c – 为(auto i：unordered_map)保证每次都有相同的顺序？

std::unordered_map<std::string,std::string> map;

std::string query = "INSERT INTO table (";
bool first = true;
for(auto i : map)
{
    if(first) first = false;
    else query += ",";
    query += i.first;
}
query += ") ";

query += "VALUES (";
first = true;
for(auto i : map)
{
    if(first) first = false;
    else query += ",";
    query += i.second;
}
query += ");"

在上面的示例中,生成的字符串应该是这种形式.因此,重要的是,两个时代,迭代的顺序是一样的.

INSERT INTO table (key1,key2,key3) VALUES (value1,value2,value3);

这是否保证在C？