问题：
What's the longest possible worldwide phone number I should consider in SQL varchar(length) for phone.我应该在电话的 SQL varchar(length)考虑最长的全球电话号码是多少。
considerations:考虑：
- + for country code + 国家代码
- () for area code () 为区号
- x + 6 numbers for Extension extension (so make it 8 {space}) x + 6 个数字用于扩展扩展名（因此将其设为 8 {space}）
- spaces between groups (ie in American phones +x xxx xxx xxxx = 3 spaces)组之间的空格（即在美国电话中 +x xxx xxx xxxx = 3 个空格）
- here is where I need your help, I want it to be worldwide这就是我需要你帮助的地方，我希望它遍布全球
Consider that in my particular case now, I don't need cards etc. number begins with country code and ends with the extension, no Fax/Phone etc. comments, nor calling card stuff needed.考虑到我现在的特殊情况，我不需要卡片等号码以国家代码开头并以扩展名结尾，没有传真/电话等评论，也不需要电话卡内容。
解决方案：
参考一： https://en.stackoom.com/question/32El参考二： https://stackoom.com/question/32El