What database management systems have you already worked with?

In the context of working with C/C++, experience often involves interaction with various DBMSs, such as:

• SQLite — a lightweight embedded database, often used for small projects or embedded systems.
• MySQL/MariaDB — popular relational DBMSs with client libraries for C/C++.
• PostgreSQL — a powerful relational DBMS with advanced features.
• Oracle Database — an enterprise DBMS, accessible via OCI (Oracle Call Interface).
• MongoDB — a document-oriented NoSQL database, with C++ drivers.

Experience typically includes:

• Using client libraries (e.g., libpq for PostgreSQL, MySQL Connector/C++).
• Executing SQL queries, processing results.
• Managing transactions.
• Query optimization and working with indexes.

Example of connecting to SQLite in C++:

#include <sqlite3.h>

sqlite3* db;
int rc = sqlite3_open("test.db", &db);
if(rc) {
    // handle error
}
// execute queries
sqlite3_close(db);

Experience with DBMSs depends on project tasks and data storage requirements.