mysql 时间差问题集锦
SELECT * from grouptoadd where taskid = '103244';
select datediff(max(spreadtime),min(createtime)) from grouptoadd where taskid = '103244';
-- 【mysql】时间差
SELECT TIMESTAMPDIFF(DAY, createtime ,spreadtime) AS `DAY` from grouptoadd where taskid = '103244';
SELECT TIMESTAMPDIFF(HOUR, createtime ,spreadtime) AS `HOUR` from grouptoadd where taskid = '103244';
SELECT TIMESTAMPDIFF(MINUTE, createtime ,spreadtime) AS `MINUTE` from grouptoadd where taskid = '103244';
SELECT TIMESTAMPDIFF(SECOND, createtime ,spreadtime) AS `Second` from grouptoadd where taskid = '103244';
如果一件事情你觉得难的完不成,你可以把它分为若干步,并不断寻找合适的方法。最后你发现你会是个超人。不要给自己找麻烦,但遇到麻烦绝不怕,更不要退缩。
电工查找电路不通点的最快方法是:分段诊断排除,快速定位。你有什么启示吗?
求知若饥,虚心若愚。
当你对一个事情掌控不足的时候,你需要做的就是“梳理”,并制定相应的规章制度,并使资源各司其职。