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Full Name
Tobias Petry
Full Name
ACE Pro
Top Level Details
Job Role
Database Consultant
Company
Independent Consultant
Country
Germany
Top Expertise
MySQL
Focus Area
MySQL
About Tobias
Hey! I'm Tobias, a database specialist and educator from Germany. In my first year of programming, I slowed down an application to multi-second response times with a single slow SQL query. This experience sparked my desire to learn all about databases and their performance. In the past 15+ years, I became a database expert with a lot of expertise in the architectures and quirks of many database systems. My favorite part of databases is that feeling, when you find and optimize all the slow queries that the application feels much more speedy afterward. At present, I use most of my time working with databases: I help development teams fix their performance problems, teach advanced SQL features and build tools to better work with databases. As a full-stack developer and database engineer, I am the missing link between a developer's approach and the knowledge of a database expert to know more efficient ways to solve a problem.
Expertises
MySQL
Home Page
https://tpetry.me
Links
Latest Contributions
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What is type range in MySQL EXPLAIN?
Feb 04, 2025 - Blog post -
MySQL
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What is type index_subquery in MySQL EXPLAIN?
Feb 04, 2025 - Blog post -
MySQL
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What is type unique_subquery in MySQL EXPLAIN?
Feb 03, 2025 - Blog post -
MySQL
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What is type ref_or_null in MySQL EXPLAIN?
Feb 03, 2025 - Blog post -
MySQL
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What is type fulltext in MySQL EXPLAIN?
Feb 02, 2025 - Blog post -
MySQL
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What is type index_merge in MySQL EXPLAIN?
Feb 02, 2025 - Blog post -
MySQL
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What is type ALL in MySQL EXPLAIN?
Feb 01, 2025 - Blog post -
MySQL
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What is type index in MySQL EXPLAIN?
Feb 01, 2025 - Blog post -
MySQL
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What is type const in MySQL EXPLAIN?
Jan 31, 2025 - Blog post -
MySQL
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What is type ref in MySQL EXPLAIN?
Jan 31, 2025 - Blog post -
MySQL
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What is type eq_ref in MySQL EXPLAIN?
Jan 30, 2025 - Blog post -
MySQL
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What is the type column in MySQL EXPLAIN?
Jan 28, 2025 - Blog post -
MySQL
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Understanding MySQL EXPLAIN Output
Jan 26, 2025 - Blog post -
MySQL
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