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AI SKILLS · Databases & data

Tune slow queries with AI

Use AI to interpret execution plans, then prove each suggested change with measurements.

Advanced

Why this skill matters

A suggested index can speed up one query while slowing writes and other queries.

What to learn

  • Read an execution plan and find the costly step
  • Test a rewrite or index on realistic data volumes
  • Record the before and after timings and the write cost

Before you begin

Comfortable writing SQL; access to a test database

PUT IT INTO PRACTICE

Build a work sample

Capture EXPLAIN ANALYZE output for a slow query on a test database, ask an assistant for three options, and measure each one.

Evidence of progress

A before-and-after plan comparison with the option you chose and why.

This exercise is an original ToolGrail suggestion. Use public, synthetic, or approved data.

LEARNING RESOURCE

Using EXPLAIN

PostgreSQL Documentation · Resource checked 2026-11-04

Open learning resource ↗

This may be documentation, a framework, or a training path. Product access, accounts, or paid licenses may be needed for hands-on exercises.

Tools you could practice with

Matched by related tasks. Use a tool you already have access to; these are examples, not course requirements.

ToolPricing not verified
Datadog Database MonitoringDatabase monitoring

Query-level monitoring and explain plans across database hosts.

Teams already using Datadog.
Details ↗
ToolPricing not verified
DBtuneQuery tuning

AI that tunes PostgreSQL automatically for performance and stability.

Teams running PostgreSQL at scale.
Details ↗
ToolPaid
pganalyzeQuery tuning

PostgreSQL performance monitoring with query and index advice.

PostgreSQL DBAs and backend teams.
Details ↗

Skill descriptions, exercises, and priorities are editorial. They are not professional qualifications or guarantees of employment. Read our skills methodology →

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