SQL 50 Leetcode
About Course
About the Course
Master SQL with real-world coding challenges! Our SQL 50 LeetCode Course is designed to help you sharpen your SQL skills by solving 50 hand-picked LeetCode-style problems, ranging from beginner to advanced levels. Whether you’re preparing for technical interviews, working on data-related projects, or aiming to become a SQL expert, this course will give you the hands-on experience you need.
What You’ll Learn:
Essential SQL concepts (JOINs, GROUP BY, Subqueries, etc.) Advanced techniques (Window Functions, CTEs, Optimization) How to approach and solve SQL interview questions efficiently Real-world SQL applications used by top tech companies
Why Choose This Course?
Structured Learning: A step-by-step approach to solving problems
Hands-On Practice: Solve real SQL challenges with guided explanations
Interview Focused: Tackle the most commonly asked SQL questions
Boost Your Confidence: Improve your problem-solving speed & accuracy
Ready to level up your SQL skills? Enroll now and start coding!
What Will You Learn?
- By the end of this course, you'll have mastered SQL problem-solving and be fully prepared for technical interviews and real-world database challenges.
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SQL Fundamentals & Querying
- Write complex SELECT queries with filtering and sorting
- Use GROUP BY and aggregate functions effectively
- Apply HAVING, DISTINCT, and CASE statements
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Joins & Data Relationships
- Master INNER, LEFT, RIGHT, and FULL JOINs
- Work with self-joins and cross joins
- Understand primary keys, foreign keys, and normalization
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Advanced SQL Techniques
- Optimize queries using subqueries and CTEs
- Implement window functions (ROW_NUMBER, RANK, DENSE_RANK)
- Use string, date, and math functions in SQL
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Performance Optimization & Best Practices
- Improve SQL query speed using indexes and execution plans
- Handle large datasets efficiently
- Learn best practices for writing clean and maintainable SQL
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SQL Interview & LeetCode Mastery
- Solve 50+ real-world SQL challenges
- Identify common SQL patterns used in tech interviews
- Gain confidence in tackling data-related coding tests
- By the end of the course, you'll be equipped with the skills needed to crack SQL interviews, optimize databases, and work on real-world projects.
Course Content
SQL 50 Leetcode
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01.Recyclable and Low fat products
01:31 -
02.Find Customer Referee
02:37 -
03.Big Countries
01:40 -
04.Article Views
01:40 -
05.Invalid Tweets
01:31 -
06.Replace Employee ID With The Unique Identifier
01:32 -
07.Product Sales Analysis I
01:56 -
08.Customer Who Visited but Did Not Make Any Transactions
02:58 -
09.Rising Temperature
02:10 -
10.Average Time of Process per Machine
05:34 -
11.Employee Bonus
01:49 -
12.Students and Examinations
04:49 -
13.Managers with at Least 5 Direct Reports
02:40 -
14.Confirmation Rate
04:27 -
15.Not Boring Movies
01:32 -
16.Average Selling Price
04:44 -
17.Project Employees I
02:38 -
18.Percentage of Users Attended a Contest
04:09 -
19.Queries Quality and Percentage
04:07 -
20.Monthly Transactions I
06:37 -
21.Immediate Food Delivery II
04:27 -
22.Game Play Analysis IV
03:59 -
23.Number of Unique Subjects Taught by Each Teacher
01:29 -
24.User Activity for the Past 30 Days
03:36 -
25.Product Sales Analysis III
03:44 -
26.Classes More Than 5 Students
01:09 -
27.Find Followers Count
01:34 -
28.Biggest Single Number
01:35 -
29.Customers Who Bought All Products
02:14 -
30.The Number of Employees Which Report to Each Employee
05:47 -
31.Primary Department for Each Employee
03:03 -
32.Triangle Judgement
02:58 -
33.Consecutive Numbers
03:33 -
34.Product Price at a Given Date
07:10 -
35.Last Person to Fit in the Bus
02:06 -
36.Count Salary Categories
02:29 -
37.Employees Whose Manager Left the Company
02:20 -
38.Exchange Seats
03:26 -
39.Movie Rating
06:14 -
40.Restaurant Growth
07:29 -
41.Friend Requests II
02:33 -
42.Investments in 2016
04:15 -
43.Department Top Three Salaries
04:39 -
44.Fix Names in a Table
02:18 -
45.Patients With a Condition
01:46 -
46.Delete Duplicate Emails
01:59 -
47.Second Highest Salary
01:49 -
48.Group Sold Products By The Date
02:25 -
49.List the Products Ordered in a Period
03:29 -
50.Find Users With Valid E-Mails
02:42