@Codingdidi
9.18K subscribers
26 photos
7 videos
47 files
260 links
Free learning Resources For Data Analysts, Data science, ML, AI, GEN AI and Job updates, career growth, Tech updates
Download Telegram
Don't Limit Yourself to Just One Title, "๐ƒ๐š๐ญ๐š ๐€๐ง๐š๐ฅ๐ฒ๐ฌ๐ญ" in Your Job Search!


Don't get caught up in the confines of a single job title! There are countless roles out there that might align perfectly with your skills and interests. Here are a few alternative titles for data analyst roles to broaden your search horizons:


1. QI Analyst
2. Risk Analyst
3. Data Modeler
4. Research Analyst
5. Business Analyst
6. Reporting Analyst
7. Operations Analyst
8. Social Media Analyst
9. Statistical Analyst
10. Statistical Analyst
11. Product Data Analyst
12. Analytics Engineer
13. Supply Chain Analyst
14. Data Mining Engineer
15. Data Science Associate
16. Financial Data Analyst
17. Cybersecurity Analyst
18. Marketing Data Analyst
19. Quantitative Analyst
20. HR Analytics Specialist
21. Decision Support Analyst
22. Machine Learning Analyst
23. Fraud Detection Analyst
24. Healthcare Data Analyst
25. Data Insights Specialist
26. Data Visualization Specialist
27. Customer Insights Analyst
28. Business Intelligence Analyst
29. Predictive Analytics Analyst

Remember, the right opportunity might be hiding behind a different title than you expect. Keep an open mind and explore all avenues in your job search journey!

Also, there might be fewer applicants for these roles as many don't search for titles other than data Analyst or Business Analyst. Maybe you can get more calls or interviews this way.

You don't have to try all the titles, filter out based on your interests and skills!

After all, ๐‰๐จ๐› ๐ƒ๐ž๐ฌ๐œ๐ซ๐ข๐ฉ๐ญ๐ข๐จ๐ง ๐ฆ๐š๐ญ๐ญ๐ž๐ซ๐ฌ ๐ฆ๐จ๐ซ๐ž ๐ญ๐ก๐š๐ง ๐ญ๐ก๐ž ๐ญ๐ข๐ญ๐ฅ๐ž!! ๐Ÿ˜‰

like for moreโค๏ธ
๐Ÿ‘9โค4๐Ÿ‘1
๐Ÿ‘3
Societe Generale is hiring!
Position: Analyst
Qualifications: Bachelorโ€™s/ Master's Degree
Salary: 4 - 7 LPA (Expected)
Experience: Entry Level
Location: Bangalore, India (Hybrid)

๐Ÿ“ŒApply Now: https://careers.societegenerale.com/en/job-offers/analyst-24000PV0-en?src=JB-14381
๐Ÿ‘1
7 Best GitHub Repositories to Break into Data Analytics and Data Science

If you're diving into data science or data analytics, these repositories will give you the edge you need. Check them out:

1๏ธโƒฃ 100-Days-Of-ML-Code
๐Ÿ”— https://github.com/Avik-Jain/100-Days-Of-ML-Code
โญ๏ธ Stars: ~42k

2๏ธโƒฃ awesome-datascience
๐Ÿ”— https://github.com/academic/awesome-datascience
โญ๏ธ Stars: ~22.7k

3๏ธโƒฃ Data-Science-For-Beginners
๐Ÿ”— https://github.com/microsoft/Data-Science-For-Beginners
โญ๏ธ Stars: ~14.5k

4๏ธโƒฃ data-science-interviews
๐Ÿ”— https://github.com/alexeygrigorev/data-science-interviews
โญ๏ธ Stars: ~5.8k

5๏ธโƒฃ Coding and ML System Design
๐Ÿ”— https://github.com/weeeBox/coding-and-ml-system-design
โญ๏ธ Stars: ~3.5k

6๏ธโƒฃ Machine Learning Interviews from MAANG
๐Ÿ”— https://github.com/arunkumarpillai/Machine-Learning-Interviews
โญ๏ธ Stars: ~8.1k

