sql中datepart和datename函数

例子select datename(weekday,getdate())

      select datepart(weekday,getdate())--返回的是时间类型

日期部分	缩写
year	yy, yyyy
quarter	qq, q
month	mm, m
dayofyear	dy, y
day	dd, d
week	wk, ww
weekday	dw
Hour	hh
minute	mi, n
second	ss, s
millisecond	ms