SQL Programming Resources

Open in Telegram

Find top SQL resources from global universities, cool projects, and learning materials for data analytics. Admin: @coderfun Useful links: heylink.me/DataAnalytics Promotions: @love_data

Network:Data Analytics India4 375 Technologies & Applications1 687...

📈 Analytical overview of Telegram channel SQL Programming Resources

Channel SQL Programming Resources (@sqlanalyst) in the English language segment is an active participant. Currently, the community unites 75 783 subscribers, ranking 1 687 in the Technologies & Applications category and 4 375 in the India region.

📊 Audience metrics and dynamics

Since its creation on невідомо, the project has demonstrated rapid growth, gathering an audience of 75 783 subscribers.

According to the latest data from 05 June, 2026, the channel demonstrates stable activity. Although there has been a change in the number of participants by 516 over the last 30 days and by 48 over the last 24 hours, overall reach remains high.

Verification status: Not verified
Engagement rate (ER): The average audience engagement rate is 3.24%. Within the first 24 hours after publication, content typically collects 1.21% reactions from the total number of subscribers.
Post reach: On average, each post receives 2 456 views. Within the first day, a publication typically gains 918 views.
Reactions and interaction: The audience actively supports content: the average number of reactions per post is 3.
Thematic interests: Content is focused on key topics such as row, sql, customer_id, logic, desc.

📝 Description and content policy

The author describes the resource as a platform for expressing subjective opinions:
“Find top SQL resources from global universities, cool projects, and learning materials for data analytics. Admin: @coderfun Useful links: heylink.me/DataAnalytics Promotions: @love_data”

Thanks to the high frequency of updates (latest data received on 06 June, 2026), the channel maintains relevance and a high level of publication reach. Analytics show that the audience actively interacts with content, making it an important point of influence in the Technologies & Applications category.

75 783

Subscribers

+4824 hours

+1687 days

+51630 days

2 456

Post views

~ 91824 hours

~ 1 25148 hours

3.24%

Engagement rate

~ 2

Posts per day

Ads index

beta

Posts Archive

75 783

What will this query return? SELECT REPLACE('I love Java', 'Java', 'SQL');

Anonymous voting

75 783

Which function removes extra spaces from text?

Anonymous voting

75 783

What does CONCAT() do in SQL?

Anonymous voting

75 783

Which function converts text to uppercase?

Anonymous voting

75 783

🚀 𝗣𝗮𝘆 𝗔𝗳𝘁𝗲𝗿 𝗣𝗹𝗮𝗰𝗲𝗺𝗲𝗻𝘁 | 𝗚𝗲𝘁 𝗛𝗶𝗿𝗲𝗱 𝗶𝗻 𝗧𝗼𝗽 𝗧𝗲𝗰𝗵 𝗖𝗼𝗺𝗽𝗮𝗻𝗶𝗲𝘀! 💼🔥 Master the most in-demand tech skills and kickstart your career with industry-leading training. 🎯 Program Highlights: ✅ Learn Coding from Industry Experts ✅ Real-World Projects & Interview Preparation ✅ Dedicated Placement Support ✅ Avg. Package: ₹7.2 LPA ✅ Highest Package: ₹41 LPA 🚀 🎓 Perfect for Freshers, Students & Career Switchers 𝐑𝐞𝐠𝐢𝐬𝐭𝐞𝐫 𝐍𝐨𝐰 👇:- https://pdlink.in/42WOE5H Hurry! Limited seats are available.🏃‍♂️

