PBC-SQ · Associate
SQL & Databases — Associate
The universal language of data. Required for data analyst, data engineer, backend dev, and product analyst roles.
Duration
40h self-paced
Exam
50 Qs · 90min
Pass mark
70%
What you'll learn
Almost every company stores its data in a relational database. Almost every data role requires SQL. Yet SQL is undertaught — many 'data analysts' can drag-and-drop in Tableau but can't write a JOIN. This certification proves you can write production-quality SQL. Covers SELECT/WHERE/ORDER/LIMIT, filtering operators, aggregations (COUNT, SUM, AVG, MIN, MAX), GROUP BY and HAVING, all JOIN types (INNER, LEFT, RIGHT, FULL OUTER, CROSS), subqueries and CTEs, window functions (ROW_NUMBER, RANK, LAG, LEAD, running totals), string and date functions, NULL handling, CASE statements, complex schemas, EXPLAIN for performance, and SQL dialects (PostgreSQL, MySQL, SQL Server). Capstone: write SQL against a real-world messy database to answer business questions.
Course modules
- 01~14min
What databases are and why SQL exists — the universal language of data
SQL is the most-used data language in the world. Every Nigerian fintech, telco, bank, and e-commerce platform stores its data in tables and queries it with SQL. This module sets the foundation.
- 02~16min
SELECT, FROM, WHERE — querying data with the core SQL commands
Most SQL work uses SELECT, FROM, and WHERE. Master these three and you can answer most everyday data questions. This module builds them up step by step with realistic Nigerian e-commerce examples.
- 03~17min
JOINs — combining data across multiple tables
Real databases split data across many tables. JOINs are how you bring them back together. Master the four types of JOINs and you can answer almost any cross-table question.
- 04~15min
Aggregations, GROUP BY, and HAVING — turning rows into insights
Aggregations turn many rows into summary numbers — total sales, average order, customer count by city. GROUP BY lets you do this per-group. This is where SQL becomes analytical.
- 05~17min
Subqueries, CTEs, and window functions — handling complex analyses
When simple SELECTs aren't enough, you reach for subqueries, CTEs (Common Table Expressions), and window functions. These are the tools that separate junior from senior SQL skill.
- 06~14min
INSERT, UPDATE, DELETE, and transactions — modifying data safely
SELECT reads. INSERT, UPDATE, and DELETE write. This module covers data modification, the safety habits that prevent disasters, and transactions for guaranteeing atomic operations.
- 07~15min
Schema design, indexes, and performance basics
Beautiful queries on a badly-designed schema is like a Ferrari driving on a dirt road. This module covers how to design tables, add indexes intelligently, and reason about query performance.
- 08~13min
Tools, careers, advanced topics, and what's next
You've covered the core SQL skills. This module rounds it off with the tools you'll use, the careers SQL unlocks, advanced topics worth knowing about, and what to study next.
What you walk away with
Not just a certificate. A career-grade credential built to open doors.
A credential employers verify in one click
Unique cert ID, QR code, and tamper-evident signature. No more wondering if your certificate is taken seriously.
A portfolio piece, not just a paper
Your capstone project lives on your public PBV portfolio. Recruiters click and see actual work — that beats a cert badge every time.
Lifetime access, no expiry
Once you earn it, it's yours. No renewals, no subscriptions, no surprises.
A profile that stands out
Verified PBV credentials show up on your PBridge freelancer profile, putting you ahead of unverified candidates in client searches.
Why PBC works for Nigerian learners
- ✓Naira pricing, no FX surprises. Pay in NGN, get charged in NGN.
- ✓Built for the Nigerian context. Case studies and capstone briefs use real Nigerian business scenarios.
- ✓Reviewed capstone project. A human reviews your final project.
- ✓Verifiable digital certificate. QR code and cryptographic hash for one-scan verification.
- ✓PBridge job board access. Featured in front of employers hiring on PBridge.
SQL & Databases certification FAQs
How much does the SQL & Databases certification cost in Nigeria?+
The PBridge Certified SQL & Databases certification costs ₦25,000 for the exam-only path and ₦45,000 for the full path which includes the capstone project review. Both prices are in Nigerian Naira with no FX risk. Payment via Flutterwave (card or bank transfer).
Is the PBridge Certified SQL & Databases certification recognized in Nigeria?+
Yes. PBridge Certified certifications are issued with verifiable digital credentials including a unique cert ID, QR code, and hash signature. Hiring managers in Lagos, Abuja, Port Harcourt, and remote-first companies can verify any cert at https://www.pbridgeco.com/verify/{cert-id}. Built specifically for the Nigerian and African job market.
How long does it take to complete the SQL & Databases certification?+
The SQL & Databases certification takes approximately 40 hours of self-paced study. The exam itself is 90 minutes with 50 questions. Most candidates complete the full path including the capstone project in 4-8 weeks studying part-time alongside work.
What makes PBridge Certified the right fit for Nigerian learners and employers?+
PBridge Certified is built specifically for the Nigerian market — Naira pricing with no FX surprises, capstone scenarios drawn from real Nigerian businesses (think Bumpa, Paystack, Flutterwave-style cases), recognition by Nigerian hiring managers, and direct integration with the PBridge job board so certified holders get featured in front of employers actively hiring.
Can I get a job after the SQL & Databases certification?+
PBridge Certified cert holders get priority access to the PBridge job board where Nigerian and remote employers post sql & databases roles. Pair the certification with the capstone project as a portfolio piece — most certified holders see callbacks within 30 days. Salary range: varies by experience.