Questions tagged [sqlite]

SQLite is a software library that implements a self-contained, serverless, zero-configuration, transactional SQL database engine.

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0answers
529 views

C++ generic SqLite 3 table to vector

I just coded method for loading data from SqLite 3 database, it is working and in test run it was successfully checked for no memory leaks: ...
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1answer
60 views

Queries using multiple tables and ANDs: should that be avoided?

This is a part of a project I am working on. I need advice and criticism regarding the data base design and general approach to querying the data. I am not at all experienced with relational data ...
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1answer
1k views

Key Value Store for Android on top of Sqlite3

I wrote this simple key-value interface on top of Sqlite3 to use in my Android app. I am using this to persist Java objects as strings converted using Gson. The public API has 3 methods. get(...
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1answer
828 views

Basic CRUD application for Product, Category & Location with SQLite

I improved the code from my previous question. At this moment, the 3 entities have not yet a connection with each other. They should only be available for CRUD actions in a SQLite database. I would ...
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2answers
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ProductManager: a basic CRUD for products with SQLite

I would like to have a review of this basic CRUD application so I can improve and learn from your experience. The code can be found here. Design pattern/coding principles improvement that could be ...
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2answers
220 views

Advanced CSV-to-SQLite converter

I just wrote an advanced CSV parser that translates CSV to SQL(SQLite Compatible) statements, which are then inserted into the database. It translates variable names in the CSV to values defined in ...
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1answer
12k views

WPF filling a DataGrid

I'm creating a WPF application with a DataGrid. I'd like some advice on the code I've written: ...
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2answers
347 views

Terrain height map generator

I wrote a Perl script that implements the algorithm described in this article to generate terrain height maps. The idea is to raise a random hill \$i\$ of size \$r_i\$ centered at point \$(x_i, y_i)\$...
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1answer
190 views

Inserting data into an SQLite database

I've execute this code in Android for inserting 100+ rows in SQLite database. My current approach takes more time to initialize the database. ...
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2answers
113 views

SQLite UPDATEs for persons and a subclass

I am using Java with SQLite and I am wondering if I am in the right track onto writing good code i.e. more or less reusable: SQL scheme: ...
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1answer
2k views

Nested SQLite transactions in jQuery

I'm using Cordova with jQuery and jQuery Mobile to develop a hybrid app. In this app I need to save data that I get from a server. The data is a ...
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1answer
2k views

Multiple Choice Guessing Game

I've built an app for members of an organization I'm in--the app shows the picture of a member with four multiple choice buttons, and the user then tries to guess the member's name. Pretty simple, ...
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2answers
128 views

Program to provide CRUD operations for a Boxers(Fighter) table in a database

I have been through a few SQLite tutorials and wrote this code on my own to reinforce the principles. The tutorials I went through varied widely in a few areas so this is what I came up with as a ...
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1answer
34 views

Writing an SQL SELECT statement

I'd like to Select columns from Table 1 with a Row Filter, Select columns from Table 2 and join. This works but it's a bit verbose. I was wondering if there is a cleaner way to write this. ...
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1answer
106 views

Searching for log entries in SQLite that involve a particular IP subnet

This reads a huge database (SQLite) and extract any IP address similar to ip_base: ...
4
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1answer
487 views

Data cleansing and formatting script

This is a script that creates a base dataframe from a sqlite database, adds data to it (also from SQLite), cleanse it and formats it all to an Excel file. I feel like it is incredibly verbose and my ...
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0answers
813 views

Structured use of Android SQLite transactions

I got tired of following Android-SQLite's transaction idiom, briefly documented here. It requires too much boilerplate code, IMHO, especially when you add the obligatory null checks. So I came up ...
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1answer
761 views

Fetching, processing, and storing Mixpanel analytics data to SQLite

I'm a self-taught Python programmer and I never really learned the fundamentals of programming, so I want to see how to improve upon this script and make it adhere to best practices. The script has ...
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1answer
208 views

Downloading, decompressing and inserting data into an SQLite database

I have implemented a Service, which executes three operations, in the following order: Downloading a compressed (.zip) CSV file Decompress the CSV file Reading the CSV file and inserting the data ...
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1answer
16k views

Python TKinter data entry window GUI for SQLITE3 table

I would like to offer for review a simple tkinter GUI window in Python 3 to be used for data entry into an SQLite database table. As a noob, this is my first attempt at OOP and my first experience ...
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1answer
58 views

Empty product model

I don't think I am using the MVC concept in Ruby on Rails properly. Model accesses db, controller works on logic and view displays information/data. But in my code, my Model code is empty. Can anyone ...
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2answers
198 views

Transferring a CSV file to a database while merging some columns

Say I am given a csv file that I want to import into an sqlite3 database. The first two columns in the csv file contain unique, important information while the rest of the columns are really a list ...
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1answer
3k views

Restore SQLite database backup

I have an application that provides the user the ability to backup the local SQLite database to another location. I then provide the ability to restore the backup database and overwrite the current ...
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2answers
517 views

Binning and calculating a huge range of data

I have a code that I'm fairly certain does what I want. Bear with me as I explain what I'm doing: Imagine that there is 10 houses, where there can be one to an infinite number of persons. Each of ...
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2answers
8k views

Is there a better SQLite update / insert pattern than this?