7๏ธโƒฃ data-science-ipython-notebooks
๐Ÿ”— https://github.com/donnemartin/data-science-ipython-notebooks
โญ๏ธ Stars: ~27.2k

Explore these amazing resources and take your data science journey to the next level! ๐Ÿš€
#DataScience #DataAnalytics #GitHub #MachineLearning #CodingSkills
๐Ÿ‘3โค2
if you're a data analyst.

you need to clean data as your job

This is how you should learn data cleaning for 2025:
โœ…Learn how to handle missing values
โœ…Learn data normalization and standardization
โœ…Learn to remove duplicates
โœ…Learn how to handle outliers
โœ…Learn how to merge and join datasets
โœ…Learn to identify and correct data inconsistencies

Data cleaning is an essential step to make your analysis meaningful.
โค3๐Ÿ‘2
THOMSON REUTERS is Hiring for DATA ENGINEER

Role:- DATA ENGINEER

Qualifications:- GRADUATION

Experience:- Fresher's and Experienced

Mode:- WORK FROM OFFICE

CTC:- 15 LPA

Location:- BANGALORE, KARNATAKA & HYDERABAD, TELANGANA

Apply Now:- https://careers.thomsonreuters.com/us/en/job/THTTRUUSJREQ185931EXTERNALENUS/Data-Engineer
๐Ÿ‘1
1. Handling Missing Values
- Kaggle Tutorial: [Handling Missing Values](https://www.kaggle.com/learn/data-cleaning)
- YouTube Video: ["Dealing with Missing Data in Python"](https://www.youtube.com/watch?v=wvsE8jm1GzE) by Data School
- Blog Post: [Complete Guide to Handling Missing Data in Python](https://towardsdatascience.com/complete-guide-to-handling-missing-data-in-python-95c1221fba0e)

---

2. Data Normalization and Standardization
- Blog Post: [Normalization vs. Standardization Explained](https://machinelearningmastery.com/normalize-standardize-machine-learning-data-python/)
- Interactive Course: [Feature Scaling and Normalization (DataCamp)](https://www.datacamp.com/)
- YouTube Video: ["Feature Scaling in Machine Learning"](https://www.youtube.com/watch?v=UvK0B5JZpM8) by StatQuest

---

3. Removing Duplicates
- Official Pandas Documentation: [Pandas drop_duplicates()](https://pandas.pydata.org/pandas-docs/stable/reference/api/pandas.DataFrame.drop_duplicates.html)
- Video: ["Removing Duplicates in Python"](https://www.youtube.com/watch?v=QHRrl4Il2Og) by Corey Schafer
- Blog Post: [How to Remove Duplicates Using Python](https://realpython.com/python-data-cleaning-numpy-pandas/)

---

4. Handling Outliers
- Blog Post: [5 Methods to Deal with Outliers in Data](https://towardsdatascience.com/handling-outliers-in-your-data-7cde6b4d76bb)
- Video: ["Identifying and Handling Outliers in Python"](https://www.youtube.com/watch?v=TN-xVNUcDk8) by Krish Naik
- Jupyter Notebook Example: [Outlier Detection with Python](https://github.com/datascience-projects)

---

5. Merging and Joining Datasets
- Pandas Documentation: [Merging, Joining, and Concatenating](https://pandas.pydata.org/pandas-docs/stable/user_guide/merging.html)
- Video: ["Pandas Merging and Joining"](https://www.youtube.com/watch?v=g7n1MKo7WgQ) by Corey Schafer
- Interactive Course: [Data Manipulation with Pandas (DataCamp)](https://www.datacamp.com/)

---

6. Identifying and Correcting Data Inconsistencies
- Blog Post: [Python for Data Cleaning](https://towardsdatascience.com/python-for-data-cleaning-a-step-by-step-guide-to-deal-with-data-inconsistencies-c08f06fca8c8)
- Video Tutorial: ["Python for Data Cleaning"](https://www.youtube.com/watch?v=B_L0v1xRb6E)
- Project-Based Learning: [Data Cleaning in Python Mini-Projects](https://github.com/topics/data-cleaning)

