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Training SQL Intermediate - Optimize Queries and Databases

Ref: YJF444
10 people max.
4200 € HT / per person
−15% from 2 people−30% from 3 people−50% from 5 people
Pay in 3 installments · +$170/day onsite · +$500 with certification exam
4 journées
distanciel

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Learning objectives

  • Master complex joins and subqueries
  • Optimize SQL query performance
  • Create and manage views, indexes, and stored procedures
  • Handle transactions and error management
  • Analyze and debug advanced queries
  • Develop ETL scripts with SQL
  • Apply SQL to real business cases

The Learni story

Founded by passionate learning and innovation experts, Learni's mission is to make professional training accessible to everyone, anywhere in the world. Our team operates in major hubs — London, New York, Boston — and internationally, to support talents and organizations in upskilling.

Don't let this gap widen

Why this program matters

  • Without this intermediate SQL training, slow queries hinder dashboards, costing up to 20% more time for analysts—like 40h/month lost per team of 5 people.

  • Join errors cause erroneous data, impacting business decisions with 10k€ annual losses.

  • Non-optimized databases saturate servers, generating 15% downtime and team frustrations.

  • Miss the opportunity: more agile competitors overtake you, salaries stagnate without advanced mastery.

  • Invest 28h to triple productivity, avoid 50k€ hidden costs/year, and secure data promotions.

Allan Busi
Allan Busi

Learni Trainer · Expert

73%productivity gap
×3cost of inaction

Program

Module 1SQL Joins and Subqueries: Structuring Complex Data

Dive into INNER, LEFT, RIGHT, and FULL joins to link multiple tables, complete practical exercises on real databases with MySQL Workbench, build nested subqueries for dynamic filtering, test on real e-commerce cases, produce optimized deliverable reports, gain autonomy for immediate multi-table analyses.

Module 2Advanced Functions and Aggregations in SQL: In-Depth Analysis

Explore WINDOW functions, RANK, and PARTITION BY for dynamic rankings, apply aggregations with HAVING on massive volumes, code custom pivots using CASE WHEN, practice on real sales datasets with PostgreSQL, generate SQL-ready charts, master CTEs for recursive queries, leave with production-ready scripts.

Module 3Views, Indexes, and SQL Optimization: Boost Performance

Create materialized views and composite indexes to accelerate queries, profile with EXPLAIN ANALYZE on slow queries, refactor SQL code to reduce execution time by 70%, simulate server loads through hands-on exercises, optimize on databases with 1M+ rows, produce deliverable optimization plans, transform your databases into fast, reliable machines.

Module 4Transactions, Procedures, and SQL Project: Deploy Autonomously

Manage ACID transactions with COMMIT and ROLLBACK, code stored procedures and triggers, integrate error handling with TRY-CATCH, complete a full ETL final project on a real HR case, debug in teams with professional tools, validate performance before/after, leave with an advanced SQL portfolio and certificate, ready to boost your data projects tomorrow.

Evaluation method

  • Daily interactive quizzes
  • Graded practical exercises
  • Final project with presentation
  • Pre/post-training skills self-assessment

Learning method

  • Hands-on exercises 70% of the time
  • Real business case studies
  • Pair debugging sessions
  • Professional tools: MySQL Workbench, pgAdmin

Methods, materials and delivery

The Training SQL Intermediate - Optimize Queries and Databases program is delivered onsite or remote (blended-learning, e-learning, virtual classroom, remote presence). At Learni, an industry-certified training organization, every program is built to maximize skills acquisition regardless of the chosen format.

The trainer alternates between demonstrative, interrogative and active methods (through hands-on labs and/or scenarios). This pedagogical approach guarantees concrete learning that's immediately applicable at work.

Equipment required

For the smooth delivery of the Training SQL Intermediate - Optimize Queries and Databases program, the following equipment is required:

  • Mac or PC computers, high-speed fiber internet, whiteboard or flipchart, projector or interactive touch screen (for remote sessions)
  • Training environments installed on workstations or accessible online
  • Course materials, hands-on exercises and complementary resources
  • Post-training access to materials and educational resources

For intra-company training on a site outside Learni, the client commits to providing all required teaching materials (computers, internet, etc.) for the smooth delivery of the program in line with the prerequisites in the communicated program.

