datediff

Business Background: for example, data center management. You can set a special period of time for each day. You can set a discount between and, and a discount between and, off from PM to PM, Since my business is not cross-day, it must be clear.

DateDiff function Returns a Variant (long) that represents the number of time intervals between two specified dates. Grammar DateDiff (interval, date1, date2[, firstdayofweek[, FirstWeekOfYear]) The following named arguments are in the

---restore content starts---All data for Today: SELECT * FROM table name where DateDiff (dd,datetime Type field, GETDATE ()) =0All data yesterday: SELECT * from table name where DateDiff (dd,datetime Type field, GETDATE ()) =1All data within 7 days:

Records reprinted from: Http://www.cnblogs.com/suruozhong/p/5974595.htmlall data for today: SELECT * FROM table name where DateDiff (dd,datetime Type field, GETDATE ()) =0 all data for yesterday: SELECT * from table name where DateDiff (DD, DateTime

--本周第一天   SELECTDATEADD(Day,1-(DATEPART(Weekday,getdate())[email protected]@DATEFIRST-1)%7,getdate())  --or   selectdateadd(wk, datediff(wk,0,getdate()), 0)  --本周第一天   selectdateadd(wk, datediff(wk,0,getdate()), 6)     --上月第一天   SELECTCONVERT(CHAR(10

One, Time functionWhen you use stored procedures, SQL functions, you encounter some processing of time. such as the acquisition of time and the addition and subtraction. In this case, the SQL comes with the time function. Below I list these

All data for Today: SELECT * FROM table name where DateDiff (dd,datetime Type field, GETDATE ()) =0All data yesterday: SELECT * from table name where DateDiff (dd,datetime Type field, GETDATE ()) =1All data within 7 days: SELECT * from table name

The date () function gets the dates, The time () function gets the times.The now () function can get the current date plus time. Now () gets the current system date and time, the ASP output can be written like this: Years (now ()) Gets the year, ASP

A1, select Update_date, convert (varchar (), update_date,111) JJ, CONVERT (varchar (), update_date,8) AA from Report_ Month//update_date is a datetime type and results are shown as:Update_date JJ AA2007-01-06 16:14:50.437 2007/01/06 16:14:50Select

Read Catalogue Get Current Month Day Ways to get a variety of dates function parameters/Functions Back to TopGet current Month daySelect MONTH (GETDATE ()) 6 Year () gets yearsDay () Get dateSelect Day

Date function Description: returns the current system date. Syntax: Date Dateadd FunctionDescription: return the date of the specified interval that has been added.Syntax: dateadd (interval, number, date)Interval: required. String expression,

Copy codeThe Code is as follows: public static string DateDiff (DateTime DateTime1, DateTime DateTime2) { String dateDiff = null; Int date = 0; Try { Int year = Convert. ToInt32 (DateTime2.ToString ("yyyy")-Convert. ToInt32 (DateTime1.ToString

Note: copy a table (only copy structure, source table name: a new table name: B)Select * into B from a where 1 <> 1 Description: copy a table (copy data, source table name: a target table name: B)Insert into B (a, B, c) select d, e, f from B;

Calculating the time difference in PHP is sometimes a hassle! But as long as you've mastered the use of datetime functions, that's a simple thing to do. Recently in the study of their love scarf to calculate the number of days of love, which

The first day of a monthSQLScript: Select dateadd (mm, datediff (mm, 0, getdate (), 0) Monday of this week Select dateadd (wk, datediff (wk, 0, getdate (), 0) The first day of a year Select dateadd (YY, datediff (YY, 0, getdate (), 0)

Date function Description: Returns the current system date. Syntax: Date DATEADD function Description: Returns the date when the specified time interval has been added. Syntax: DateAdd (interval, number, date) Interval: Must choose. A string

Description: Copy table (copy only structure, source table name: A new table name: b)SELECT * into B from a where 1<>1 Description: Copy table (copy data, source table name: A target table name: b)Insert into B (A, B, c) select d,e,f from B;

Date functionDescription: Returns the current system date.Syntax: Date DATEADD functionDescription: Returns the date when the specified time interval has been added.Syntax: DateAdd (interval, number, date)Interval: Must choose. A string expression

Function /* Every function has only one sentence! In fact, from another blog I dug out: T-SQL generates two new true Gregorian calendars Http://blog.csdn.net/playyuer/archive/2004/04/07/2860.aspx T-SQL generates a simple Gregorian calendar T-SQL

1. The first day of one monthsSELECT DATEADD (mm, DATEDIFF (Mm,0,getdate ()), 0) 2. Monday of this weekSELECT DATEADD (wk, DATEDIFF (Wk,0,getdate ()), 0) 3. The first day of the yearSELECT DATEADD (yy, DATEDIFF (Yy,0,getdate ()), 0) 4. First day of