---

๐Ÿ’ก Pro Tip: Practice real-world data cleaning tasks using open datasets on platforms like:
- [Kaggle Datasets](https://www.kaggle.com/datasets)
- [Data World](https://data.world/)
- [UCI Machine Learning Repository](https://archive.ics.uci.edu/ml/index.php)
โค3๐Ÿ‘3
๐‘๐ž๐ฏ๐จ๐ฅ๐ฎ๐ญ - ๐–๐จ๐ซ๐ค ๐…๐ซ๐จ๐ฆ ๐‡๐จ๐ฆ๐ž
Position: Business Analyst
Qualification: Bachelor's/ Master's Degree
Salary: 5 - 8 LPA (Expected)
Experienc๏ปฟe: Freshers/ Experienced
Location: Work From Home (Remote)

๐Ÿ“ŒApply Now: https://www.revolut.com/careers/position/75445311-c0e0-4b6d-90d4-d4a23226831c/
๐Ÿ‘1
100 Data science concepts.pdf
2.9 MB
100 Data science concept
โค2
python cheetsheet.pdf
2.4 MB
*Python*
โœ… High-Level & Easy to Learn โ€“ Simple syntax, readable code, and beginner-friendly.

โœ… Interpreted Language โ€“ No need for compilation; executed line by line.

โœ… Dynamically Typed โ€“ No need to declare variable types; Python determines them at runtime.

โœ… Versatile & Multi-Purpose โ€“ Used in Web Development, Data Science, AI, ML, Automation, Cybersecurity, and more.

โœ… Extensive Libraries & Frameworks โ€“ Supports TensorFlow, NumPy, Pandas, Flask, Django, OpenCV, etc.

โœ… Object-Oriented & Functional โ€“ Supports both OOP and functional programming paradigms.

โœ… Cross-Platform โ€“ Runs on Windows, macOS, Linux, and even mobile devices.

โœ… Large Community & Support โ€“ One of the most widely used languages with extensive documentation and forums.

โœ… Automation & Scripting โ€“ Ideal for task automation, web scraping, and workflow management.

โœ… Strong Integration โ€“ Works with C, C++, Java, SQL, and various APIs.
๐Ÿ‘4
Learn SQL from basic to advanced level in 30 days

Week 1: SQL Basics

Day 1: Introduction to SQL and Relational Databases

Overview of SQL Syntax

Setting up a Database (MySQL, PostgreSQL, or SQL Server)


Day 2: Data Types (Numeric, String, Date, etc.)

Writing Basic SQL Queries:

SELECT, FROM

Day 3: WHERE Clause for Filtering Data

Using Logical Operators:

AND, OR, NOT

Day 4: Sorting Data: ORDER BY

Limiting Results: LIMIT and OFFSET

Understanding DISTINCT

Day 5: Aggregate Functions:

COUNT, SUM, AVG, MIN, MAX


Day 6: Grouping Data: GROUP BY and HAVING

Combining Filters with Aggregations


Day 7: Review Week 1 Topics with Hands-On Practice

Solve SQL Exercises on platforms like HackerRank, LeetCode, or W3Schools


Week 2: Intermediate SQL

Day 8: SQL JOINS:

INNER JOIN, LEFT JOIN

Day 9: SQL JOINS Continued: RIGHT JOIN, FULL OUTER JOIN, SELF JOIN

Day 10: Working with NULL Values

Using Conditional Logic with CASE Statements

Day 11: Subqueries: Simple Subqueries (Single-row and Multi-row)

Correlated Subqueries

Day 12: String Functions:

CONCAT, SUBSTRING, LENGTH, REPLACE

Day 13: Date and Time Functions: NOW, CURDATE, DATEDIFF, DATEADD

Day 14: Combining Results: UNION, UNION ALL, INTERSECT, EXCEPT

Review Week 2 Topics and Practice

Week 3: Advanced SQL

Day 15: Common Table Expressions (CTEs)

WITH Clauses and Recursive Queries

Day 16: Window Functions:

ROW_NUMBER, RANK, DENSE_RANK, NTILE

Day 17: More Window Functions:

