Learn SQL in One Day and Learn It Well (Jamie Chan, LCF Publishing)（Z-Library）

【One-Line Pitch】 A fast, hands-on introduction to SQL using MySQL, built around one continuous practice database and a final project. Best for beginners, career-switchers, or anyone who needs working SQL skills quickly rather than a reference tome. 【Book Arc】 - **Opening (~0%–11%)**: Sets up MySQL Workbench, explains how to use the book (bold code = type it yourself), and introduces the `companyHR` practice database with its `employees` and `mentorships` tables. - **Early (~11%–33%)**: Covers the core CRUD and querying toolkit — creating tables with data types and constraints (primary, foreign, unique, named), inserting/updating/deleting rows, then `SELECT` with filtering, aliases, `WHERE`, `ORDER BY`, `LIMIT`, `DISTINCT`, and subqueries. - **Early–Middle (~33%–41%)**: Moves into functions and aggregation — string, date/time (`NOW()`, `CURDATE()`), and numeric functions, plus aggregate functions (`AVG`, `MAX`, `MIN`, `SUM`) with `GROUP BY` and `ROUND`. - **Middle (~41%–52%)**: Introduces multi-table work through joins (inner, left, right), then views for simplifying queries and restricting column access. - **Late (~52%–end)**: Advances to triggers (including the `DELIMITER` trick), variables, stored procedures with IN/OUT/INOUT parameters, and stored functions that must `RETURN` a value. - **Ending**: Consolidates everything in a hands-on project, with a suggested solution in the appendix. 【Key Takeaways】 - **One database, learned by doing** (Opening): The entire book builds a single `companyHR` database, so every concept connects to a running example rather than isolated snippets. - **Constraints are the backbone of table design** (Early): Primary keys, foreign keys, unique constraints, and named constraints are taught alongside `CREATE TABLE`, showing how data integrity is enforced at the schema level. - **`SELECT` is layered, not monolithic** (Early): Filtering columns, aliases, `WHERE` operators, `AND`/`OR` with parentheses, sorting, and `LIMIT` are introduced progressively so query logic compounds naturally. - **Aggregation turns rows into insight** (Early–Middle): `GROUP BY` combined with `AVG`, `MAX`, `MIN`, `SUM`, and `ROUND` is where SQL starts answering analytical questions, not just retrieving records. - **Joins are the bridge between tables** (Middle): Inner, left, and right joins are explained with Venn diagrams and the ambiguity problem of shared column names, making multi-table queries approachable. - **Views simplify and secure access** (Middle): A view is a stored query acting as a virtual table; it can also hide sensitive columns like passwords from other users. - **Triggers and stored routines unlock automation** (Late): `DELIMITER` handling, `BEFORE`/`AFTER` triggers, variables, and stored procedures/functions show how to embed logic inside the database itself. - **The project is the real test** (Ending): A single hands-on project with a suggested solution forces you to combine schema design, querying, and routines into one working system. 【Reading Tips】 - **Type every bold example**: The book explicitly marks code you should run; skipping this defeats the "learn it well" promise. Set up `practice.sql` early and keep it open. - **Deep-read the constraints and joins chapters**: These are the conceptual hinges — constraints for correct schema design, joins for anything beyond single-table queries. Skim the function reference sections and return as needed. - **Don't fear the `DELIMITER` section**: It looks intimidating but exists only because triggers and procedures contain internal semicolons. Read it once carefully, then treat it as boilerplate. - **Do the final project before checking Appendix C**: Struggle through it first; the suggested solution is far more instructive after you've made your own mistakes. - **Treat this as a launchpad, not a reference**: It covers MySQL fundamentals efficiently but is not exhaustive — plan to follow with deeper material on indexing, performance, and administration. 【Coverage Limits】 The excerpts cover the book's structure and core teaching sequence but do not include the full text of later chapters, the complete project specification, or Appendix C's solution. Specific page-level detail on the final project's requirements is therefore not summarized here.