sql得到当前系统时间得 日期部分
convert(varchar(10),getdate(),120)
昨天
select convert(varchar(10),getdate() – 1,120)
明天
select convert(varchar(10),getdate() + 1,120)
最近七天
select * from tb where 时间字段 >= convert(varchar(10),getdate() – 7,120)
随后七天
select * from tb where 时间字段 <= convert(varchar(10),getdate() + 7,120) and 时间字段 >= 时间字段
上月
select * from tb where month(时间字段) = month(getdate()) – 1
本月
select * from tb where month(时间字段) = month(getdate())
下月
select * from tb where month(时间字段) = month(getdate()) + 1
–昨天
select * from tablename where datediff(dd, datetimcol, getdate()) = 1
–明天
select * from tablename where datediff(dd, getdate(), datetimcol) = 1
–最近七天
select * from tablename where datediff(dd, datetimcol, getdate()) <= 7
–随后七天
select * from tablename where datediff(dd, getdate(), datetimcol) <= 7
–上周
select * from tablename where datediff(wk, datetimcol, getdate()) = 1
–本周
select * from tablename where datediff(wk, datetimcol, getdate()) = 0
–下周
select * from tablename where datediff(wk, getdate(), datetimcol ) = 1
–上月
select * from tablename where datediff(mm, datetimcol, getdate()) = 1
–本月
select * from tablename where datediff(mm, datetimcol, getdate()) = 0
–下月
select * from tablename where datediff(mm, getdate(), datetimcol ) = 1
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本周
select * from tb where datediff(week , 时间字段 ,getdate()) = 0
上周
select * from tb where datediff(week , 时间字段 ,getdate()) = 1
下周
select * from tb where datediff(week , 时间字段 ,getdate()) = -1
纯数字时间这样转换
and datediff(mm,getdate(),convert(datetime,convert(nvarchar,
substring(convert(varchar(100),yl01),0,9),20))) <=3