LEAD, LAG, FIRST_VALUE, LAST_VALUE


Day 18: Creating and Managing Views

Temporary Tables and Table Variables

Day 19: Transactions and ACID Properties

Working with Indexes for Query Optimization

Day 20: Error Handling in SQL

Writing Dynamic SQL Queries


Day 21: Review Week 3 Topics with Complex Query Practice

Solve Intermediate to Advanced SQL Challenges



Week 4: Database Management and Advanced Applications

Day 22: Database Design and Normalization:

1NF, 2NF, 3NF


Day 23: Constraints in SQL:
PRIMARY KEY, FOREIGN KEY, UNIQUE, CHECK, DEFAULT


Day 24: Creating and Managing Indexes

Understanding Query Execution Plans

Day 25: Backup and Restore Strategies in SQL

Role-Based Permissions

Day 26: Pivoting and Unpivoting Data

Working with JSON and XML in SQL

Day 27: Writing Stored Procedures and Functions

Automating Processes with Triggers

Day 28: Integrating SQL with Other Tools (e.g., Python, Power BI, Tableau)

SQL in Big Data: Introduction to NoSQL

Day 29: Query Performance Tuning:

Tips and Tricks to Optimize SQL Queries


Day 30: Final Review of All Topics

Attempt SQL Projects or Case Studies (e.g., analyzing sales data, building a reporting dashboard)

Since SQL is one of the most essential skill for data analysts, I have decided to teach each topic daily in this channel for free.

Like this post if you want me to continue this SQL series ๐Ÿ‘โ™ฅ๏ธ


Hope it helps:)
๐Ÿ‘21โค7๐Ÿ‘1
Should I continue this SQL series on a daily basis?
Anonymous Poll
97%
YES
3%
NO
๐Ÿ‘4
DA charts.pdf
607.4 KB
๐Ÿš€ Master Data Visualization & Charts for Data Analysis!

Want to make your data analysis more insightful with stunning visualizations? ๐Ÿ“Šโœจ Learn how to use charts, graphs, and dashboards to uncover hidden patterns and tell compelling data stories!

Turn your raw data into clear, meaningful, and powerful visual insights today! ๐Ÿ”ฅ
๐Ÿ”ฅ4๐Ÿ‘2
Day 1: Introduction to SQL and Relational Databases

Welcome to Day 1 of your SQL learning journey! ๐Ÿš€

SQL (Structured Query Language) is the language of databases and is widely used for managing and analyzing data. Whether you're aiming for a career in Data Science, Data Analysis, Web Development, or Finance, SQL is an essential skill to master.

---

๐Ÿ“Œ What is SQL?
SQL stands for Structured Query Language and is used to communicate with databases. It helps you store, retrieve, manipulate, and manage data in a structured way.

Imagine a library database where details of books (title, author, genre, availability) are stored in tables. With SQL, you can:
โœ… Find a book by its title
โœ… Get a list of all books by a specific author
โœ… Check how many books are available in a genre
โœ… Add new books to the library collection
โœ… Delete outdated records

---

๐Ÿ“Œ What is a Database?
A database is an organized collection of data that allows easy access, management, and updating.

There are two main types of databases:
1๏ธโƒฃ Relational Databases (RDBMS): Data is stored in tables (like Excel). Examples: MySQL, PostgreSQL, SQL Server, SQLite.
2๏ธโƒฃ Non-Relational Databases (NoSQL): Data is stored in key-value pairs, JSON, or documents. Examples: MongoDB, Firebase.

SQL works with Relational Databases (RDBMS).

---
๐Ÿ“Œ What is a Table?
A table is like a spreadsheet in Excel, with rows and columns.

๐Ÿ“Œ Example: A simple "Students" table

| Student_ID | Name | Age | Grade |
|------------|-------|-----|--------|
| 1 | Alex | 18 | A |
| 2 | Emma | 19 | B |
| 3 | John | 18 | A |

Each row represents a student, and each column stores a specific type of data (ID, Name, Age, Grade).