75 783

🔥Now, let’s move to the next topic: ✅ SQL String Functions 🧠 1. What are String Functions? String functions are used to 👉 manipulate text data 👉 clean messy data 👉 format outputs Used heavily in: ✔ Data Analytics ✔ Reporting ✔ ETL processes ⚡ 2. Common String Functions Function : Purpose UPPER() : Convert to uppercase LOWER() : Convert to lowercase LENGTH() : Count characters CONCAT() : Join strings SUBSTRING() : Extract part of string TRIM() : Remove spaces REPLACE() : Replace text 🔥 3. UPPER() & LOWER() SELECT UPPER(name) AS upper_name FROM employees; SELECT LOWER(name) AS lower_name FROM employees; 🔥 4. LENGTH() 👉 Count number of characters SELECT name, LENGTH(name) AS total_chars FROM employees; 🔥 5. CONCAT() 👉 Combine strings SELECT CONCAT(first_name, ' ', last_name) AS full_name FROM employees; 🔥 6. SUBSTRING() 👉 Extract part of string SELECT SUBSTRING(name, 1, 3) FROM employees; ✔ Extracts first 3 characters 🔥 7. TRIM() 👉 Remove extra spaces SELECT TRIM(' SQL '); ✔ Result → SQL 🔥 8. REPLACE() 👉 Replace text inside string SELECT REPLACE('I love Java', 'Java', 'SQL'); ✔ Result → I love SQL 🎯 9. Practice Tasks 1. Convert names to uppercase 2. Convert emails to lowercase 3. Combine first & last names 4. Extract first 4 letters of names 5. Remove extra spaces from city names ⚡ Mini Challenge 🔥 👉 Create employee usernames using: first 3 letters of name + employee ID Example: Amit + 101 → Ami101 🔥 Mini Challenge Solution 💯 👉 Requirement: Create username using: • First 3 letters of name • Employee ID Example: Amit + 101 → Ami101 ✅ SQL Solution SELECT name, emp_id, CONCAT(SUBSTRING(name, 1, 3), emp_id) AS username FROM employees; ✅ Example Output name : emp_id : username Amit : 101 : Ami101 Neha : 102 : Neh102 Ravi : 103 : Rav103 🧠 How It Works 👉 SUBSTRING(name, 1, 3) Extracts first 3 letters 👉 CONCAT() Combines extracted text with employee ID 🔥 Real-World Usage: String functions are commonly used for: 👉 Username generation 👉 Email formatting 👉 Data cleaning 👉 Customer IDs 💯 Double Tap ❤️ For More

75 783

🚀 𝗧𝗖𝗦 𝗙𝗥𝗘𝗘 𝗖𝗲𝗿𝘁𝗶𝗳𝗶𝗰𝗮𝘁𝗶𝗼𝗻 𝗖𝗼𝘂𝗿𝘀𝗲𝘀 𝟮𝟬𝟮𝟲 – 𝗘𝗻𝗿𝗼𝗹𝗹 𝗡𝗼𝘄! TCS iON is offering FREE certification courses to help students, freshers & professionals build job-ready skills from home 🌍 ✅ 100% Free Online Courses ✅ Free Verified Certificates ✅ Self-Paced Learning ✅ Beginner-Friendly Programs ✅ Learn from TCS Industry Experts 🔗 𝗘𝗻𝗿𝗼𝗹𝗹 𝗙𝗼𝗿 𝗙𝗥𝗘𝗘👇: https://pdlink.in/4nTGSDh 🔥 Excellent opportunity to gain valuable certifications from one of India’s top IT companies completely FREE.

75 783

🔥 Now, Let’s move to the next topic: ✅ UNION & UNION ALL in SQL 🧠 1. What is UNION? UNION is used to combine results from multiple SELECT queries. "Merge data from two tables into one result.” ⚡ 2. Rules for UNION ✔ Same number of columns ✔ Same datatype/order of columns 📊 Example Tables 👨‍💼 employees₂024 name • Amit • Neha 👨‍💼 employees₂025 name • Ravi • Neha 🔥 3. UNION Example

SELECT name FROM employees_2024
UNION
SELECT name FROM employees_2025;

✔ Removes duplicates automatically ✅ Result name • Amit • Neha • Ravi ⚡ 4. UNION ALL

SELECT name FROM employees_2024
UNION ALL
SELECT name FROM employees_2025;

✔ Keeps duplicates ✔ Faster than UNION ✅ Result name • Amit • Neha • Ravi • Neha 🔥 5. UNION vs UNION ALL UNION • Removes duplicates • Slower • Doesn't keep all rows UNION ALL • Doesn't remove duplicates • Faster • Keeps all rows ⚡ 6. ORDER BY with UNION

