Mastering SQL for Oracle Fusion HCM – Chapter 17. Fusion HCM SQL Interview Questions and Real-Time Scenarios

 

✅Chapter 17. Fusion HCM SQL Interview Questions and Real-Time Scenarios

Fusion HCM SQL Interview Questions & Real-Time Scenarios

Get prepared with top SQL interview questions and real-world reporting scenarios in Oracle Fusion HCM. Includes query samples and business logic insights.

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🔹 Introduction

Whether you're a report developer, consultant, or analyst, SQL is a key skill in Oracle Fusion HCM. This chapter gives you:

• Common interview questions

• Real-time scenario-based queries

• Best ways to explain your logic

• Tips to handle tricky follow-ups confidently

Let’s dive into what real-world Fusion HCM interviews expect — practical problem-solving with SQL.

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🔹 1. Common Fusion HCM SQL Interview Questions

❓ Q1. How do you fetch the latest assignment record for an employee?

SELECT *
FROM   per_all_assignments_m a
WHERE  a.person_id = :P_PERSON_ID
       AND TRUNC(sysdate) BETWEEN effective_start_date AND effective_end_date
ORDER  BY effective_start_date desc
FETCH first 1 ROWS only 

✅ Tip: Mention usage of effective date filters and row limiting.

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❓ Q2. Write a query to get active employees with their job names.

SELECT ppf.full_name,
       paam.assignment_id,
       pj.job_name
FROM   per_all_people_f ppf,
       per_all_assignments_m paam,
       per_jobs pj
WHERE  TRUNC(SYSDATE) BETWEEN paam.effective_start_date AND
                              paam.effective_end_date
       AND paam.assignment_status_type = 'ACTIVE'
       AND ppf.person_id = paam.person_id
       AND paam.job_id = pj.job_id 

✅ Tip: Emphasize use of JOINs and date-effective logic.

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❓ Q3. How do you handle NULL values in Oracle SQL?

SELECT NVL(email_address, 'Not Provided') AS email
FROM   per_email_addresses 

✅ Tip: Also mention COALESCE, CASE WHEN, and how nulls impact filters.

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❓ Q4. Write a query to count the number of employees per department.

SELECT department_id,
       COUNT(*) AS emp_count
FROM   per_all_assignments_m
WHERE  TRUNC(SYSDATE) BETWEEN effective_start_date AND effective_end_date
GROUP  BY department_id 

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❓ Q5. Explain a performance tuning method for large HCM queries.

• Use indexed columns in WHERE and JOINs

• Avoid SELECT *

• Apply TRUNC(SYSDATE) to reduce partition scan

• Use FETCH FIRST N ROWS ONLY in development

• Use WITH clause (CTE) for modular logic

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🔹 2. Real-Time Scenarios with SQL Examples

🔸 Scenario 1: Show employees on multiple assignments

SELECT person_id,
       COUNT(assignment_id) AS assignment_count
FROM   per_all_assignments_m
GROUP  BY person_id
HAVING COUNT(assignment_id) > 1 

Use Case: Identify concurrent or dual-role employees.

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🔸 Scenario 2: Get employees who joined in the last 3 months

SELECT full_name,
       hire_date
FROM   per_all_assignments_m
WHERE  hire_date >= ADD_MONTHS(SYSDATE, -3) 

Use Case: New joiner analysis or onboarding tracking.

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🔸 Scenario 3: Calculate years of service

SELECT person_number, full_name,
       ROUND(MONTHS_BETWEEN(SYSDATE, hire_date) / 12, 2) AS years_of_service
FROM per_all_assignments_m;

Use Case: Reports for retirement eligibility or long-service awards.

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🔸 Scenario 4: List employees without email addresses

SELECT p.person_number,
       p.full_name
FROM   per_all_people_f p,
       per_email_addresses e
WHERE  e.email_address IS NULL
       AND p.person_id = e.person_id 

Use Case: For HR communication audits or contact validation.

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🔸 Scenario 5: Fetch department-wise average salary

SELECT department_id,
       ROUND(AVG(salary_amount), 2) AS avg_salary
FROM   fusion.salary_data
GROUP  BY department_id 

Adjust table name based on actual Fusion HCM implementation.

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🔹 3. How to Answer Scenario-Based Questions Effectively

✅ Start with understanding: Clarify what data the business needs
✅ List the required tables: Mention the key HCM tables like PER_ALL_PEOPLE_F, PER_ALL_ASSIGNMENTS_M, PER_JOBS, etc.
✅ Apply effective dates: This shows you're Fusion-specific
✅ Write clean SQL: Prefer aliases, indentation, and explain joins
✅ Validate logic: Describe how you'd test the result in BIP or OTBI

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🔹 4. Bonus: Quick SQL Challenges

Task	Table(s) Involved
Find all terminated employees	PER_ALL_ASSIGNMENTS_M
Get count of employees per job	PER_ALL_ASSIGNMENTS_M, PER_JOBS
List employees with more than one email	PER_EMAIL_ADDRESSES
Pull active payroll elements	PAY_ELEMENT_ENTRIES_F
Check missing bank account details	CE_BANK_ACCOUNTS, PER_PEOPLE

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🔹 Summary

✅ Practice real-world queries like assignments, new joiners, tenure, and email audits
✅ Use effective date filters, joins, and functions like NVL, ROUND, COUNT, CASE
✅ Prepare with business context and performance-focused logic
✅ Be clear in interviews about why and how your SQL solves a business problem

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🔹 Next Steps

• Previous Chapter:  Mastering SQL for Oracle Fusion HCM – Chapter 16. Best Practices for SQL in Fusion HCM – Optimizing Reports and Queries

• Next Chapter:  Mastering SQL for Oracle Fusion HCM – Chapter 18. How to Debug and Test SQL Queries in Fusion HCM

  
  

 Pages 

Mastering SQL for Oracle Fusion HCM

Oracle Fusion HCM Extracts

Oracle Fusion BI Publisher Course

Oracle Fusion Fast Formulas