BULK COLLECT in PL/SQL reduces context switches & improves performance by fetching multiple rows into collections at once, ideal for large data sets.

In PL/SQL, a VARRAY is a type of collection with fixed max size, sequential access & homogeneous elements. Declare with `TYPE varray_name IS VARRAY(max_size) OF element_type;`, initialize with values & perform operations like EXTEND, COUNT, TRIM.

PRAGMA EXCEPTION_INIT maps Oracle errors to user-defined exceptions in PL/SQL, making error handling more readable & manageable. Use it to handle specific Oracle errors with meaningful exception names.

du reports disk space used by files & dirs, while df shows available disk space on entire filesystem, including mounted drives.

Named notation improves code readability & flexibility by passing correct values to right parameters, even if their order is different. It's especially useful when there are multiple params with default values.

PL/SQL Triggers: Automatically format data before insertion with BEFORE INSERT triggers. Example: Convert employee_email to lowercase using LOWER() function.

Master advanced SQL & PL/SQL features for efficient Application Development Management: stored procedures, triggers, views, CTEs, transactions, performance tuning, partitioning & data modeling.

Oracle SQL CTEs improve query readability & reusability, allowing complex queries to be broken down into manageable parts. They can also optimize performance & enable modular query design.

BULK COLLECT fetches multiple rows from a query, while FORALL performs DML ops on multiple rows efficiently, minimizing context switches between SQL & PL/SQL engines.

git fetch updates remote branches, while git pull merges changes into your local branch.

Exception handling in PL/SQL is crucial for robust programs. Handle predefined & user-defined exceptions with WHEN clauses, and use WHEN OTHERS for generic error logging.

Enable DBMS_OUTPUT.PUT_LINE in Oracle PL/SQL to print output: SET SERVEROUTPUT ON; Use DBMS_OUTPUT.PUT_LINE('text'); Example: BEGIN DBMS_OUTPUT.PUT_LINE('Hello, World!'); END; /

Masking salaries in SQL: Two approaches to hide last two digits using Oracle SQL, either with `CONCAT` function or `||` (pipe) symbols for concatenation.

Creating a table, inserting data & using cursors in PL/SQL: Declare cursor, open, fetch & process data with DBMS_OUTPUT.PUT_LINE for output.

Here's a simple example of an AFTER INSERT trigger in PL/SQL that logs changes when an employee is added. It creates two tables: `employees` and `employee_audit`, then inserts data into `employees` and checks the audit log.

Learn Table Creation, Data Insertion & Subquery Examples in Oracle SQL: Create tables, insert sample data, and practice various subqueries like single-row, multiple-row, correlated, EXISTS, scalar, inline views & HAVING with subqueries.

ROW_NUMBER() assigns unique sequential integers, RANK() skips ranks for ties, DENSE_RANK() assigns same rank to tied rows without gaps.

Knowledge management is a hot topic, but what exactly is it? Defining knowledge is tricky, with many sources lacking clear explanations.

ROW_NUMBER() in SQL: assigns a unique number to each row, regardless of ties or rank gaps. Example: `SELECT EMPLOYEE_ID, DEPARTMENT_ID, SALARY , ROW_NUMBER() OVER (PARTITION BY DEPARTMENT_ID Order by salary desc) FROM employees1;

Customize LinkedIn referral message with template: "Hi [Recipient's Name], I'm [Your Name] & enthusiastic about [SDE Position] at [Company Name]. My skills align well with requirements. Can refer me?

Dopefolio is a blazing fast multipage portfolio template for developers, featuring easy setup, free to use (open source), no additional frameworks or libraries, and super fast SEO optimization.

ES6 introduced new syntax improvements to JavaScript, including let/const keywords, arrow functions, template literals, destructuring assignment & more.

Set up HomeScreen component to fetch products from API, handle errors & render list. Use useState & useEffect for data fetching and rendering. Ensure import statements & error handling are in place.

An Immediately Invoked Function Expression (IIFE) in JavaScript runs immediately after definition, avoiding global scope pollution & creating a private scope for variables.

Docker automates deployment, scaling & management of apps in lightweight containers. Containers ensure consistent behavior across environments.

Use Redis to cache API requests in Node.js! Install Redis, create a new project, and use `redis.createClient()` to connect. Cache data with `redisClient.setex()` and improve performance by reducing repeated fetches.

Top 3 AWS services: S3 for object storage, EC2 for virtual servers & RDS for managed relational databases.

Top 3 AWS services: S3 for object storage, EC2 for virtual servers & RDS for managed relational databases.

Configure AWS S3 for Django project using boto3 & django-storages. Install packages, update settings.py, add AWS config, create S3 bucket & set permissions, collect static files & test media uploads.

Git keywords key areas covered: config, repository creation, changes, undoing, remote repos, branching & merging, and Git flow.

CI/CD pipeline automates software delivery: source control, build, test, deploy & monitor. Reduces manual errors, improves feedback loops & enables faster iterations.

Set up a simple CI/CD pipeline for Node.js projects with GitHub Actions on Windows in 7 steps.

useState & useEffect: Manage state & side effects in React! useState returns [state, setState] while useEffect runs a function on dependency changes, simplifying state management & handling side effects.

Develop with Docker: Write code, create a Dockerfile, build an image, run a container, test, push/pull images for consistent deployment across environments.

Implementing JWT auth with Node.js using express, bcryptjs, jsonwebtoken & mongoose for secure user registration, login & protected routes.

Master Docker & Kubernetes with our 6-step roadmap! Learn containers, images, & Dockerfile basics, then move on to Pods, services, & deployments in Kubernetes. Practice CI/CD pipelines & explore advanced orchestration concepts.

ES6 introduced new syntax improvements to JavaScript, including let/const keywords, arrow functions, template literals, destructuring assignment & more.

SQL Query Processing Order: FROM (data source selection), WHERE (row filtering), GROUP BY, HAVING, SELECT, DISTINCT, ORDER BY, LIMIT/OFFSET. Visualize this process to optimize your queries!

Extract data from orders table, transform by calculating total revenue per customer, load into customer_revenue table using SQL.