SELECT name FROM employees_2024
UNION
SELECT name FROM employees_2025
ORDER BY name;

🎯 7. Practice Tasks 1. Combine employee names using UNION 2. Combine employee names using UNION ALL 3. Identify duplicate removal 4. Sort UNION result using ORDER BY 5. Compare UNION vs UNION ALL output ⚡ Mini Challenge 🔥 👉 Combine customer names from two branches and keep duplicates 🔥 Mini Challenge Solution 💯 👉 Since duplicates should remain → use UNION ALL ✅ Example Tables 🏢 branch_a_customers customer_name • Amit • Neha 🏢 branch_b_customers customer_name • Ravi • Neha ✅ SQL Solution

SELECT customer_name
FROM branch_a_customers

UNION ALL

SELECT customer_name
FROM branch_b_customers;

✅ Result customer_name • Amit • Neha • Ravi • Neha ✔ Duplicate Neha is preserved 💯 🧠 Why UNION ALL? 👉 UNION → removes duplicates 👉 UNION ALL → keeps duplicates + faster Double Tap ❤️ For More

75 783

𝗧𝗼𝗽 𝟯 𝗙𝗥𝗘𝗘 𝗣𝘆𝘁𝗵𝗼𝗻 𝗖𝗲𝗿𝘁𝗶𝗳𝗶𝗰𝗮𝘁𝗶𝗼𝗻 𝗖𝗼𝘂𝗿𝘀𝗲𝘀 𝗜𝗻 𝟮𝟬𝟮𝟲! 🚀💻 These FREE certification courses can help you build strong programming skills and stand out from the crowd 👇 ✅ Free Learning Resources ✅ Certificate Opportunities ✅ Beginner Friendly ✅ Boost Your Resume & Tech Skills 🌟 Perfect for students, freshers, aspiring developers, data analysts, and tech enthusiasts. 🔗 𝗘𝗻𝗿𝗼𝗹𝗹 𝗙𝗼𝗿 𝗙𝗥𝗘𝗘👇: https://pdlink.in/43DnP6S 📌 Start learning today and level up your career with Python!

75 783

If you're working with data pipelines, these repositories are very useful: 🚀📊 ibis: A Python API that allows you to write queries once and run them on different data backends, such as DuckDB, BigQuery, and Snowflake. 🐍🔗 https://github.com/ibis-project/ibis pygwalker: Instantly turns a DataFrame into an interactive UI for visual data exploration. 📈🖥️ https://github.com/Kanaries/pygwalker katana: A fast and scalable web crawler, often used for security testing and large-scale data collection/search. 🕷️🔒 https://github.com/projectdiscovery/katana Double Tap ❤️ For More Free Resources

75 783

𝗗𝗮𝘁𝗮 𝗔𝗻𝗮𝗹𝘆𝘁𝗶𝗰𝘀 𝘄𝗶𝘁𝗵 𝗚𝗲𝗻𝗔𝗜 𝗢𝗻𝗹𝗶𝗻𝗲 𝗪𝗲𝗯𝗶𝗻𝗮𝗿 😍 AI is replacing analysts who don't adapt. Learn Data Analytics + GenAI with IBM & Microsoft certifications. Land your dream role with dedicated placement support. 🎓1200+ Hiring Partners. 128% avg hike. 35 LPA Highest CTC in Placements. 💫𝗕𝗼𝗼𝗸 𝘆𝗼𝘂𝗿 𝗙𝗥𝗘𝗘 𝘄𝗲𝗯𝗶𝗻𝗮𝗿 :- https://pdlink.in/4uwBw3q Hurry Up ‍♂️! Limited seats are available.

75 783

What is the purpose of constraints in SQL?

