sql server datediff minutes and seconds

Learn from:http://bjtdeyx.iteye.com/blog/1447300The most common statements for SQL date queries -- query data on the first anniversary of the date of the day select * from shoporder where datediff (Week,ordtime,getdate () - 1 ) = 0 --

Datediff usage in SQL Server Datediff function [Date and Time] FunctionReturns the interval between two dates. SyntaxDatediff (date-part, date-expression-1, date-expression-2) Date-part:Year | quarter | month | week | Day | hour | minute |Second |

Address: http://sunboyyyl.blog.163.com/blog/static/224738120112874910613/ Datediff function [Date and Time] Function: returns the interval between two dates. SyntaxDatediff (date-part, date-expression-1, date-expression-2) Date-part: Year |

DATEDIFF function [date and time]The function returns the interval between two dates.Grammar DATEDIFF (Date-part, date-expression-1, date-expression-2)Date-part:year | Quarter | Month | Week | Day | Hour | Minute | Second | MillisecondThe parameter

Returns a time interval between two dates. GrammarDateDiff (interval, date1, date2 [, firstdayofweek][, FirstWeekOfYear]])The syntax for the DATEDIFF function has the following parameters:Parameter Description Interval must be selected. A string

Select GETDATE () as ' current date ',Datename (Year,getdate ()) as ' year ',Datename (Month,getdate ()) as ' month ',Datename (Day,getdate ()) as ' Day ',Datename (Dw,getdate ()) as ' Week ',Datename (Week,getdate ()) as ' Week number ',Datename

Select Day (createtime) from Life_unite_product--the days value of the Take time fieldSelect Month (createtime) from Life_unite_product--take the month value of the Time fieldSelect year (createtime) from Life_unite_product--the yearly value of the

Server Date functionDefinition and usageThe DATEDIFF () function returns the number of days between two dates.GrammarDATEDIFF (datepart,startdate,enddate)The startdate and enddate parameters are valid date expressions.The datepart parameter can be

The DATEDIFF () function returns the number of days between two dates.SyntaxDATEDIFF (datepart, startdate, enddate)The startdate AND enddate parameters are valid date expressions.You need to know how many days the difference between a specified date

1 /**2 * Calculate the difference of two time, the number of days, years, months, minutes, number of seconds3 * 4 * @paramDatetype The type of difference between two times to get, for example, the number of days to get a two time difference? or