SQL Comments
Learn how to use SQL comments to document queries using single-line (–) and multi-line (/* … */) comments with examples.
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SQL Aliases
Learn SQL aliases using AS to rename columns or tables for better readability. Step-by-step examples included.
SQL Basic Functions
Learn SQL basic functions like UPPER, LOWER, ROUND, NOW(), and DATE functions. Step-by-step examples for string, number, and date operations.
SQL LIMIT & FETCH FIRST
Learn SQL LIMIT and FETCH FIRST for row limiting. Step-by-step guide with syntax, examples, and practice queries for MySQL, PostgreSQL, and SQL Server.
SQL Operators
Learn SQL Operators in detail – Arithmetic, Comparison, Logical, and Bitwise operators with syntax and examples.
🚀 SQL Beginner Level Course
Start your SQL journey with RetailCoder.com! Learn SQL basics, data types, CRUD operations, SELECT, WHERE, ORDER BY, and more. Structured, beginner-friendly lessons.
SQL NULL Handling
Learn how to handle NULL values in SQL using IS NULL and IS NOT NULL. Represents a missing or unknown value.
SQL LIKE, IN, BETWEEN
Learn SQL LIKE, IN, and BETWEEN with examples. Understand how to filter data using pattern matching, sets, and ranges in SQL.
SQL DISTINCT
Learn SQL DISTINCT keyword with examples. Understand how to remove duplicate values from query results in SQL.
SQL ORDER BY Clause
Learn SQL ORDER BY clause with examples. Understand how to sort query results in ascending or descending order.