* contact us for remote delivery feasibility** ratio varies depending on the program

Skills assessment methods

Assessment of skills acquired during the Training SQL Intermediate - Optimize Queries and Databases program is performed through:

  • During training: case studies, hands-on labs and professional scenarios
  • End of training: self-assessment questionnaire and skills evaluation by the trainer
  • After training: completion certificate detailing acquired skills

Program accessibility

Learni is committed to making its programs accessible. All our programs are accessible to people with disabilities. Our teams are available to adapt the pedagogical methods to your specific needs. Please contact us for any adjustment request.

Enrollment terms and lead times

Learni programs are available inter-company and intra-company, onsite or remote. Enrollments are possible up to 48 business hours before the program starts. Our programs are eligible for corporate funding paths. Contact us to discuss your training project and funding options.

Verified reviews

What our learners

4.9 · +100 verified reviews
★★★★★

« cool, j'ai appris des trucs »

TomFormation AWS — Cloud Practitioner
★★★★★

« j'etais perdu au debut mais Ramy Saharaoui m'a pas laché, il a pris le temps. merci vraiment »

Eva CarpentierFormation LLM en Entreprise — Claude, ChatGPT, Mistral
★★★★★

« la formation dev etait intense mais grave bien. merci Anthony Khelil »

NolanDWWM - Développeur Web et Web Mobile
★★★★★

« 😊👍 »

AmbreDWWM - Développement Web & Mobile React
★★★★★

« bien 👍 »

Léo BlanchardFormation AWS — DevOps Engineer Professional
★★★★★

« Allan Busi t'es au top, continue comme ça. formation géniale »

MargotFormation Claude & ChatGPT — Comparatif et Cas d'Usage
★★★★★

« cool, j'ai appris des trucs »

TomFormation AWS — Cloud Practitioner
★★★★★

« j'etais perdu au debut mais Ramy Saharaoui m'a pas laché, il a pris le temps. merci vraiment »

Eva CarpentierFormation LLM en Entreprise — Claude, ChatGPT, Mistral
★★★★★

« la formation dev etait intense mais grave bien. merci Anthony Khelil »

NolanDWWM - Développeur Web et Web Mobile
★★★★★

« 😊👍 »

AmbreDWWM - Développement Web & Mobile React
★★★★★

« bien 👍 »

Léo BlanchardFormation AWS — DevOps Engineer Professional
★★★★★

« Allan Busi t'es au top, continue comme ça. formation géniale »

MargotFormation Claude & ChatGPT — Comparatif et Cas d'Usage
★★★★★

« cool, j'ai appris des trucs »

TomFormation AWS — Cloud Practitioner
★★★★★

« j'etais perdu au debut mais Ramy Saharaoui m'a pas laché, il a pris le temps. merci vraiment »

Eva CarpentierFormation LLM en Entreprise — Claude, ChatGPT, Mistral
★★★★★

« la formation dev etait intense mais grave bien. merci Anthony Khelil »

NolanDWWM - Développeur Web et Web Mobile
★★★★★

« 😊👍 »

AmbreDWWM - Développement Web & Mobile React
★★★★★

« bien 👍 »

Léo BlanchardFormation AWS — DevOps Engineer Professional
★★★★★

« Allan Busi t'es au top, continue comme ça. formation géniale »

MargotFormation Claude & ChatGPT — Comparatif et Cas d'Usage
Read all reviews
Our method

Training quality, guaranteed at every step

Before, during, after: we frame the brief, introduce the trainer, tailor the content and measure impact. You stay in control from kickoff to wrap-up.

Step 1

Rigorous trainer selection

Each trainer is validated on three criteria: hands-on field expertise, proven pedagogy and alignment with your industry.

  • Triple validation: technical, pedagogical, sectoral.
  • Minimum rating 4.8/5 over the last 12 sessions.
Step 2

You meet the trainer beforehand

30-minute video call between you and the selected trainer to validate the fit, adjust content and clear any final doubts.

  • Live briefing on goals and team context.
  • Veto right — we swap the trainer for free if needed.
Step 3

Content tailored to your context

No recycled slides. The syllabus is reworked from your real cases: tools, constraints, vocabulary, ongoing projects.

  • Hands-on cases drawn from your stack and projects.
  • Program co-written then validated by your team.
Step 4

Continuous quality follow-up

Live evaluations, 30/90/180-day check-ins and a consolidation plan. If the impact misses the mark, we rework it.

  • NPS, knowledge quizzes and skills self-assessment.
  • Satisfaction guarantee: fully satisfied or free rework.

A simple promise: you don't pay to discover the trainer on day one. Everything is validated upfront, by you.

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