This article describes the Excel date time function
1.DATE Purpose: Returns the serial number that represents a specific date. syntax: DATE (year,month,day) parameter: Year is one to four bits, the parameter is interpreted according to the date
Date and Time functionsThis chapter discusses some functions that can be used to manipulate time values. See section 11.3, "Date and Time type" for valid formats for each time and date type with a range and a specified value.
The following example
Collect the Compare full MySQL date and MySQL time function
Date_format (Date,format)
Formats the date value based on the format string. The following modifiers can be used in the format string:%m month name (January ...). December)
%w Week name
2.6 Date_sub/date_add
Date_sub (Date,interval expr type)
The date argument is a valid datetime expression. The expr parameter is the time interval that you want to add.
SELECT ID from my_table WHERE create_time >= date_sub (now (),
Get Current date + time (date + times) 1.1 function: Now ()
Related functions: Current_timestamp (), localtime (), Localtimestamp ()
An example is provided:
2. Get Current date
Function: Curdate ()
Related functions: Current_date (),
Objective
Since most of the Android beginner's tutorial doesn't teach you how to choose time, beginners encounter this kind of inevitable will be a bit overwhelmed, should let the user enter the date time? Not to say that the user experience is not
This paper mainly explains the analysis and summarization of time function in SQLite and gives the use case. The examples given in this article are all tested.SQLite Time/Date function type:1. DateTime (): Date and time of production2, Date ():
This article describes the PHP time function usage. Share to everyone for your reference, specific as follows:
PHP has a UNIX timestamp related operation function, easy to use
Time () returns the current Unix timestamp
Microtime--Returns the
Environment: MySQL Server 5.1
Problem: MySQL gets the system's current time function
Solve:
The now () function returns the current date time with ' Yyyy-mm-dd HH:MM:SS ', and can be saved directly to the DateTime field.
Curdate () returns today'
MySQL: Unix_timestamp (), Unix_timestamp (date)
If no parameters are invoked, a Unix timestamp (the number of seconds after the ' 1970-01-01 00:00:00 ' GMT) is returned as an unsigned integer. If you call Unix_timestamp () with date, it returns the
Date Time and typeCommon date and time typesBytesYear 1 represents the range of years values: (1901----2155)Date 4 is the date of year and month, for example: 2018-03-09 value range: 1000-01-01 to 9999-12-31Time 3 indicates a value range of seconds
Curdate (), current_date () returns the current date ' yyyy-mm-dd 'Curtime (), Current_time () returns the current time ' HH:MM:SS 'Current_timestamp ()LocalTime ()Now ()Sysdate () returns the current date and time ' Yyyy-mm-dd HH:MM:SS
Http://blog.sina.com.cn/s/blog_6d39dc6f0100m7eo.htmlFunctions and keywords are not case-sensitive in MySQL. The datetime parameter of the following function can be used either as a time string or as a time variable or an expression.First, get the
Date ("Y-m-d", Time ()) gets a string of times in a particular format. Time () is a timestamp value, or it can be omitted, the default current time. You can also fill in the value.All functions in PHP are in the Unix era, starting January 1, 1970.
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How to get the time? How accurate?A:1Use time_t time (time_t * timer) to be accurate to secondsCalculate the time difference using doubleDifftime (time_t timer1, time_t timer0)2When clock_t clock () is used, the CPU time is accurate to
You can understand that by using simple DATEDIFF and DATEADD functions, you can find many different dates that may be meaningful.
All the examples so far only calculate the number of time intervals between the current time and "", and then add
Fully collected MySQL date and MySQL 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
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