How does the removal of outdated records from the database occur?

Removing outdated records from a database in Go typically involves executing an SQL query through a database driver. To do this:

1. Establish a connection to the database (for example, using the database/sql package).
2. Execute a DELETE query with a condition that identifies outdated records (for example, based on date).

Example of deleting records older than a certain date:

import (
    "database/sql"
    "log"
    "time"
    _ "github.com/lib/pq" // example for PostgreSQL
)

func deleteOldRecords(db *sql.DB, cutoff time.Time) error {
    query := `DELETE FROM records WHERE created_at < $1`
    result, err := db.Exec(query, cutoff)
    if err != nil {
        return err
    }
    rowsAffected, _ := result.RowsAffected()
    log.Printf("Deleted records: %d", rowsAffected)
    return nil
}

Thus, deletion occurs through an SQL query with a filter, and the Go code is responsible for executing this query and handling the result.