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Payment by wire transferEnhanced confidentialityPerfect for companies with 50 to 500 employeesScheduling to fit any time zone
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Training SQL Expert - Optimize Queries and Performance

Ref: DYH290
10 people max.
From $1,155 HT / per person
Pay in 3 installments · On-site on request · +$540 with certification exam
1 day
Remote

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Learning objectives

  • Optimize complex queries for up to 90% performance gains
  • Analyze execution plans with EXPLAIN and EXPLAIN ANALYZE
  • Implement composite, covering, and partial indexes
  • Master recursive CTEs and advanced window functions
  • Manage transactions, locks, and isolation for high concurrency
  • Diagnose production bottlenecks

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.

Don't let this gap widen

Why this program matters

  • Without expert SQL mastery, your queries slow down by 200% in production, causing 30% downtime during traffic peaks and estimated revenue losses of 5000€/day for an average e-commerce.

  • Overloaded databases frustrate 70% of users, boost customer churn by 25%, and expose you to memory leaks or blocking locks.

  • Imagine BI reports taking 5min instead of 5s: KPIs in freefall, competitors overtaking you.

  • Our expert training avoids these pitfalls, secures your critical performance starting tomorrow.

Allan BUSI
Allan BUSI

Learni trainer · AI expert

73%productivity gap
×3cost of inaction

Program

Module 1SQL Expert: Query Optimization and Performance (MySQL, PostgreSQL)

Dive into execution plan analysis via EXPLAIN on real datasets of 1 million records, create composite and covering indexes to accelerate massive joins, optimize recursive CTEs and windows for complex analyses during timed practical exercises, simulate high-concurrency loads to manage locks and transactions, produce deliverable performance reports with before/after benchmarks, transform your slow databases into ultra-responsive machines.

Evaluation method

  • Final technical quiz, optimization project on real case, personalized feedback.

Learning method

  • 70% hands-on with pro tools, concrete exercises, immediate feedback.

Methods, materials and delivery

The Training SQL Expert - Optimize Queries and 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 Performance 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 Expert - Optimize Queries and Performance 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

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.

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.

FAQ

Frequently asked questions

How much does the Training SQL Expert - Optimize Queries and Performance training cost?+
The individual price is $1,155 (USD). A detailed quote is sent within one business day.
How long is the Training SQL Expert - Optimize Queries and Performance training?+
The training lasts 1 journée, available live online (US time zones) or on-site at your offices.
How is this training paid for?+
Most US teams pay directly through their company (L&D or training budget). We invoice in US dollars and accept bank transfer (ACH/wire) or card, with volume pricing for teams. A purchase order is welcome.
Are there any prerequisites?+
Mastery of intermediate SQL queries (multiple JOINs, subqueries, GROUP BY), practical experience on MySQL or PostgreSQL.
Is a certificate delivered at the end?+
Yes. A Learni completion certificate is issued, along with the individual evaluation report.
Does Learni provide the equipment?+
No. A computer and stable internet connection are required for the participant. Learni provides the educational platform, the trainer and all course materials.
On-site & remote

This training across cities

Available on-site and remotely. Pick your city to see the local training center.

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