should never have multiple values in a single cell that you then have to split using wildcards or other string functions. This adds overhead to your queries and will slow them down significantly. You say that you have millions of records, the impact of not having separate values has the potential to be quite large.
You should definitely think of breaking those strings into multiple records if you can.
Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers.
Questions asking for code must demonstrate a minimal understanding of the problem being solved. Include attempted solutions, why they didn't work, and the expected results. See also: Stack Overflow question checklist
Closed 9 years ago.
Improve this question
I have a table, codes, with 3 columns (code, email, sent).
How do I call on the first X number of rows of table codes and assign each individual code (in code column) a variable with ordered numbers? (ie $code1, $code2, $code3, $code4)
Now, I will be calling on a multiple of 10 rows (10 rows, 20 rows, 30 rows) at a time so I need to be able to call on these codes individually for other procedures.
Thanks so much for the help!
Try putting the results in an array. Then call on them by using $code['1'] or what ever you are looking for
Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers.
Questions asking for code must demonstrate a minimal understanding of the problem being solved. Include attempted solutions, why they didn't work, and the expected results. See also: Stack Overflow question checklist
Closed 9 years ago.
Improve this question
Can anyone help with this, if PHP and MySQL enough to count page views/number of downloads precisely? I need to count how many times a wallpaper is being downloaded.
If yes, how can we do that? Thanks a lot for the help.
There are a number of online tutorials for creating page hit counters. There are several on phpAcademy.org alone.
You might find this one to be most helpful:
https://phpacademy.org/course/unique-hit-counter
And here is a tutorial video for setting up Google Analytics on your site:
http://www.youtube.com/watch?v=ZUTNLzzde60
As well as an article for Beginners
mysql is not even needed to solve that problem.
here it is solved by writing a file with the download count
PHP - Count downloads
Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers.
Questions asking for code must demonstrate a minimal understanding of the problem being solved. Include attempted solutions, why they didn't work, and the expected results. See also: Stack Overflow question checklist
Closed 9 years ago.
Improve this question
I am doing a project where i have to fetch data of between dates plus the name of user.
The query for only date betweenis working fine but with and operater its going in wrong way so please suggest me how to implement it to achieve desired output.
this is my code:
$qry11=mysqli_query($con,"select * from entry where (create_date between '$first' and '$second') && cnor='$nme'");
so please suggest ne how to do this....any idea will be appreciate with highly gratitude.
&&
should be replaced with
AND
You seem to be already using AND in your query right
(create_date between '$first' and '$second')
use the query like below
$qry11=mysqli_query($con,"select * from entry where (create_date between '$first' and '$second') and cnor='$nme'");
Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers.
Questions asking for code must demonstrate a minimal understanding of the problem being solved. Include attempted solutions, why they didn't work, and the expected results. See also: Stack Overflow question checklist
Closed 9 years ago.
Improve this question
In PHP, I would like to run a query that would delete every row in a database that had the ID of less than a figure.
The context I want to use it in, is running a PHP CRON job every 24 hours that will delete all rows with values in the 'time' column that are LESS THAN time();
Putting it in to another context: I want to run a query that will delete every row that has an ID of ~10.
Thanks
I imagine you are not very familiar with SQL. This is a simple delete statement:
delete from t
where id < 10;
This assumes that by "database", you really mean "table". It also makes some other assumptions about foreign key references in other tables. Because the question seems so basic, I am guessing these are not issues.
However, I would recommend that you study up a bit on databases if you are going to use them in your applications.