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Questions tagged [data-retrieval]

Data retrieval involves extracting the wanted data from a dataset.

In order to retrieve the desired data the user present a set of criteria by a query which selects the demanded data from the dataset. The retrieved data may be stored in a file, printed, or viewed on the screen.

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SQL Server: is there a way to theoretically estimate retrieval time of a query

i will be having a Database with more than 8 hundred billion records, i am gonna be querying the DB via SQL Server ONLY to retrieve records i.e. SELECT queries only. i am gonna be retrieving from 1 to 36,000,000 records, plus i will also think about…
Moon
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What data retrieval method is good if I don't know schema of database?

I am retrieving all tables, and make sql. But I want something that can handle Take, Skip. Differences between databases.
Igor Golodnitsky
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I am unable to navigate to detail page from List Tile Page and show retrieved data of the particular item

I have uploaded few text items, image items and pdf documents to firebase database / storage and and able to retrieve all of them in HomeScreen i.e Vertical CardsUI list as well as ListTiles View with one image, one title and one subtitle. But…
srk2K21
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trying to output from firestore db to textview but get nullpointexception

having issues displaying to a textview from firestore db due to asynchronous process I have tried to notify the textviews but they are not bound by any thread apparently The displayed data can be logged to console but is not displayed to the…
Steve Nginyo
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Problems With Retrieving Values From a Dictionary

I'm trying to make an interpreter for a toy language for learning more about how they work and so on, I'm now stuck on retrieving stored variables. At first I used a dictionary where both the key and value is a string type. But after running in to…
K. Hansson
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Get the row count of a MYSQL table where each row contains same date

I have a MYSQL table called "LCI" in which I have the flowing columns and datatypes respectivelyas shown in the picture. The java application reads two user inputs User name and a date UI where user have to give User name and a date. and compare…
Jay K
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Displaying a number from the database in a javascript alert box

The following code is to used to display an alert box with the order number when a html form is submitted successfully! $mysql="SELECT MAX(OrderNo.) FROM `order` "; $results=mysqli_query($db,$mysql); $row=mysqli_fetch_array($results); …
Kasun Kumara
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How to update the value of a boolean variable in swift?

I've spent the past 3 days trying to figure this out. I can easily do what I want to do in Java but as soon as I try to do it in Swift, Xcode gives me a hard time. In this case, I am trying to retrieve a boolean object from Parse that will tell me…
Schuey999
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PHP retrieves the same row multiple times instead of retrieving all table's rows

I am trying to print all members reports (complains) to the admin in this form: sender name:... reported user name:... First I wanted to select each sender name directly from complaint table(using for loop), then find the matched reported user…
Najd
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Retrieve data from a complex table

While searches the date range, start date (date_reg) and end date (date_reg) , the mysql result should be have each main_table rows contains latest return, received, balance of each products. E.g.: Between 10-01-2014 and 10-05-2014, should…
J.K
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Make a Form retreive a data from the page it was launch from... Possible?

im using pho forms in dreamweaver, i did a comments form, as in users will be able to comment about the items in my website, each individually. But its the same form for every page, which is why i need for the form to retreive the tittle of the page…
VLP
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PHP OOP retrieve data from database, initializing it and echo-ing it

Hi all I need your advice on whether the following way of coding is acceptable and what better way to code in terms of 3 things, retrieving data, initializing variables and echoing it. class Product { private $product_name = array(); private…
Jian Short
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Retrieving member data from MySQL

I have a members page where people can download pdfs upon signup. The signup is recorded to a MySQL db. I use Concrete5 as my CMS. Is it possible to retrieve which pdfs have been downloaded by which member after they have signed in? I have access to…
Rubba
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How to Build a Dynamic Web Scraper/Crawler: Python

Not really sure the complexity of this question, but figured I'd give it a shot. How can I create a web crawler/scraper (not sure which I'd need) to get a csv of all CEO pay-ratio data. https://www.bloomberg.com/graphics/ceo-pay-ratio/ I'd like this…
Sean. D 1528
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Sending emails to email addresses retrieved from database using php

I have a column (named user_email) in a table called (event) in my database, This column has email addresses. I want to get all these email addresses and send one email for all of them. I tried to use 'for'loop but it only sends the email to one…
SamQ
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