---

๐Ÿ“Œ SQL Commands Overview
SQL has different types of commands to manage data:

๐Ÿ”น Data Query Language (DQL) โ€“ Used for fetching data
๐Ÿ”ธ SELECT โ€“ Retrieve data from tables

๐Ÿ”น Data Manipulation Language (DML) โ€“ Used for modifying data
๐Ÿ”ธ INSERT โ€“ Add new data
๐Ÿ”ธ UPDATE โ€“ Modify existing data
๐Ÿ”ธ DELETE โ€“ Remove data

๐Ÿ”น Data Definition Language (DDL) โ€“ Used for creating and modifying tables
๐Ÿ”ธ CREATE TABLE โ€“ Create a new table
๐Ÿ”ธ ALTER TABLE โ€“ Modify table structure
๐Ÿ”ธ DROP TABLE โ€“ Delete a table

๐Ÿ”น Data Control Language (DCL) โ€“ Used for user permissions
๐Ÿ”ธ GRANT โ€“ Give permissions
๐Ÿ”ธ REVOKE โ€“ Remove permissions

๐Ÿ”น Transaction Control Language (TCL) โ€“ Used for managing transactions
๐Ÿ”ธ COMMIT โ€“ Save changes permanently
๐Ÿ”ธ ROLLBACK โ€“ Undo changes

---

๐Ÿ“Œ Setting Up a Database
To practice SQL, you need a database environment. You can use:

1๏ธโƒฃ Online SQL Editors โ€“ No installation needed
- [SQL Fiddle](http://sqlfiddle.com/)
- [W3Schools SQL Editor](https://www.w3schools.com/sql/trysql.asp?filename=trysql_select_all)

2๏ธโƒฃ Install a Database Software
- MySQL (Popular for beginners) โ€“ [Download](https://www.mysql.com/downloads/)
- PostgreSQL (Advanced features) โ€“ [Download](https://www.postgresql.org/download/)
- SQL Server (Used in enterprises) โ€“ [Download](https://www.microsoft.com/en-us/sql-server/sql-server-downloads)

---

๐Ÿ“Œ Writing Your First SQL Query
Letโ€™s retrieve all data from a Students table using the SELECT statement.

SELECT * FROM Students;

Explanation:
- SELECT โ†’ Tells SQL to retrieve data
- * โ†’ Means "all columns"
- FROM Students โ†’ Specifies the table name

---
๐ŸŽฏ Task for Today
1๏ธโƒฃ Understand the basic SQL commands mentioned above.
2๏ธโƒฃ Try an online SQL editor and execute SELECT * FROM Students;
3๏ธโƒฃ Install MySQL or PostgreSQL (optional, but recommended).

---

๐Ÿ“Œ Thatโ€™s it for Day 1! Tomorrow, weโ€™ll learn about SQL Data Types and start writing basic queries. ๐Ÿš€

๐Ÿ’ก Like & comment if you're excited to continue this series! ๐Ÿ˜Šโค๏ธ
๐Ÿ‘15๐Ÿ”ฅ5
Day 2: SQL Data Types and Writing Basic Queries

Welcome to Day 2 of your SQL learning journey! ๐ŸŽ‰

Today, weโ€™ll cover two important topics:
โœ… Data Types in SQL โ€“ Understanding different types of data in a database
โœ… Writing Basic SQL Queries โ€“ Learning how to retrieve data using SQL

By the end of this lesson, youโ€™ll be able to create a table and write your first SQL query to fetch data! ๐Ÿš€

---

๐Ÿ“Œ What Are Data Types in SQL?
A data type defines the kind of data a column can store. Each column in a table must have a specific data type to ensure that data is stored correctly.

For example, a "Name" column should store text, while an "Age" column should store numbers.

---

๐Ÿ“Œ Common SQL Data Types (MySQL, PostgreSQL, SQL Server)

1๏ธโƒฃ Numeric Data Types (Used for storing numbers)
| Data Type | Description | Example |
|-----------|------------|---------|
| INT | Stores whole numbers | 25, 100, -50 |
| DECIMAL(p, s) | Stores decimal numbers with precision | 12.34, 99.99 |
| FLOAT / REAL | Stores floating-point numbers | 1.23, 3.14 |

๐Ÿ”น Example: If youโ€™re storing student ages, use INT. If youโ€™re storing bank balances, use DECIMAL.

