SQL
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SQL
SQL (Structured Query Language) is a standard programming language used to store, manage, and retrieve data in relational databases. :contentReference[oaicite:0]{index=0}
It allows users to perform operations such as querying data, inserting records, updating information, and deleting data from database systems. :contentReference[oaicite:1]{index=1}
Commands
- SELECT – Retrieve data from a database
- INSERT – Add new records
- UPDATE – Modify existing data
- DELETE – Remove data
- CREATE – Create databases and tables
Types of SQL Commands
- Data Definition Language (DDL)
- Data Manipulation Language (DML)
- Data Query Language (DQL)
- Data Control Language (DCL)
- Transaction Control Language (TCL)
Features
- Works with relational databases
- Uses simple English-like syntax
- Standardized by ANSI and ISO :contentReference[oaicite:2]{index=2}
- Supports large-scale data management
Uses
- Database management and queries
- Web applications and backend systems
- Data analysis and reporting
- Enterprise and business applications
Importance
- Backbone of relational database systems :contentReference[oaicite:3]{index=3}
- Enables efficient data storage and retrieval
- Widely used in software development and analytics