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表名为：tableName
时间字段名为：theDate
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datePart函数
| 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 |
查询本日的记录
select * from tableName where DATEPART(dd, theDate) = DATEPART(dd, GETDATE()) and DATEPART(mm, theDate) = DATEPART(mm, GETDATE()) and DATEPART(yy, theDate) = DATEPART(yy, GETDATE())
查询本周的记录
select * from tableName where DATEPART(wk, theDate) = DATEPART(wk, GETDATE()) and DATEPART(yy, theDate) = DATEPART(yy, GETDATE())
查询本月的记录
select * from tableName where DATEPART(mm, theDate) = DATEPART(mm, GETDATE()) and DATEPART(yy, theDate) = DATEPART(yy, GETDATE())
查询本季的记录
select * from tableName where DATEPART(qq, theDate) = DATEPART(qq, GETDATE()) and DATEPART(yy, theDate) = DATEPART(yy, GETDATE())
查询本年的记录
select * from tableName where DATEPART(yy, theDate) = DATEPART(yy, GETDATE())
其中:GETDATE()是获得系统时间的函数。
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datediff函数
| 日期部分 | 缩写 |
|---|---|
| year | yy, yyyy |
| quarter | qq, q |
| Month | mm, m |
| dayofyear | dy, y |
| Day | dd, d |
| Week | wk, ww |
| Hour | hh |
| minute | mi, n |
| second | ss, s |
| millisecond | ms |
查询本日的记录
select count(*) from tableName where (DATEDIFF(dd, theDate, GETDATE()) = 0)
查询本周的记录
select count(*) from tableName where (DATEDIFF(wk, theDate, GETDATE()) = 0)
查询本月的记录
select count(*) from tableName where (DATEDIFF(mm, theDate, GETDATE()) = 0)
查询本季的记录
select count(*) from tableName where (DATEDIFF(qq, theDate, GETDATE()) = 0)
查询本年的记录
select count(*) from tableName where (DATEDIFF(yy, theDate, GETDATE()) = 0)
原始文章：http://blog.csdn.net/coolwzjcool/archive/2007/08/25/1758470.aspx
