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:

1️⃣ 100-Days-Of-ML-Code
🔗 https://github.com/Avik-Jain/100-Days-Of-ML-Code
⭐️ Stars: ~42k

2️⃣ awesome-datascience
🔗 https://github.com/academic/awesome-datascience
⭐️ Stars: ~22.7k

3️⃣ Data-Science-For-Beginners
🔗 https://github.com/microsoft/Data-Science-For-Beginners
⭐️ Stars: ~14.5k

4️⃣ data-science-interviews
🔗 https://github.com/alexeygrigorev/data-science-interviews
⭐️ Stars: ~5.8k

5️⃣ Coding and ML System Design
🔗 https://github.com/weeeBox/coding-and-ml-system-design
⭐️ Stars: ~3.5k

6️⃣ Machine Learning Interviews from MAANG
🔗 https://github.com/arunkumarpillai/Machine-Learning-Interviews
⭐️ Stars: ~8.1k

7️⃣ data-science-ipython-notebooks
🔗 https://github.com/donnemartin/data-science-ipython-notebooks
⭐️ Stars: ~27.2k

Explore these amazing resources and take your data science journey to the next level! 🚀
#DataScience #DataAnalytics #GitHub #MachineLearning #CodingSkills

Provides a default value for a column when no value is specified.
✔️ Helps in avoiding NULL values in columns where default values make sense.

✅ Example of DEFAULT Constraint

CREATE TABLE Orders (
    OrderID INT PRIMARY KEY,
    CustomerName VARCHAR(50),
    OrderDate DATE DEFAULT CURRENT_DATE
);

✔️ If OrderDate is not provided, it automatically gets the current date.

✅ Inserting Data (Valid Cases)

INSERT INTO Orders (OrderID, CustomerName) VALUES (1, 'Alice'); -- ✅ OrderDate is set to today's date
INSERT INTO Orders (OrderID, CustomerName, OrderDate) VALUES (2, 'Bob', '2025-01-01'); -- ✅ Valid, custom date given

---

🔹 Summary of SQL Constraints

| Constraint | Ensures | Can Be NULL? | Allows Multiple in a Table? |
|--------------|---------------------------------|--------------|--------------------------|
| PRIMARY KEY | Uniqueness & Non-null values | ❌ No | ❌ No (Only One) |
| FOREIGN KEY | Referential Integrity | ✅ Yes (If NULL allowed) | ✅ Yes |
| UNIQUE | Uniqueness (without Primary Key) | ✅ Yes | ✅ Yes |
| CHECK | Enforces condition on values | ✅ Yes | ✅ Yes |
| DEFAULT | Provides a default value | ✅ Yes | ✅ Yes |

---

🔹 Your Task for Today
✅ Create a Students & Courses database using all the constraints.
✅ Try inserting valid & invalid values to see how constraints work.
✅ Comment below if you have any questions! 💬

---

🔹 What’s Next?
Tomorrow, we will learn Creating and Managing Indexes! Stay tuned! 🚀

💡 Like ❤️ & Share if you're enjoying this SQL series! 😊

#DataScience #DataScience #DataAnalytics