Anonymous voting

75 783

𝗠𝗶𝗰𝗿𝗼𝘀𝗼𝗳𝘁 𝗙𝗥𝗘𝗘 𝗖𝗲𝗿𝘁𝗶𝗳𝗶𝗰𝗮𝘁𝗶𝗼𝗻 𝗖𝗼𝘂𝗿𝘀𝗲𝘀🎓 ✨ Learn In-Demand Tech Skills ✨ Boost Your Resume & LinkedIn Profile ✨ Improve Career Opportunities ✨ Self-Paced Online Learning ✨ Great for Freshers & Students 🔗 𝗘𝗻𝗿𝗼𝗹𝗹 𝗙𝗼𝗿 𝗙𝗥𝗘𝗘👇: https://pdlink.in/49p31Uh 🔥 Start learning today and prepare for high-paying tech careers with Microsoft free certification programs

75 783

🔥 Now, let's move to the next topic: ✅ SQL Constraints Essential for data integrity & important in interviews 💯 🧠 1. What are Constraints in SQL? Constraints are rules applied on table columns 👉 to maintain accurate & valid data Think like this 👇 👉 “Database safety rules” ⚡ 2. Why Use Constraints? ✔ Prevent invalid data ✔ Maintain consistency ✔ Improve data integrity ✔ Enforce relationships 📊 Types of Constraints NOT NULL • Purpose: Prevent NULL values UNIQUE • Purpose: No duplicate values PRIMARY KEY • Purpose: Unique identifier FOREIGN KEY • Purpose: Create relationship CHECK • Purpose: Apply condition DEFAULT • Purpose: Set default value 🔥 3. NOT NULL Constraint 👉 Column cannot contain NULL

CREATE TABLE employees (
    emp_id INT,
    name VARCHAR(50) NOT NULL
);

🔥 4. UNIQUE Constraint 👉 Prevent duplicate values

CREATE TABLE users (
    email VARCHAR(100) UNIQUE
);

🔥 5. PRIMARY KEY 👉 Unique + NOT NULL

CREATE TABLE employees (
    emp_id INT PRIMARY KEY,
    name VARCHAR(50)
);

✔ Every row must have unique emp_id 🔥 6. FOREIGN KEY 👉 Creates relationship between tables

CREATE TABLE employees (
    emp_id INT PRIMARY KEY,
    dept_id INT,
    FOREIGN KEY (dept_id)
    REFERENCES departments(dept_id)
);

✔ dept_id must exist in departments table 🔥 7. CHECK Constraint 👉 Restrict values using condition

CREATE TABLE employees (
    salary INT CHECK (salary > 0)
);

✔ Salary cannot be negative 🔥 8. DEFAULT Constraint 👉 Assign default value automatically

CREATE TABLE employees (
    city VARCHAR(50) DEFAULT 'Pune'
);

🎯 9. Practice Tasks 1. Create table using PRIMARY KEY 2. Add UNIQUE constraint on email 3. Create FOREIGN KEY relationship 4. Use CHECK for salary > 0 5. Add DEFAULT city value ⚡ Mini Challenge 🔥 👉 Create students table with: • student_id → PRIMARY KEY • email → UNIQUE • age > 18 using CHECK • city default = 'Mumbai' Double Tap ❤️ For More

75 783

𝗔𝗜 & 𝗠𝗟 𝗖𝗲𝗿𝘁𝗶𝗳𝗶𝗰𝗮𝘁𝗶𝗼𝗻 𝗣𝗿𝗼𝗴𝗿𝗮𝗺 𝗯𝘆 𝗖𝗖𝗘, 𝗜𝗜𝗧 𝗠𝗮𝗻𝗱𝗶😍 Freshers get 15 LPA Average Salary with AI & ML Skills! - Eligibility: Open to everyone - Duration: 6 Months - Program Mode: Online - Taught By: IIT Mandi Professors 90% Resumes without AI + ML skills are being rejected. 𝗔𝗽𝗽𝗹𝘆 𝗡𝗼𝘄👇 :- https://pdlink.in/4nmI024 Get Placement Assistance With 5000+ Companies

75 783

Which statement is TRUE?

Anonymous voting

75 783

Which systems commonly use denormalization?

Anonymous voting

75 783

What is a disadvantage of denormalization?

Anonymous voting

75 783

What is the main advantage of denormalization?

Anonymous voting

75 783

What is denormalization?

Anonymous voting