SQLite: Mastering Android SQLite Database Development

Master Android sqlite database development by learning why to use sqlite for local data storage, its lightweight embedded design, sql data types, and sqlite open helper with onCreate and onUpgrade.

Learn how the Android SQLite database class handles opening, querying, inserting, updating, and deleting data. Use raw SQL or a query builder, content values, and a cursor to read records.

Create and configure an Android SQLite database with a DB helper class, implement onCreate and onUpgrade, define an employee table (id, name, designation), and insert/display data in a list view.

Add and fetch records in an Android SQLite database using a single activity and db helper, with update and delete options and cursor-based reading.

Update and delete an employee record in the Android SQLite database by selecting an id, pre-populating fields, and applying updates with content values and db.update.

Delete an employee record in android sqlite by id using the writable database and delete method, while noting the helper class, table schema (id, name, designation), and insert workflow.

Export the Android SQLite database by executing raw SQL queries, then use a cursor to fetch records and assemble an employee data array.

Learn how to store data in iOS 12 using SQLite, an embedded C-based RDBMS accessed with SQL. Explore its advantages, limitations, and a practical insert, read, update, and delete workflow.

Build an iOS checklist app in Xcode 10.3 with a single view and table view for tasks, add tasks via an alert text field, and edit and delete with SQLite.

Demonstrates creating and presenting a UI alert controller with a text field, configuring save and cancel actions (default and destructive options), and preparing to populate tasks into a table view.

Create the SQLite database file in the documents directory by appending the checklist task path component, then open it with SQLite and use do-catch for errors.

Open or create the SQLite database, then execute a create table if not exists query to build a checklist table with id, task, and status columns, with error handling.

Prepare and execute an insert query in SQLite by building and preparing the statement. Bind task and status parameters and handle errors.

Execute an insert into the task table by preparing a SQLite statement, binding the task and status values, and stepping to complete, with error handling and success messaging.

Create a model class named checklist task with id, task, and status; insert and read records from a SQLite database using prepared statements.

Learn to iterate over sqlite records using a while loop, prepare and execute queries, fetch id, task, and status, build task models, append to a list, and refresh the table.

Implement a write update query in Android SQLite by preparing the statement, binding task, status, and id, executing the update, and handling errors.

Implement row selection handling to update a task via an alert, toggle status, and apply or remove a strikethrough with string extensions using attributed strings.

Learn to display strikethrough for tasks and manage their state in Android SQLite by updating, selecting, and deleting rows in a table view.

Implement delete task in SQLite for checklist task by preparing a delete query, binding the id, stepping the statement, and finalizing, with comprehensive error handling for negative scenarios.

Recognize sqlite's limitations: you write insert, delete, and update queries manually, and syntax mistakes can cause errors. Codata wraps sqlite and handles table relationships—one-to-one, one-to-many, and many-to-many—reducing manual maintenance.

Learn to build an expense manager web app using Python and Flask with SQLite database, storing and querying expenses, filtering by today/week/month/year, and presenting data with pie charts.

Install flask and set up a python virtual environment, then scaffold an app folder and index.py with a basic flask route, port setting, and debug mode.

Build an expense form in a Flask app by rendering an HTML template, configuring a template folder, and adding fields for category, date, and amount to collect expenses.

Create a Bootstrap 3 styled expense form from scratch using a container, rows, and form groups, add a submit button with proper form-control styling, and set a rupee currency placeholder.

Submit a form with post method to capture expense fields using request.form and save them to a SQLite database. Create an expenses table with id, category, amount, and date.

Implement expense data management with a dedicated data helper class in Python, saving expenses via sqlite3 using prepared statements, and binding form data to insert into the expenses table.

Introduce a categories table with autoincrement id and name, and link expenses via category_id to support user-added categories and preloaded defaults.

Develop and manage an Android SQLite database by resetting and dropping tables, creating expenses and categories structures, seeding dummy category data, and querying categories to populate the frontend HTML.

Learn to fetch category data from SQLite with a row factory, expose id and name as key-value pairs for front-end templating, enabling dynamic category handling and date picker readiness.

Introduce a dynamic custom category workflow by adding an other option that shows a text box, saves new categories to the database, and updates the list in the app.

Insert a new category when 'other' is selected, obtain its id with last row id, and save the expense using that category id, date, and amount.

Convert the immutable multi dictionary from the form data into a key-value dictionary using flat true, enabling overwriting the category ID and saving the updated entry.

Retrieve expense data from a database and visualize it with matplotlib pie charts, while setting up a report module and bootstrap navigation in html templates.

Plot expenses data with matplotlib to generate a pie chart, render it in a web page, and save the figure to assets/img while handling cross-platform paths.

Consolidate expenses by category using a joined query that sums amounts and groups by category name, then plot and display the dynamic chart in the browser.

Learn to implement interval based reports in an Android SQLite app by adding daily, weekly, monthly, and yearly options with radio buttons and dictionary driven queries.

Create and use objects to access methods via the self reference, implement constructors for automatic setup, and manage the interval input with default parameters and post data for plotting.

Auto submit the report form on radio changes, handle daily, weekly, monthly, and yearly interval options with templating, and adapt queries via report.js front-end logic.

Convert date strings to SQLite date objects via Python datetime and strptime to enable reliable date comparisons and range queries, such as last 7 days and monthly.