View allAll Photos Tagged SQL
La Master Class SQL Server, c'est 5 des meilleurs spécialistes français de SQL Server qui animent chacun un jour complet de workshop sur leur domaine d’expertise. Durant cette semaine exceptionnelle, vous avez l’occasion d’accéder aux connaissances les plus pointues sur l’optimisation et le diagnostic SQL Server, en profitant de l’expérience et de la pédagogie des meilleurs.
Here’s the clean SQL query 👇
SELECT employee_id,
employee_name,
department_id
FROM employees
WHERE department_id IN (
SELECT department_id
FROM departments
WHERE location = 'HYDERABAD'
);
🎯 Explanation:
The subquery executes first and returns a list of department_ids
The outer query filters employees whose department_id matches that list
The subquery is non-correlated (it does not depend on the outer query)
IN is used when the subquery returns multiple values
Clean and easy to read — very common in interviews
✅ Perfect for:
✔️ SQL Interviews
✔️ Backend Developers
✔️ Java + Spring Boot Learners
✔️ Data Analysts
✔️ Reporting & Business Queries
👉 Save this post for SQL revision
👉 Follow @ashokitschool for more SQL + Java + Full Stack content
#SQLInterviewQuestions #SQLTips #INOperator #SubquerySQL #NonCorrelatedSubquery #BackendDeveloper #JavaDeveloper #AshokIT #CodingInterview #LearnSQL #DatabaseConcepts #ProgrammingTips #JobReadySkills #FullStackDeveloper