“Beyond the Basics: SQL Tricks Every Pro Should Know”
In a Database Management System (DBMS), SQL (Structured Query Language) serves as the standard language for accessing and manipulating relational data. Beyond the fundamental operations such as SELECT, INSERT, UPDATE, and DELETE, SQL provides a rich set of additional basic operations. These enhance its expressive power, allow for more sophisticated data retrieval and transformation, and make it more user-friendly for complex queries. Let’s break down these additional operations in detail. 1. String Operations String operations allow users to manipulate and compare textual data within queries. This is vital for tasks like formatting names, searching with partial matches, or extracting substrings. Common String Functions: CONCAT(): Combines two or more strings. SELECT CONCAT(first_name, ‘ ‘, last_name) AS full_name FROM students; LENGTH() or CHAR_LENGTH(): Returns the number of characters in a string. SELECT name FROM students WHERE LENGTH(name) > 10; UPPER() and LOWER(): Converts str...