SQL Server Interview Question | Master SQL Window Functions | Find Increasing Trends in SQL

🔥 SQL Interview Question - Find Cities Where COVID Cases Are Continuously Increasing! 🔥

In this video, we tackle a real-world SQL interview question using SQL Server's LAG() window function. We analyze COVID case trends across multiple cities and determine which cities had a continuous increase in cases.

📌 What You’ll Learn:
✅ How to use LAG() in SQL Server
✅ Detect trends in time-series data
✅ SQL interview techniques & optimization
✅ Common SQL pitfalls and how to avoid them

👨‍💻 Code Used in the Video:
(Include the SQL query from our previous response here)

💡 Who Should Watch?

SQL Beginners & Intermediate Developers
Data Analysts, Data Engineers & Database Professionals
Anyone preparing for SQL Interviews
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____________________Create Table-------------------------------------------
create table covid(city varchar(50),days date,cases int);

insert into covid values('DELHI','2022-01-01',100);
insert into covid values('DELHI','2022-01-02',200);
insert into covid values('DELHI','2022-01-03',300);

insert into covid values('MUMBAI','2022-01-01',100);
insert into covid values('MUMBAI','2022-01-02',100);
insert into covid values('MUMBAI','2022-01-03',300);

insert into covid values('CHENNAI','2022-01-01',100);
insert into covid values('CHENNAI','2022-01-02',200);
insert into covid values('CHENNAI','2022-01-03',150);

insert into covid values('BANGALORE','2022-01-01',100);
insert into covid values('BANGALORE','2022-01-02',300);
insert into covid values('BANGALORE','2022-01-03',200);
insert into covid values('BANGALORE','2022-01-04',400);

Видео SQL Server Interview Question | Master SQL Window Functions | Find Increasing Trends in SQL канала The Data -Tech Club