---

2๏ธโƒฃ String (Text) Data Types
| Data Type | Description | Example |
|-----------|------------|---------|
| CHAR(n) | Fixed-length string (n characters) | 'A', 'USA' |
| VARCHAR(n) | Variable-length string (up to n characters) | 'John Doe', 'Hello World' |
| TEXT | Large text data | 'This is a long description...' |

๐Ÿ”น Example: A column storing names should be VARCHAR(50), meaning it can hold up to 50 characters.

---

3๏ธโƒฃ Date and Time Data Types
| Data Type | Description | Example |
|-----------|------------|---------|
| DATE | Stores only the date (YYYY-MM-DD) | '2025-02-02' |
| TIME | Stores only the time (HH:MM:SS) | '14:30:00' |
| DATETIME | Stores both date and time | '2025-02-02 14:30:00' |
| TIMESTAMP | Stores date & time (used for logging) | '2025-02-02 14:30:00' |

๐Ÿ”น Example: If youโ€™re storing a studentโ€™s birth date, use DATE. If youโ€™re storing when a student logged in, use DATETIME.

---

๐Ÿ“Œ Creating a Table in SQL
Now that we understand data types, letโ€™s create a table for our students.

CREATE TABLE Students (
Student_ID INT PRIMARY KEY,
Name VARCHAR(50),
Age INT,
Grade CHAR(1),
Enrollment_Date DATE
);


๐Ÿ”น Explanation:
- CREATE TABLE Students โ†’ Creates a table named Students
- Student_ID INT PRIMARY KEY โ†’ Unique ID for each student
- Name VARCHAR(50) โ†’ Stores student names (up to 50 characters)
- Age INT โ†’ Stores student ages
- Grade CHAR(1) โ†’ Stores single-character grades (A, B, C...)
- Enrollment_Date DATE โ†’ Stores the date of enrollment

---

๐Ÿ“Œ Writing Basic SQL Queries
Now, letโ€™s insert some data and retrieve it using SQL queries.

1๏ธโƒฃ Inserting Data into a Table
INSERT INTO Students (Student_ID, Name, Age, Grade, Enrollment_Date)
VALUES (1, 'John Doe', 18, 'A', '2023-09-01');


๐Ÿ”น Explanation:
- INSERT INTO Students โ†’ Adds a new record to the Students table
- (Student_ID, Name, Age, Grade, Enrollment_Date) โ†’ Specifies the columns
- VALUES (1, 'John Doe', 18, 'A', '2023-09-01') โ†’ Provides the values

Now, letโ€™s add a few more students:

INSERT INTO Students (Student_ID, Name, Age, Grade, Enrollment_Date) 
VALUES
(2, 'Emma Smith', 19, 'B', '2022-08-15'),
(3, 'Alex Brown', 20, 'A', '2021-07-10'),
(4, 'Sophia Johnson', 18, 'C', '2023-01-20');


---

2๏ธโƒฃ Retrieving Data Using `SELECT` Statement
To see all student records, use:

SELECT * FROM Students;


๐Ÿ”น Explanation:
- SELECT * โ†’ Selects all columns
- FROM Students โ†’ Specifies the Students table

๐Ÿ”น Output:
| Student_ID | Name | Age | Grade | Enrollment_Date |
|------------|--------------|-----|-------|----------------|
| 1 | John Doe | 18 | A | 2023-09-01 |
| 2 | Emma Smith | 19 | B | 2022-08-15 |
| 3 | Alex Brown | 20 | A | 2021-07-10 |
| 4 | Sophia Johnson| 18 | C | 2023-01-20 |

---
๐Ÿ‘5โค1
3๏ธโƒฃ Retrieving Specific Columns
If you only want to see the Name and Age, run:

SELECT Name, Age FROM Students;


๐Ÿ”น Output:
| Name | Age |
|--------------|----|
| John Doe | 18 |
| Emma Smith | 19 |
| Alex Brown | 20 |
| Sophia Johnson| 18 |

