บทเรียน SQL

The ROW_NUMBER() SQL function assigns sequential integers to rows within a result set, optionally partitioning the data and ordering the rows within each partition.

Review three methods to add comments in SQL: single-line comments, multiline comments, and inline comments using the following syntax: --, /*, and */.

Learn about NoSQL databases - why NoSQL, how they differ from relational databases, the different types, and design your own NoSQL database using MongoDB.

Learn about SQL DDL commands and how they help define and manage the structure of database objects.

Learn how to normalize SQL databases from 1NF through 5NF. This guide covers each normal form with real-world examples, comparison tables, and best practices for eliminating data redundancy.

Master SQL set operators: UNION, UNION ALL, INTERSECT, and EXCEPT. Learn the syntax rules, see practical examples, and understand when to use each operator.

Learn more about Data Manipulation Language (DML), how it compares to DQL and DDL, and master DML commands including SELECT, INSERT, DELETE, and UPDATE.

An introductory article on how to perform machine learning using SQL statements in PostgresML.

Unlock the power of SQL CONTAINS for advanced text searches. Dive into logical operators, proximity searches, and wildcard uses for precise data analysis.

Master SQL's NOT IN operator with this beginner's guide. Learn to filter data effectively, avoid common pitfalls, and explore efficient alternatives

Discover everything you need to know about LMQL, short for Language Models Query Language, an innovative programming language for LLMs.

Unlock the power of SQL NOT EQUAL with our expert guide. Learn to refine data queries with practical examples and optimization tips for better analysis.