Category: SQL

Database Structures, Types of Keys

Learn about tables, fields (or attributes), records, keys and table relationships. What is database structure? A database structure is the blueprint that defines how data is arranged ,organized, stored, accessed, and managed...

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Functions in SQL- Examples

SQL provides various functions to perform operations on data stored in a database. Here are some commonly used SQL functions categorized based on their functionality: Aggregate Functions: COUNT(): Counts the number of rows....

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Types of SQL commands

Data Definition Language (DDL) – to define and modify the structure of a database. Data Manipulation Language (DML) – to access, manipulate, and modify data in a database. Data Control Language (DCL) – to control...

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