---

4๏ธโƒฃ Filtering Data Using `WHERE` Clause
Find students who are 18 years old:

SELECT * FROM Students WHERE Age = 18;


๐Ÿ”น Output:
| Student_ID | Name | Age | Grade | Enrollment_Date |
|------------|--------------|-----|-------|----------------|
| 1 | John Doe | 18 | A | 2023-09-01 |
| 4 | Sophia Johnson| 18 | C | 2023-01-20 |

---

5๏ธโƒฃ Using Conditions (`AND`, `OR`)
Find students who are 18 years old and have Grade A:

SELECT * FROM Students WHERE Age = 18 AND Grade = 'A';


Find students who are either 18 or 19 years old:

SELECT * FROM Students WHERE Age = 18 OR Age = 19;


---

๐ŸŽฏ Task for Today
1๏ธโƒฃ Understand SQL data types and their usage.
2๏ธโƒฃ Create a Students table in an SQL editor.
3๏ธโƒฃ Insert at least 5 records into your table.
4๏ธโƒฃ Write `SELECT` queries to retrieve:
โœ… All students
โœ… Students aged 18
โœ… Only Name and Age

---

๐Ÿ“Œ Thatโ€™s it for Day 2! Tomorrow, weโ€™ll learn about the WHERE clause and logical operators for filtering data efficiently. ๐Ÿš€

๐Ÿ’ก Like & comment if you're excited for Day 3! ๐Ÿ˜Šโค๏ธ
๐Ÿ‘4โค3
Day 3: Filtering Data Using the `WHERE` Clause and Logical Operators (`AND`, `OR`, `NOT`)

Welcome to Day 3 of your SQL journey! ๐ŸŽ‰

Yesterday, we learned about SQL data types and basic queries using `SELECT`. Today, we will take it further and learn how to filter data using the WHERE clause and logical operators (AND, OR, NOT).

By the end of this lesson, youโ€™ll be able to retrieve specific data based on conditions! ๐Ÿš€

---

๐Ÿ“Œ What is the `WHERE` Clause?

In real-world databases, tables contain thousands or even millions of records. If you only want to find specific data, you need a filtering method.

The WHERE clause allows us to retrieve only the records that match certain conditions instead of displaying the entire table.

๐Ÿ“– Syntax:
SELECT column1, column2, ... 
FROM table_name
WHERE condition;

---

๐Ÿ“Œ Using `WHERE` to Filter Data
Letโ€™s take an example. We have a Students table with the following records:

| Student_ID | Name | Age | Grade | Enrollment_Date |
|------------|--------------|-----|-------|----------------|
| 1 | John Doe | 18 | A | 2023-09-01 |
| 2 | Emma Smith | 19 | B | 2022-08-15 |
| 3 | Alex Brown | 20 | A | 2021-07-10 |
| 4 | Sophia Johnson| 18 | C | 2023-01-20 |

---

1๏ธโƒฃ Filtering Data with `WHERE` Clause

Example 1: Find all students who are 18 years old
SELECT * FROM Students WHERE Age = 18;

๐Ÿ”น Output:
| Student_ID | Name | Age | Grade | Enrollment_Date |
|------------|--------------|-----|-------|----------------|
| 1 | John Doe | 18 | A | 2023-09-01 |
| 4 | Sophia Johnson| 18 | C | 2023-01-20 |

โœ… Explanation:
- The query only selects students where Age = 18.

---

2๏ธโƒฃ Using `AND` Operator

The `AND` operator allows us to filter based on multiple conditions.

Example 2: Find students who are 18 years old AND have Grade A
SELECT * FROM Students WHERE Age = 18 AND Grade = 'A';


๐Ÿ”น Output:
| Student_ID | Name | Age | Grade | Enrollment_Date |
|------------|--------|-----|-------|----------------|
| 1 | John Doe | 18 | A | 2023-09-01 |

โœ… Explanation:
- The query filters students who are both 18 years old AND have Grade A.

---

3๏ธโƒฃ Using `OR` Operator

The `OR` operator allows us to filter if at least one condition is met.

