A subquery is a nested query that acts as a single unit within a larger SQL statement. It's often used to filter or aggregate data based on specific conditions...
You want to store data in a PostgreSQL database with an "expiry time. "After that expiry time, the data entry should be automatically deleted...
SQLite is a database engine, not a program itself. It manages data stored in files with the . sqlite or . db extension. These files contain the database structure and the actual data...
You're using PostgreSQL, a database management system, on macOS.You installed a new version of macOS (Yosemite or El Capitan in this case)...
See 'systemctl status mariadb. service' and 'journalctl -xn' for details: These are commands you can use to diagnose the issue...
Prepared statements are a security feature in MySQL and MariaDB that enhance query security by separating the query structure from the data (parameters)...
Database: In MongoDB, a database is a container that holds collections (similar to tables in relational databases). Each collection stores documents (JSON-like structures) representing your data
Enums (enumerated types) in PostgreSQL are a way to define a set of allowed values for a column.They enforce data integrity by restricting entries to the predefined list
There are two main ways to back up an SQLite database:Here are some resources to learn more about backing up SQLite databases:
Designed for: Storing short to medium-length strings with a defined maximum length. This is ideal when you know the typical range of characters your data will hold (e.g., names