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.
Describe your need, get a tailored program and a pre-filled quote in 3 min. A 100% free call with an advisor.
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
Without SQL expert mastery, your databases slow down by 50% in production, leading to 20h/week lost per dev team, as in 70% of non-optimized companies (source Gartner).
Concurrency errors cause critical data losses, billed at 100k€/incident.
Poorly tuned queries explode cloud costs x3.
Miss DBA/Data Lead promotions due to lack of advanced expertise.
Invest 28h to multiply performance x10, secure jobs, and boost data ROI 300%.
No longer risk costly outages or project delays.
Dive into nested subqueries, discover Common Table Expressions to structure your analyses, manipulate window functions like ROW_NUMBER and RANK on real datasets, perform practical exercises on PostgreSQL and MySQL, produce deliverable analytical reports, gain fluency in handling millions of rows effortlessly.
Analyze execution plans with EXPLAIN, create composite and covering indexes tailored to your needs, test refactoring slow queries on real e-commerce cases, measure gains up to 90% speed improvement, simulate loads with tools like pgBadger, export personalized optimization reports, transform your databases into ultra-responsive machines.
Manage isolation levels like SERIALIZABLE and READ COMMITTED, implement deadlock detection with scripts, practice MVCC on PostgreSQL, resolve high-concurrency scenarios through pair exercises, produce transactional audit logs, secure your critical data, avoid financial losses due to inconsistencies.
Develop dynamic stored procedures with cursors, code triggers for automated audits, partition giant tables by range or hash, test on simulated Big Data volumes, integrate with real ETL processes, finalize deliverable capstone project, leave with expertise to scale your DB infrastructures.
The SQL Expert Training - Optimize Queries and Database Performance 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.
For the smooth delivery of the SQL Expert Training - Optimize Queries and Database Performance program, the following equipment is required:
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.
Assessment of skills acquired during the SQL Expert Training - Optimize Queries and Database Performance program is performed through:
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.
Registration is possible up to 48 business hours before the start of training. All our programs are eligible for corporate training budgets and employer-funded plans.
« cool, j'ai appris des trucs »
« j'etais perdu au debut mais Ramy Saharaoui m'a pas laché, il a pris le temps. merci vraiment »
« la formation dev etait intense mais grave bien. merci Anthony Khelil »
« 😊👍 »
« bien 👍 »
« Allan Busi t'es au top, continue comme ça. formation géniale »
« cool, j'ai appris des trucs »
« j'etais perdu au debut mais Ramy Saharaoui m'a pas laché, il a pris le temps. merci vraiment »
« la formation dev etait intense mais grave bien. merci Anthony Khelil »
« 😊👍 »
« bien 👍 »
« Allan Busi t'es au top, continue comme ça. formation géniale »
« cool, j'ai appris des trucs »
« j'etais perdu au debut mais Ramy Saharaoui m'a pas laché, il a pris le temps. merci vraiment »
« la formation dev etait intense mais grave bien. merci Anthony Khelil »
« 😊👍 »
« bien 👍 »
« Allan Busi t'es au top, continue comme ça. formation géniale »
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.
Each trainer is validated on three criteria: hands-on field expertise, proven pedagogy and alignment with your industry.
30-minute video call between you and the selected trainer to validate the fit, adjust content and clear any final doubts.
No recycled slides. The syllabus is reworked from your real cases: tools, constraints, vocabulary, ongoing projects.
Live evaluations, 30/90/180-day check-ins and a consolidation plan. If the impact misses the mark, we rework it.
A simple promise: you don't pay to discover the trainer on day one. Everything is validated upfront, by you.
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