PostgreSQL: CASE
The CASE statement is the “if-then-else” of the SQL world. In PostgreSQL, it allows you to add conditional logic directly into your queries without needing...
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Result for Topic: PostgreSQL
PostgreSQL: constraints
In PostgreSQL, constraints are rules applied to columns or tables ti prevent invalid data from entering the database. They ensure the accuracy, reliability and integrity...
PostgreSQL: ALTER TABLE command
In SQL, the ALTER command is used to modify the structure of an existing database object such as a table, column, or constraint. Unlike the...
PostgreSQL: Sorting, Filtering & Aggregation
These three operations are typically performed using the following clauses in a SELECT statement: Operation SQL Clause Function Filtering WHERE Selects which rows to include...
PostgreSQL: data types
Understanding data types is foundational for optimizing database design, ensuring data integrity, and enhancing application performance. Choosing the Right Data Type Selecting the proper data...
CRUD operations in PostgreSQL
CRUD operations in PostgreSQL are the four basic actions you perform on table data: Create, Read, Update, Delete. These are done with standard SQL commands that...
Postgress: Login to a PostgresSQL
Logging in Using pgAdmin Logging in Using psql Command Line Commands List all databases Connect to the database named postgres Disconnect Create database Drop database...
PostgreSQL: Database vs Schema vs Table
As the above image represents “Database vs Schema vs Table,” these are the fundamental hierarchy in a PostgreSQL (and most relational) database system. 1. Database...
REST API with NestJS, PostgreSQL, and TypeORM
NestJS is a progressive Node.js framework for building efficient and scalable server-side applications. In this guide, we’ll walk through setting up a NestJS project with...