sql server 时间

sql server 获取月份天数：1，SELECT 32-DAY(CAST('2015-03-01' as datetime)+32-DAY(CAST('2015-03-01' as datetime)))

                                  2，SELECT 32-DAY(getdate()+32-DAY(getdate()))

                                  3，select convert(char(10),dateadd(d,-1,dateadd(m,1,CAST('2015-02-01' as datetime))),120)：2015-02-28

sql  server 行列转换：

select [2015-02-01],[2015-02-02],[2015-02-04],[2015-02-05] from WR_WATER_C
pivot
(
sum(USEWATER) for [SPTIME] in([2015-02-01],[2015-02-02],[2015-02-04],[2015-02-05])
)tbl
--where SEQ=601

时间转换成年月：

select CONVERT(varchar(7),SPTIME,120) from WR_WATER_C