What tool or package have you used to interact with the PostgreSQL database in your projects?

In Go projects, to interact with PostgreSQL, the database/sql package is often used together with the github.com/lib/pq driver. This driver implements the database/sql interface and allows executing SQL queries, managing transactions, and working with results.

Example of connecting and executing a simple query:

import (
    "database/sql"
    _ "github.com/lib/pq"
    "log"
)

func main() {
    connStr := "user=username dbname=mydb sslmode=disable"
    db, err := sql.Open("postgres", connStr)
    if err != nil {
        log.Fatal(err)
    }
    defer db.Close()

    var name string
    err = db.QueryRow("SELECT name FROM users WHERE id = $1", 1).Scan(&name)
    if err != nil {
        log.Fatal(err)
    }
    log.Println("User name:", name)
}

Also popular are ORM libraries, such as GORM, which simplify working with the database, but for basic tasks, database/sql with the lib/pq driver is a standard and reliable choice.