select id,name,phone_number from contacts c where (c.phone_number like '___-___-____' or length(c.phone_number)=10 ) and (c.phone_number like '1%' or c.phone_number like '2%' or c.phone_number like '3%' or c.phone_number like '4%' or c.phone_number like '5%' or c.phone_number like '6%' or c.phone_nu...
_hengheng：环境是炸裂的，面试是优中选优的，学那些不如去看看各种面经会问那些，岗位上写的需要哪些知识