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  • How to pass in password to pg_dump?

    - by Mark
    I'm trying to create a cronjob to back up my database every night before something catastrophic happens. It looks like this command should meet my needs: pg_dump dbname | gzip > $(date +%Y-%m-%d).psql.gz Except after running that, it expects me to type in a password. I can't do that if I run it from cron. How can I pass one in automatically?

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  • How to get the duration of the video uploaded ?

    - by Holicreature
    i'm using ffmpeg to convert videos to desired formats and to generate the thumbnails.. I want to find the total duration of the video to display in the main page along with the thumbnails.. Can i use ffmpeg to find the duration when its being uploaded and store them on the database.? Is storing the duration in db is necessary or else is there any other method?

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  • What is the best way to create derived properties

    - by user342788
    I have a datamodel with to-many to-many relations. Using the example of employee database let say the entity division is related to department which in turn is related to employee. The employee has an attribute salary. How best to have a attribute at the level of division which is derived from the salary attribute. For example average salary or maximum salary. I would need those attributes to sort the list of departments.

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  • Removing "duplicate objects"

    - by keruilin
    Let's say I have an array of objects from the same class, with two attributes of concern here: name and created_at. How do I find objects with the same name (considered dups) in the array, and then delete the duplicate record in the database. The object with the most-recent created_at date, however, is the one that must be deleted.

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  • technology for new webproject?

    - by elCapitano
    Hi there, i am planing to set up a new webproject which has to use a database and a model which can be presented in a browser. I looked at a lot of technologies (JSF, PHP, ..) but i could not find a free and easy framework/technology for me (in the end i prefered asp.net, but this is not free). What can you recommend me for a new webproject from scratch?

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  • How to implement callback functions inside classes (PHP)

    - by sombe
    I need to use a class callback method on an array inside another method (the callback function belongs to the class). class Database { public function escape_string_for_db($string){ return mysql_real_escape_string($string); } public function escape_all_array($array){ return array_filter($array,"$this->escape_string_for_db"); } } Is this the right way to go about that? (I mean, in terms of the second parameter passed to array_filter)

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  • insertion in the same row for all activities

    - by Utman Alami
    i am here to ask for help again, i created one database for all activities, the problem i have is that the insertion in every activity comes in with new row, but that's not what i want, what i am looking for is in the same row in each activity insert the columns that contains. i already looked for solution here, they are speaking about static reference but i don't know how to do it! so, is there any ideas ? static DBAdapter db = new DBAdapter();

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  • In ruby on rails, is it possible to do a sum query with group by using the find_each batching?

    - by BarryOg
    I'm loading data from my database and I'm doing a sum calculation with a group by. ElectricityReading.sum(:electricity_value, :group => "electricity_timestamp", :having => ["electricity_timestamp = '2010-02-14 23:30:00'"]) My data sets are extremely large, 100k upwards so I was wondering if its possible to use the find_each to batch this to help with memory overhead. I can write the batching manually use limit and offset I guess but I'd like to avoid that if the code already exists.

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  • How do I mysql select with aliases from another table?

    - by Rob
    I'm working with a CMS system where I cannot control database column names. And I've got two related tables: Table: content +------------+----------+----------+----------+----------+ | content_id | column_1 | column_2 | column_3 | column_4 | +------------+----------+----------+----------+----------+ | 1 | stuff | junk | text | info | | 2 | trash | blah | what | bio | +------------+----------+----------+----------+----------+ Table: column_names +------------+-------------+ | column_id | column_name | +------------+-------------+ | 1 | good_text | | 2 | bad_text | | 3 | blue_text | | 4 | red_text | +------------+-------------+ What I'd like to do here is select from the first table, but select the columns AS the column_name from the second table. So my result would look like: +------------+-----------+----------+-----------+----------+ | content_id | good_text | bad_text | blue_text | red_text | +------------+-----------+----------+-----------+----------+ | 1 | stuff | junk | text | info | | 2 | trash | blah | what | bio | +------------+-----------+----------+-----------+----------+

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  • JQuery search page textbox

    - by Geetha
    Hi all, I am creating a search page using asp.net[c#] with jquery. Needs: If we are typing a word in the text box, for each letter it has to display the related word in the database. ex: step 1. w [display: world Whole] step 2: wor[display: World] How to achieve this using jquery Geetha.

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  • How to count NULL values in MySQL?

    - by abbr
    I want to know how can i find all the values that are NULL in the MySQL database for example I'm trying to display all the users who don't have an average yet. Here is the MySQL code. SELECT COUNT(average) as num FROM users WHERE user_id = '$user_id' AND average IS_NULL

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  • SQL updating a column in a table

    - by tecnodude
    Hi, I have the following table in an access database id VisitNo Weight 1 1 100 1 2 95 1 3 96 1 4 94 1 5 93 Now row 2 and 4 are deleted. So i have... id VisitNo Weight 1 1 100 1 3 96 1 5 93 However what i need is... id VisitNo Weight 1 1 100 1 2 96 1 3 93 What is the SQL query i need to accomplish the above? thanks

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  • How to make db structure for multiple input in MySQL and PHP

    - by bob
    Below is my current structure for MySQL database id | item_name | item_files ------------------------------------------ 1 | Item A | file1.zip,file2.zip,file3.zip 2 | Item B | file3.zip Example I create simple form to fill up Item Name and Multiple upload files then store it to db. Question :- How to design the db structure for accept the multiple files? There have a way which I don't want to use explode, implode to get the file1.zip file2.zip file3.zip

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  • NUL symbol gets inserted anywhere in the XML

    - by Racs
    I am using Oracle 11g and when I query data from database manually, it looks ok. But when I view it using Notepad++, there is a special character that gets inserted anywhere in the xml produced. Please see image below: I tried everything and deleted some parts of the xml, updated the db and query again but the invalid character just differ in location. Any idea is much appreciated, thanks! Best regards, Racs

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  • Many-to-many relationships examples

    - by Tom
    I haven't found any MYSQL many-to-many relationships examples here and in google. What I am looking is to see a very simple example with php+mysql showing database's results. Can anybody write a very simple example?

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  • Linq To Entities

    - by JkenshinN
    This has probably been answer already but I am trying to return the primary key after inserting a record to the database. Does anyone know how this is accomplish after the record has been created?

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  • In a MySQL SELECT query, can I use my "AS column" in a WHERE specification?

    - by user556352
    In my database I calculate distance between nodes with: SELECT DISTINCT dest.name, AsText(orig.location), AsText(dest.location), round((glength(linestringfromwkb(linestring((orig.location), (dest.location)))))) as distance FROM nodes orig, nodes dest WHERE orig.name='GERP' I would like to add "and distance < dest.visibility" at the end, but am told that distance is an unknown column. Any insight very much appreciated.

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  • Resize a MovieClip on AS2 in function of text len?

    - by DomingoSL
    Hello, i have a AS2 script who get information from a MySQL database. This information is a text from 0 to 300 chars. I want to display that text in this layout: I want to resize the black box you see on the picture in function of the amount of text imported. Any idea of how to do that on AS2? The instance name of the box is: cargador.fondo (only want to resize height) The instance name of the text is: cargador.texto Thanks.

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