Databases Beginner

What is Connection String?

A formatted string containing all parameters needed to establish a connection to a database server.

Connection strings specify the database driver, host, port, database name, username, password, and options. PostgreSQL format: postgresql://user:password@host:5432/dbname?sslmode=require.

Best practices include storing connection strings in environment variables (never in code), using SSL/TLS for encrypted connections, connection pooling, and using separate credentials per environment. Some frameworks accept individual parameters instead of a single string.

Related Terms

A query that transforms rows into columns, creating a pivot table view of aggregated data.

Time-Series Database

A database optimized for storing and querying timestamped data points like metrics, sensor readings, and event logs.

ORM (Object-Relational Mapping)

A technique that lets you interact with a database using object-oriented code instead of writing raw SQL queries.

A sequence of database operations that are treated as a single unit — either all succeed or all are rolled back.

A middleware server that sits between applications and databases, providing connection pooling, load balancing, and query routing.

A version-controlled change to a database schema that can be applied and reversed systematically.

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