The time functions in SQL are very useful, especially when we perform initial assignment and complex queries.
1. Obtain the current system timeSelect getdate ()
2. datename(Datepart, date) returns a string that represents the specified date part
MySQL Date and Time Functions (1)Author: mr. ZhangMySQL Date and Time StyleThere are many useful date and time functions in MySQL. We often see that a lot of calculations that are applied to date are in the codeBut they can actually use the built-in
This article provides several php functions for getting the current time, such as date and time. It also shows me how to solve the time zone problem.
Php tutorial to obtain the current time functionThis article provides several php functions for
Time functions. There are some time functions in PHP: (1) date usage: date (format, [time]); if there is no time parameter, the current time is used. the format is a string. The following characters have special meanings: the time functions in PHP
PhpMysql date and time functions
DATE_FORMAT (date, format)
Format the date value based on the format string. The following modifier can be used in the format string: % M month name (January ...... December)
% W name of the week (Sunday ......
PHP datetime function Date () 1, year-month-day echo date (' Y-m-j '), 2007-02-6 echo date (' Y-n-j '), 07-2-6 uppercase Y for year four digits, and lowercase y for year two digits, and lowercase m for month numbers ( With a leading), while
Date-time functions are a core part of PHP. These functions can be used without installation. The specific use of the date function is described in detail below:
PHP Date () functionThe PHP date () function formats the timestamp as a date and time
Copy codeThe Code is as follows:// JavaScript Document//---------------------------------------------------// Determine the leap year//---------------------------------------------------Date. prototype. isLeapYear = function (){Return (0 = this.
Questions about time programming under Linux:1. Time-related structures under Linuxstruct Timeval{int tv_sec;int tv_usec;};Where Tv_sec is the number of seconds from the beginning of the morning, Tv_usec is microseconds (10E-6 second).struct
One, the PHP timestamp function gets the UNIX timestamp of the specified date Strtotime ("2009-1-22″) example is as follows:Echo strtotime ("2009-1-22″) Results: 1232553600Description: Return January 22, 2009 0:0 0 seconds timestampTwo, php
one, Time ()-- returns the current Unix time Stamp$nextWeek = time () + (7 * 24 * 60 * 60);Echo ' Next Week: '. Date (' y-m-d ', $nextWeek). " \ n ";Second, mktime ( hours/ minute/ sec/ month/ day/ year)-- get a date for Unix time Stampecho Date ("M-
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
Implements the definition of the class, and calls the
Clock the header file of the time class Clock.h
#pragma once
#ifndef _clock_h_
#define _CLOCK_H_
class CLOCK
{public
:
void Init (int hour, int minute, int second);
void Display (
2008-07-08 15:30 private int DatePart(System.DateTime dt) { int weeknow = Convert.ToInt32(dt.DayOfWeek);//今天星期几 int daydiff = (-1) * (weeknow+1);//今日与上周末的天数差 int days = System.DateTime.Now.AddDays (daydiff).DayOfYear;//上周末是本年第几天 int weeks = days/7;
String functions1. Capitalization conversion--upper converted into uppercase--lower converted to lowercaseSelect Upper (' AsaR ')2. Length--len wordsNumber of--datalength bytes3. Remove space before and after--rtrim Remove the right space--ltrim
1. Current system date, time
Select GETDATE ()
2. DateAdd returns a new datetime value on the basis of adding a period of time to the specified date
For example: Add 2 days to date
Select DATEADD (day,2, ' 2004-10-15 ')--back: 2004-10-17 00:00:00.000
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