Elysiate blog
Practical guides for privacy-first developer tools, SEO and content operations, data and file workflows, cloud and API security, AI engineering, and sustainable freelance work. Everything here supports the same philosophy as our browser-based utilities: your data stays on your device until you choose otherwise.
For tabular data, the CSV tools hub covers validation and conversion in the browser, and the CSV topic index lists every CSV-tagged guide in one place.
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- SQL for Data Analysis Best Practices
A detailed guide to SQL for data analysis best practices, covering query clarity, validation, joins, aggregation, CTEs, date filters, NULL handling, performance, and analysis workflows that produce reliable results.
- SQL for Backend Developers Guide
A detailed SQL guide for backend developers with practical query patterns, schema design advice, indexing strategy, transaction handling, and performance habits for real applications.
- SQL EXPLAIN Plan Guide
A detailed guide to SQL EXPLAIN plans, including how to read execution plans, understand scans and joins, compare estimated versus actual rows, and use query plans to find real performance bottlenecks.
- SQL DISTINCT vs GROUP BY
A detailed guide to SQL DISTINCT vs GROUP BY, covering duplicate removal, aggregation, query intent, performance, common mistakes, and practical examples for developers and analysts.
- SQL DELETE vs TRUNCATE vs DROP
A detailed guide to SQL DELETE vs TRUNCATE vs DROP, covering data removal, table removal, performance, rollback, identity reset behavior, constraints, and common mistakes developers make.
- SQL Date Functions Guide
A detailed SQL date functions guide covering current date and time, date arithmetic, range filtering, grouping by month, date differences, truncation, formatting, and real reporting patterns.
- SQL CTEs Explained With Examples
A detailed guide to SQL CTEs with examples, covering basic syntax, multiple CTEs, recursive CTEs, reporting workflows, data cleanup, updates, deletes, and common mistakes.
- SQL Composite Indexes Explained
A detailed guide to SQL composite indexes, covering multi-column index design, leftmost prefix behavior, filtering, sorting, joins, common mistakes, and practical indexing patterns for real workloads.
- SQL Complete Guide for Beginners and Developers
A detailed SQL guide for beginners and developers with practical examples, core syntax, query patterns, data modeling basics, and the SQL concepts most useful in real projects.
- SQL Cheat Sheet for Developers
A developer-friendly SQL cheat sheet with practical syntax, examples, and common query patterns for day-to-day database work.