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returned when the argument to the MONTH () function is an integer, that is, SQL Server considers itsis January 1900.· Year ()The year () function syntax is as follows:Year (The year () function returns the years value in Date_expression.Reminder: When using a date function,
months of April 15, 2018Select Add_month (to_date (' 2018-4-15 ', ' Yyyy-mm-dd '), 1) from dual;4) Month_between (P1,P2) calculates the month of the difference between the two dates P1 and P2, there will be a fractional case, calculate p1-p2.Eg: Calculates the month in which the current system time differs from the date of birth, and retains one decimal place.Select Round (Month_between (sysdate,to_date ('
'), today is the week of =datename (weekday, ' 2004-10-15 ')function parameters/FunctionsGetDate () returns the current date and time of the systemDateDiff (INTERVAL,DATE1,DATE2) returns the difference between Date2 and date1 two dates in the interval specified date2-date1DATEADD (interval,number,date) with the
(@m+1 as varchar) + '-15 ')--29To query the record data between a date:SELECT * FROM table where start time > ' 2005-02-01 ' and End time Query the record data in the last 30:SELECT * FROM table where DATEDIFF (Dd, Date field, GETDATE ()) Query for record data with Ctr greater than 100 in the last week:SELECT * FROM table where hit_count>100 and DateDiff (Dw, Date field, GETDATE ()) determines whether a
value of a lowercase morning or afternoon
The value of a capital morning or afternoon
G 12-hour system without leading 0
G 24-hour system without leading 0
H 12-hour system with leading 0
H 24-hour system with leading 0
I have the number of minutes leading 0
S number of seconds with leading 0
U milliseconds, the date () function returns the 000000 format of the
E Time Zone identification
I is daylight savi
The UDF date processing function based on Python function1, based on the recent study of Python, is to try Python for a date processing UDF function output, the pro-test can be uploaded to hive for use. Learn to use Python crawlers to crawl the Yellow pages, and try to cheat on the amount of reading (laughter). Finally
, with leading 1 to 12H-hour, 24-hour format, with leading 000 to 23I have a leading zero minute number 00 to 59>S number of seconds, with leading 000 to 59>E Time zone identifier (PHP 5.1.0 new) Example: Utc,gmt,atlantic/azoresI is daylight saving time if daylight saving time is 1, otherwise 0O hours of difference from GMT for example: +0200The difference between P and GMT (GMT) is separated by a colon bet
how many weeks of the year =datename (week, ' 2004-10-15 ') , today is a few weeks =datename (weekday, ' 2004-10-15 ') Second, function parameters/functions GetDate () returns the current date and time of the system DateDiff (INTERVAL,DATE1,DATE2) returns the difference between Date2 and date1 two dates in the interval specified way Date2-date1 DATEADD (interval
The General direct new Date () is not a compatibility issue, and the new date (datetimeformatstring) often has browser compatibility issues, why some format browsers in datetimeformatstring are incompatible.1. No reference// no reference all browsers are compatible var New Date ();2. Date parameters//
Turn from: http://my.oschina.net/beer/blog/29832
Date Time Script Library method list Date.prototype.isLeapYear judgment Leap year Date.prototype.Format date format Date.prototype.DateAdd Date calculation Date.prototype.DateDiff Comparison Date Difference Date.prototype.toS
Before we know that SQL has the DateDiff () function, we need to calculate the date and time difference. I will directly put it in a program like php, asp, and asp.net for calculation, now I will share with you how to use the DateDiff function to add or subtract a date plan.
When processing log data, often to calculate the date, such as Date plus days, date difference days, the date of the week, etc., this article collects several commonly used Python date functio
Date ("January 12,2006");New Date (2006,0,12,22,19,35);New Date (2006,0,12);New Date (1137075575000);Date () Returns the day and time.GetDate () Returns the day of the one month (1 ~ 31) from the Date object.GetDay () Returns the
SetLocale () mktime ()GetDate Get time and date information.Syntax: array getdate (int timestamp);return value: ArrayFunction Type: time dateContent description The elements that return an array include the following items:"Seconds"-seconds"Minutes"-min"Hours"-when"Mday"-Day of the month"Wday"-the number of days of the week"Mon"-month numbers"Year"-years, numbers"Yday"-Number of days of the year; such as: "299""Weekday"-full name of the week; such as:
SQL Server table-valued function and scalar-valued function define the way and call difference
SQL stored procedures often need to call some functions to make the process more reasonable, you can also make functions more reusable, but when writing SQL functions you may find that some functions are written under a table-valued
The date function of JS is very powerful. Usually used.First get the current date:var curdate = new Date (), var year = Curdate.getfullyear (); Year (four-digit example:) var Month = Curdate.getmonth () +1; Month 0~11var day = Curdate.getdate (); Get the number 1~31var week = Curdate.getday (); Get weeks 0~6 Explanation: 0 is Sunday 1 is MondaySo we can get to th
The following table lists the most important built-in date functions in MySQL:
function
Description
Now ()
Returns the current date and time
Curdate ()
Returns the current date
Curtime ()
Returns the current time
One, time lag
DateDiff: To put it bluntly is to use the first time to reduce the second time, the order can not forget
The code is as follows
Copy Code
Select DateDiff (' 2012-08-08 ', ' 2012-08-13 '); ---5
Second, get the current time
The code is as follows
Copy Code
NowCurrent_timestamp (), Current_timestamp, LocalTime (), localtime, Localtimestamp--(v4.0.6), Localtimestamp ()--(v4.0.6)
Sysdate (); Dynamic acquisiti
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