SQL Performance Battle: GROUP BY vs. Self-Join in UPDATE Queries
Which SQL UPDATE query performs better: one using GROUP BY or a self-join? This in-depth…
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MySQL
Tips
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Database
MySQL
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Tips
Optimizing GROUP BY in MySQL: Insights from Real-Life Query Analysis
My current query: SELECT eod.date, SUM(eod.stable_price) AS sumStablePrice FROM item_eod eod WHERE eod.date >= CURRENT_DATE…
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7 Essential Caching Strategies to Boost Backend Performance and Scalability
Discover 6 powerful caching strategies to enhance backend performance and scalability. From in-memory and distributed…
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Database
PostgreSQL
Postgres Index Methods: Things you need to know
In PostgreSQL, different types of index methods are used to optimize query performance, especially for…
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Architecture & Design
Database
PostgreSQL
How to prevent table lock when add/drop index in Postgres?
The CONCURRENTLY option in PostgreSQL is used when creating or dropping indexes to avoid locking…
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Ruby
Behind the Scenes of Ruby Objects lifecycle
In Ruby, objects form the core of the language. Everything in Ruby is an object—from…
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Architecture & Design
Ruby
The Hidden Power of Symbols in Ruby: When to Use Symbols Instead of Strings
In Ruby programming, most developers default to using strings for everything from data manipulation to…
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Architecture & Design
Database
MySQL
Buffer Cache Hit in MySQL: What It Is and Why It Matters
The InnoDB Buffer Pool in MySQL is essentially a cache that stores frequently accessed data…
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Database
MySQL
MySQL Indexes: Boosting Query Performance with Column Order
In MySQL, the order of columns in a composite index (an index that spans multiple…