增加月份 add_months(timestamp date, int months) add_months(timestamp date, bigint months) Return type: timestamp usage:add_months(now(),1) 增加日期 adddate(timestamp startdate, int days), adddate(timestamp startdate, bigint days) Return type: timestamp usage:adddate(now(),1) 當前時間戳 current_timestamp()和now()等價 日期相減 datediff(string enddate, string startdate) Return type: int usage:datediff(“2018-08-05”, “2018-08-03”) 得到天，得到月份 day(string date) Return type: int usage: day(“2018-08-05”) 得到星期英文 dayname(string date) Return type: string usage:dayname(“2018-08-05”) Sunday 得到這一天是這周的第幾天 dayofweek(string date) 1 (Sunday) to 7 (Saturday). Return type: int usage:dayofweek(“2018-08-06”) 加天數 days_add(timestamp startdate, int days) Return type: timestamp usage:days_add(now(),2) 減天數 days_sub(timestamp startdate, int days) Return type: timestamp usage:days_sub(now(), 2) 格式化日期 from_unixtime(bigint unixtime[, string format]) Return type: string 注意引數 usage:from_unixtime(1392394861,“yyyy-MM-dd”); 得到小時 hour(string date) Return type: int usage:hour(“2018-08-06 12:32:54”) 增加小時 hours_add(timestamp date, int hours) Return type: timestamp usage:hours_add(now(),2) 減少 hours_sub(timestamp date, int hours) Return type: timestamp usage:hours_sub(now(),2) 得到分鐘 minute(string date) Return type: int usage:minute(now()) 增加分鐘 minutes_add(timestamp date, int minutes) Return type: timestamp usage:minutes_add(now(),2) 減少分鐘 minutes_sub(timestamp date, int minutes) Return type: timestamp usage:minutes_sub(now(),2) 得到月份 month(string date) Return type: int usage:month(“2018-08-06 12:32:54”) 月份相加 months_add(timestamp date, int months) Return type: timestamp usage:months_add(now(),3) 減月份 months_sub(timestamp date, int months) Return type: timestamp months_sub(now(),3) 得到秒 second(string date) Return type: int 秒加 seconds_add(timestamp date, int seconds) Return type: timestamp 秒減 seconds_sub(timestamp date, int seconds) Return type: timestamp 得到日期 to_date(now()) 得到1970到今秒 unix_timestamp(), unix_timestamp(string datetime), unix_timestamp(string datetime, string format), unix_timestamp(timestamp datetime) Return type: bigint 得到這周是這年的多少周 weekofyear(string date) Return type: int usage:weekofyear(“2018-08-06 12:32:54”) 周加 weeks_add(timestamp date, int weeks) Return type: timestamp usage:weeks_add(“2018-08-06 12:32:54”, 1) 周減 weeks_sub(timestamp date, int weeks) Return type: timestamp usage:weeks_sub(“2018-08-06 12:32:54”, 1) 得到年 year(string date) Return type: int 年加 years_add(timestamp date, int years) Return type: timestamp 年減 years_sub(timestamp date, int years) Return type: timestamp