29

面试官最喜欢问的SQL，这些问题你都弄懂了吗？-程序员麦冬

 3 years ago
source link: https://blog.51cto.com/14849432/2525627
Go to the source link to view the article. You can view the picture content, updated content and better typesetting reading experience. If the link is broken, please click the button below to view the snapshot at that time.
正则表达式“\d+.?\d*”，在匹配下列字符串时结果失败的是（C）。A.12.5B.1.25C.以上都成功D.以上都失败注释：\d+ 表示可以出现1次或是n次数字.? 表示可以“.”可以出现一次，也可以不出现\d* 表示可以出现0次或是n次数字string、stringbuilder、stringbuffer 区别？stringbuilder、stringbuffer 哪个是线程不安全？(1)

report

Recommend

About Joyk


Aggregate valuable and interesting links.
Joyk means Joy of geeK