sql自学时间差函数timestampdiff
知识点:表联结,子查询,if判断,coalesce判断,timestampdiff时间间隔
时间函数datediff,timestampdiff datediff(日期1,日期2):返回日期1与
sqltimestampdiff算时间差with创建临时表
mysql时间函数timestampdiff()使用
Tips:Do Not Provide
Personal Loans: Go Easy On Your Finances
Finance, Finance, Finance, Foreign Exchange, Stocks, Currency Circle, Venture Capital, Bitcoin, ICO...