SQL Patterns: The Recognition Approach - Stop Memorizing Syntax, Start Recognizing Patterns ler

Isbn 13: 9798182311410

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Descrição do livro

Most people don't struggle with SQL syntax. They struggle with patterns.

The syntax is a handful of keywords. You can look those up. What separates someone who knows SQL from someone who thinks in SQL is recognition — seeing a new problem and instantly knowing which shape of query it wants.

This book teaches that recognition.

Drawn from thirty years of working with production SQL, SQL Patterns distills the work into the twenty-five patterns that solve almost everything — plus a bonus interview classic. Not two hundred patterns. Twenty-five. Once you can recognize them, most SQL problems stop being puzzles and start being familiar.

Every pattern is built the same way:

  • The real-world symptom that signals the pattern
  • The pattern itself, shown and explained
  • Why it works — the mental model, not just the mechanics
  • The trap that quietly produces wrong answers
  • Drills to make the recognition automatic


You'll learn to recognize and solve:

  • Rows that vanish because of the wrong JOIN
  • Reports that skip the days when nothing happened
  • Running totals, moving sums, and rolling averages
  • Finding the latest row per group — and the value that was true on a past date
  • Turning rows into columns when "the boss wants the months across the top"
  • Why deep pages of results get slower, and how to fix it
  • Finding duplicates, removing them, and filling the gaps


The patterns are organized so they build on each other, with a Symptom Index at the back: arrive with a problem in plain English — "my old report changes its numbers when I rerun it" — and leave with the pattern that fixes it.

Examples lean on standard SQL with notes where PostgreSQL, SQL Server, MySQL, SQLite, and Oracle differ. The patterns are universal; the syntax is a detail you can translate.

Who it's for: analysts, developers, bootcamp students, interview-preppers, and anyone who can write a basic query but wants to stop guessing and start recognizing.

Stop memorizing syntax. Start recognizing patterns.

Número de páginas :192
Isbn 13 :9798182311410
Encadernação SQL Patterns: The Recognition Approach - Stop Memorizing Syntax, Start Recognizing Patterns:Capa Comum
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