嵌入式mysql 什么意思

#include <mysql.h>
#include <stdio.h>

int main() {
    MYSQL *conn;
    MYSQL_RES *res;
    MYSQL_ROW row;

    char *server = "localhost";
    char *user = "root";
    char *password = "password"; 
    char *database = "embedded_db";

    conn = mysql_init(NULL);
  
    if (!mysql_real_connect(conn, server, user, password, database, 0, NULL, 0)) {
        fprintf(stderr, "%s\n", mysql_error(conn));
        exit(1);
    }
  
    if (mysql_query(conn, "SELECT * FROM users")) {
        fprintf(stderr, "%s\n", mysql_error(conn));
        exit(1);
    }
  
    res = mysql_use_result(conn);

    printf("MySQL Tables in mysql database:\n");

    while ((row = mysql_fetch_row(res)) != NULL)
        printf("%s \n", row[0]);

    mysql_free_result(res);
    mysql_close(conn);
  
    return 0;
}