SQL

Structured Query Language – programming language for managing relational databases

Part of speech: Noun Category: Information Technology Subcategory: Database Level: Intermediate

Pronunciation: IPA/ˌɛs ˌkju ˈɛl/

Definition

Structured Query Language – programming language for managing relational databases

Examples

SQL operations include: Data Definition (CREATE, ALTER, DROP), Data Manipulation (SELECT, INSERT, UPDATE, DELETE), Data Control (GRANT, REVOKE), and advanced features like joins, subqueries, stored procedures, and triggers.
Healthcare systems use SQL queries to analyze patient records across millions of entries, identifying patterns in treatment outcomes, tracking medication effectiveness, and generating compliance reports.

Case Study

The 2008 Heartland Payment Systems breach exploited SQL injection vulnerabilities, compromising 134 million credit card numbers — the largest data breach at the time. This landmark incident cost Heartland $145 million in settlements and fundamentally changed how organizations approach SQL security, leading to widespread adoption of parameterized queries and web application firewalls.

Additional Images

Videos

SQL Explained – Structured Query Language

Related Terms

Database, NoSQL, PostgreSQL, MySQL, Query

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