joy_of_learing

Search This Blog

UNIT -2 Relational data model

on January 10, 2022

Get link
Facebook
X
Pinterest
Email
Other Apps

UNIT-2 Relational data model

Get link
Facebook
X
Pinterest
Email
Other Apps

Comments

Android Studio error 100% solution

Your Android App Bundle is signed with the wrong key. Ensure that your app bundle is signed with the correct signing key and try again Error number one: You need to use a different package name because 'com. example' is restricted. Error number two : Your Android App Bundle is signed with the wrong key. Ensure that your App Bundle is signed with the correct signing key and try again. Your app bundle is expected to be signed with the certificate with fingerprint: SHA1: AF:B7:23:F7:EE:DD:D3:82:5A:CF:F8:C0:57:E2:4D:F1:A0:AD:B3:C4 but the certificate used to sign the app bundle that you uploaded has a fingerprint: SHA1: 4E:E4:20:0A:51:67:F0:08:13:9D:AC:FB:94:41:C8:A1:18:6C:A7:0B Solution : The error message is telling it all. You need to use a package name of your own. The package name is the identity of the application. ie. when you create an Android Studio Project you have to simply mak...

Mastering Relational Algebra for Efficient Database Queries | DBMS Queries

Introduction Relational algebra is a fundamental concept in the world of databases. It provides a structured way to manipulate data stored in relational database systems. In this article, we will explore the power of relational algebra through practical examples and queries. Query 1: Finding Employees at IBM Heading 1: Query Description In this query, we will discover how to retrieve the names, street addresses, and cities of residence of all employees who work for 'IBM' and earn more than Rs. 15,000/- Heading 2: SQL Query SELECT L.person_name, L.street, L.city FROM Lives L JOIN Works W ON L.person_name = W.person_name WHERE W.company_name = 'IBM' AND W.salary > 15000 ; Query 2: Exploring Company Locations Heading 1: Query Description In this section, we aim to find the names of all companies located in "Nagpur." Heading 2: SQL Query SELECT DISTINCT L.company_name FROM Located - in L WHERE L.city = 'Nagpur' ; Query 3: Employee Data...

All About Django: A Comprehensive Guide

All About Django: A Comprehensive Guide All About Django: A Comprehensive Guide Introduction to Django Django is a free, open-source framework that simplifies web development with Python. It follows the "Don't Repeat Yourself" (DRY) principle, boosting productivity. Setting Up Your Django Environment Create a virtual environment for your project to manage dependencies. Use tools like virtualenv to keep your project environment isolated. Creating a Django Project Use the django-admin tool to start a new project. Projects are the highest-level organizational structure in Django. Understanding Models and Databases Models define the structure of your data, and Django's ORM helps interact with databases seamlessly. Building Dynamic Web Pages with Templates Templates enable you to create dynamic HTML by embedding Python code. Use template tags to achieve logic within HT...

Powered by Blogger

UNIT -2 Relational data model

UNIT-2 Relational data model

Comments

Post a Comment