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.
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Every program built with a dedicated engineer
Companies: Aptar, ArcelorMittal, Equans, EDF, Ubisoft and Microsoft.
Dive into nested subqueries and recursive CTEs, practice on real 1M row datasets, build window functions for temporal analyses, generate deliverable analytical reports, test with EXPLAIN to visualize costs, while optimizing to scale in production.
Analyze execution plans with EXPLAIN ANALYZE, create composite and partial indexes on large volumes, measure gains up to 90% speed, exercise on real slow query cases, produce tuning reports with automated scripts, boost your skills for smooth databases.
Simulate high concurrency scenarios with 100 simultaneous sessions, implement SAVEPOINT and conditional ROLLBACK, test isolation levels to avoid deadlocks, develop expert triggers for audits, deliver secure stored procedures, master pitfalls in multi-user environments.
Build automatically refreshed materialized views, partition tables by date or hash for billions of rows, migrate historical datasets in practical exercises, measure impacts on real-time queries, generate deliverable SQL dashboards, scale your skills for big data.
Develop ETL pipelines with PL/pgSQL or stored procedures, secure with ROW LEVEL SECURITY and audit logs, automate backups and restores via scripts, test on failover cases, produce a complete final project with monitoring, become autonomous for critical productions.
The Training SQL Expert - Optimize Queries and Database Performance program is delivered onsite or remote (blended-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 Expert - 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.
Skills assessment methods
Assessment of skills acquired during the Training SQL Expert - Optimize Queries and Database Performance program is performed through:
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
Registration is possible up to 48 business hours before the start of training. All our programs are built for corporate L&D budgets and delivered onsite or remotely.
The Learni story
Founded by engineers and learning experts, Learni's mission is to make high-impact tech training accessible to teams everywhere. We work remotely with organizations across the US and Canada, in your time zone, to help teams upskill fast.
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.
Rigorous trainer selection
Each trainer is validated on three criteria: hands-on field expertise, proven pedagogy and alignment with your industry.
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.
Content tailored to your context
No recycled slides. The syllabus is reworked from your real cases: tools, constraints, vocabulary, ongoing projects.
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.
A simple promise: you don't pay to discover the trainer on day one. Everything is validated upfront, by you.

A school kit donated to a child for every training booked
To fight inequalities in access to education, Learni donates a complete school kit to a child in need for every training booked. You build your skills, a child heads back to school.
30 minutes with a learning advisor. No commitment. No sales pitch dressed up as a demo.
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