I've got a function which updates an existing record or inserts a new one, but it looks very clunky to me. ...
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1answer
2k views

Optimizing the performance of a nested for loop over millions of messages from SQLite Query - v2

I've posted and gotten help to optimize my code before here and here. Now I have implemented the following changes, after very helpful advice: I have implemented a Dictionary instead of using list ...
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1answer
230 views

Find the highest frequency of messages inside a time slot of 24 hours

I have a very large number (millions) of messages, each labeled with the unixtime it was sent in a SQLite database. Each message has its own userid, for the user that have sent it. I want to know what'...
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3answers
6k views

Create SQLite backups

I have this script for creating SQLite backups, and I was wondering whether you'd have any suggestions on how to improve this. I was thinking that maybe it should create the backup ...
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3answers
9k views

Inserting persons in file into SQLite

I've just started working with SQLite in C# to test various features of an application. In building my first SQLite example I wanted to insert a large .csv into a table (Person) with two columns, A ...
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1answer
2k views

Flask form validation technique

This is currently the code that I'm using to validate and check for errors in a flask app, where the form fields are coming from a /registration html page: ...
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1answer
2k views

Adding items to a database from a dialog

I have a spinner in my activity that upon selection of one of it's options needs to handle the addition of a new object to my <...
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1answer
64 views

Getting recent stations

I made a database for my Android app using SQLite and it works fine. However, as I understood, SQLite calls shouldn't be made on UI thread. Is the below okay or not? ...
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3answers
3k views

Schema design for user profile management

Is this a good design? I would like to create a view on user table to get a list of users based on filtered conditions. Please suggest ways of improving this schema design. A view example that I ...
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0answers
3k views

Real-time bitcoin data feed and storage using websocket framework

I'm trying to create data feed script for real time bitcoin data for OkCoin exchange using their websocket API (documentation) and a database manager for storing. There are two channels I am ...
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1answer
879 views

Android “Search” Activity and corresponding XML

Below is an Android Activity and corresponding XML layout. The function of the class is to search an ...
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1answer
2k views

Creating a fast Android dictionary (word counts)

This is a follow-up of my question here: I am currently working on an application for various statistics. One task is to analyse a good amount of sentences for their word counts. The specifications ...
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2answers
155 views

FizzBuzz in SQLite 2

This query performs a FizzBuzz in SQLite 2.8.17 without creating any tables or sprocs. First attempt: ...
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1answer
451 views

Using SQL to reorder items in a list view - is this efficient?

I'm writing an application for work that requires me to process a list of transactions. The list is small (5 records at the most) and I'm required to display that data in an android ...
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1answer
221 views

BananaQuery - Android one-line query

I created this library just for fun. Since I was a bit tired to write 10 lines of code to execute a simple select query in Android, I created a way make it simple. It's not so advanced and some ...
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1answer
2k views

Persistent key value store for Python using SQLite3

This is a module to implement a key value store in Python using SQLite3. Originally written to allow sharing of configuration among multiple threads that are already sharing a SQLite3 database, I have ...
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2answers
1k views

Benchmarking our LAMP servers with this php script

I've written a small script to benchmark our LAMP hosted servers that assess the performance based on three factors: Disk I/O Database I/O (mysql) Database I/O (sqlite) The logic is as follows: get ...
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2answers
178 views

Database data insertion

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1answer
239 views

Seeding a file with fake records - doing concurrent updates

I need to seed a database with user data. When trying to write records to a file using sqlite3 with node, I tried writing the logic in a naive manner, without any error checks - but it was failing ...
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3answers
44k views

Using an AsyncTask to populate a ListView in a Fragment From a SQLite table

This is the first time that I have played around with AsyncTask in Android and I wanted to make sure I'm using it correctly. The idea is I'm grabbing all the rows from a table in the database using <...
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2answers
2k views

Another way to run reports on a SpiceWorks SQLite database using a linked server in SSMS?

I created a linked server in SSMS so that I could run reports on a SpiceWorks SQLite database. there are a few quirks in the whole system. These simple queries are becoming some of the most ...
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1answer
100 views

Finding users with the highest Following vs. Friends ratio

I am trying to find the users who have the highest "Following vs. Friends" ratio in my Twitter timeline. I have a SQLite database of the users in my Twitter timeline and each column contains data ...
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2answers
5k views

SQLite Helper Class in C#

Here is a SQLite Helper Class I created. Any input appreciated, including security and simplification. ...
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3answers
1k views

Optimization for SQLite result set parsing

I am retrieving information from an SQLite database that gives me back around 20 million rows that I need to process. This information is then transformed into a dict of lists which I need to use. I ...
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1answer
1k views

Unit of Work with Generic Repository Pattern MVVM, vol. 3

Continuation of this question: https://codereview.stackexchange.com/questions/36561/unit-of-work-with-generic-repository-pattern-mvvm-vol-2 I have made some modifications: Implement lazy-loading (...
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2answers
625 views

Searching database, filtering results, adding longs

My needs outpace my abilities. This code (mostly) works, but it is really ugly, doesn't always add correctly, and is in desperate need of some help refactoring. I can't wrap my head around what ...