Example 3: Find students who are either 18 OR 19 years old
SELECT * FROM Students WHERE Age = 18 OR Age = 19;


๐Ÿ”น Output:
| Student_ID | Name | Age | Grade | Enrollment_Date |
|------------|--------------|-----|-------|----------------|
| 1 | John Doe | 18 | A | 2023-09-01 |
| 2 | Emma Smith | 19 | B | 2022-08-15 |
| 4 | Sophia Johnson| 18 | C | 2023-01-20 |

โœ… Explanation:
- The query selects students who are either 18 OR 19 years old.

---

4๏ธโƒฃ Using `NOT` Operator

The `NOT` operator helps us find records that do NOT match a certain condition.

Example 4: Find students who are NOT 18 years old
SELECT * FROM Students WHERE NOT Age = 18;


๐Ÿ”น Output:
| Student_ID | Name | Age | Grade | Enrollment_Date |
|------------|-----------|-----|-------|----------------|
| 2 | Emma Smith | 19 | B | 2022-08-15 |
| 3 | Alex Brown | 20 | A | 2021-07-10 |

โœ… Explanation:
- The query excludes students who are 18 years old.

---

๐Ÿ“Œ Combining `AND`, `OR`, and `NOT`

Example 5: Find students who are either Grade A OR Grade B, but NOT 18 years old
SELECT * FROM Students WHERE (Grade = 'A' OR Grade = 'B') AND NOT Age = 18;


๐Ÿ”น Output:
| Student_ID | Name | Age | Grade | Enrollment_Date |
|------------|-----------|-----|-------|----------------|
| 2 | Emma Smith | 19 | B | 2022-08-15 |
| 3 | Alex Brown | 20 | A | 2021-07-10 |

โœ… Explanation:
- The query selects students who have Grade A OR B.
- But it excludes students who are 18 years old.

---

๐Ÿ“Œ Using Comparison Operators with `WHERE`
๐Ÿ‘2โค1
| Operator | Meaning |
|----------|---------|
| = | Equals |
| != or <> | Not Equal |
| > | Greater than |
| < | Less than |
| >= | Greater than or equal to |
| <= | Less than or equal to |

Example 6: Find students older than 18 years
SELECT * FROM Students WHERE Age > 18;

๐Ÿ”น Output:
| Student_ID | Name | Age | Grade | Enrollment_Date |
|------------|-----------|-----|-------|----------------|
| 2 | Emma Smith | 19 | B | 2022-08-15 |
| 3 | Alex Brown | 20 | A | 2021-07-10 |

โœ… Explanation:
- The query selects students who are older than 18.

---

## ๐ŸŽฏ Task for Today
โœ… Write a query to find students who are exactly 19 years old.
โœ… Write a query to find students who are younger than 19.
โœ… Write a query to find students who are either 18 OR 20 years old.
โœ… Write a query to find students who are not Grade A.
โœ… Write a query to find students who are older than 18 AND have Grade B.

---

๐Ÿ” Summary
โœ… WHERE filters records based on a condition.
โœ… AND requires both conditions to be met.
โœ… OR requires at least one condition to be met.
โœ… NOT excludes specific records.
โœ… We can combine multiple conditions using AND, OR, and NOT.

---

๐Ÿ“Œ Thatโ€™s it for Day 3! Tomorrow, weโ€™ll learn about sorting data using `ORDER BY`, limiting results with `LIMIT`, and removing duplicates using `DISTINCT`. ๐Ÿš€


Share with Credit: https://t.me/codingdidi
๐Ÿ’ก Like & comment if you're excited for Day 4! ๐Ÿ˜Šโค๏ธ
๐Ÿ‘4
This is how you can learn everything:

1. 25 minutes of focused learning
2. 5 minutes break
3. 25 minutes of focused learning
4. 25 minutes break minimum
5. Optionally go back to step 1

You can complete this cycle 2 times max per day, and it works wonders.
๐Ÿ‘4๐Ÿ”ฅ1
Hi, all
Your inputs are helping me make this SQL series more informative.
Do comments your inputs. โœ…

Happy Learning ๐Ÿ˜Š