Go を使用してデータベース内の行を数えるにはどうすればよいですか?

<code class="go">// Execute the query to retrieve row count
rows, err := db.Query("SELECT COUNT(*) FROM main_table")
if err != nil {
    log.Fatal(err)
}
defer rows.Close()

// Initialize a variable to store the count
var count int

// Loop through the rows
for rows.Next() {
    // Read the count into the variable
    if err := rows.Scan(&count); err != nil {
        log.Fatal(err)
    }
}

fmt.Printf("Number of rows are %s\n", count)</code>

<code class="go">var count int

err := db.QueryRow("SELECT COUNT(*) FROM main_table").Scan(&count)
switch {
case err != nil:
    log.Fatal(err)
default:
    fmt.Printf("Number of rows are %s\n", count)
}</code>