[Engineering Log] Why Not Index Everything?
An investigation into B-Trees, the library analogy, and why we don't index every column. Discover essential tips, full code examples, and practical insights in this guide.
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Tag: #backend
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Understanding Data Modeling
Overview of conceptual, logical, and physical data models with examples and diagrams to guide database design from abstract ideas to implementation. Read more to learn.
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Learning SQL: Constraints – Ensuring Data Integrity
Learn essential SQL constraints - NOT NULL, UNIQUE, CHECK, and DEFAULT - to enforce data integrity and maintain database accuracy with practical examples. Read more to learn.
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Learning SQL: PRIMARY VS FOREGIN KEYS
Understand the difference between PRIMARY KEY and FOREIGN KEY in SQL, how they enforce data integrity, and link database tables with practical examples. Read more to learn.
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Learning SQL: UNION and UNION ALL
Learn the difference between SQL UNION and UNION ALL—how to combine query results, remove duplicates, and optimize performance. Essential for data analysis! 🚀. Read on.
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Learning SQL: Subqueries
Master SQL subqueries & operators (ANY, ALL, EXISTS) with clear examples. Learn nested queries for WHERE, FROM, SELECT clauses—boost your SQL skills today! Read more to learn.
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Learning SQL: CASE
Learn how to use the SQL CASE statement for conditional logic in queries. Master categorization, custom labels, and conditional calculations with examples! Read more to learn.
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Learning SQL: HAVING
Master the SQL HAVING clause to filter grouped data. Understand how to apply conditions to aggregated results with practical examples and use cases. Read more to learn.
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Learning SQL: GROUP BY
Learn how to use the SQL GROUP BY clause to group and summarize data. Perfect for aggregating and analyzing datasets with clear examples and explanations. Read more to learn.
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Learning SQL: CROSS JOIN
Learn SQL CROSS JOIN: Combine every row from two tables, create all possible combinations, and understand its use cases for data analysis. Read the full guide to learn.
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Learning SQL: FULL OUTER JOIN
Master SQL FULL OUTER JOIN: Combine data from two tables, retain all rows, handle NULL values, and optimize queries for better insights. Explore this comprehensive guide.
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Learning SQL: RIGHT JOIN
Learn how to use the RIGHT JOIN clause in SQL to combine tables, retain all data from the right table, and handle NULL values effectively with examples. Read more to learn.
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Learning SQL: LEFT JOIN
Learn about SQL LEFT JOIN: combine data from two tables, return all rows from the left table, and fill unmatched rows with NULL values. Clear examples included! Read on.
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Learning SQL: INNER JOIN
Learn how to use the SQL JOIN command to combine data from multiple tables. Understand JOIN ON, JOIN USING, and NATURAL JOIN with examples and tips. Read more to learn.
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Learning SQL: DELETE
Learn how to use the SQL DELETE clause to remove records from a table. Master its syntax, apply conditions, and handle constraints to manage data effectively. Read on.
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Learning SQL: UPDATE
Learn how to use the SQL UPDATE clause to modify existing data. Master its syntax, apply conditions, and ensure data integrity with constraints. Dive into the full post.
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Learning SQL: INSERT INTO
Learn the SQL INSERT INTO statement to add single or multiple rows to a table, insert into specific columns, and handle constraints for efficient data entry. Read on.
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Learning SQL: LIMIT and OFFSET
Learn how to use SQL's LIMIT and OFFSET clauses together to control query results, paginate data, and improve performance when working with large datasets. Read more to learn.
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Learning SQL: ORDER BY
Learn how to use the SQL ORDER BY clause to sort query results by one or multiple columns in ascending or descending order with clear examples. Dive into the full post.
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Learning SQL: WHERE
Learn how to filter data using the SQL WHERE clause with operators like IN, LIKE, and more. Master combining conditions with AND and OR for efficient queries. Read on.
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Learning SQL: Column Alias
Learn how to use column aliases in SQL to simplify your query results, make calculations more readable, and improve clarity with easy-to-understand examples. Read on.
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Learning SQL: SELECT and SELECT DISTINCT
Learn how to use SQL's SELECT statement to retrieve data and filter out duplicates with DISTINCT with examples. Dive into this detailed tutorial to master the core concepts.
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Understanding Node.js Event Loop Efficiency
Understand how Node.js's event loop and non-blocking I/O efficiently manage concurrent tasks in a single-threaded environment for high-performance apps. Read more to learn.
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Understanding NoSQL vs SQL Databases
Discover the contrasts between NoSQL and SQL databases: NoSQL for flexibility and scalability, SQL for relational integrity and transaction reliability. Read more to learn.
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A Simple Guide to Set up and Deploy Node with TypeScript
Set up & deploy TypeScript Node.js app: Learn how to enable TypeScript, run locally 3 ways, & deploy the app with this guide. Discover essential tips and practical guides.
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- #typescript