subtract one date from another

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

Using date types in PL/SQLThe previous article described the use of strings and numbers in PL/SQL. There is no doubt that strings and numbers are important, but you can be sure that no application is dependent on the date.You need to record events,

SelectTimediff ('23:40:00','18:30:00'); --subtract two time select substring (Timediff ('23:40:00','18:30:00'),1,5) ----“ to：Ten"Subtract back hours: minutesSelectDateDiff'2008-08-08','2008-08-01'); --7-----Two date subtractionSelectTo_days ('2008-09

Working with Dates in PL/SQL (date used in PL/SQL) The previous articles in this introductory PL/SQL series focused on working with strings and numbers in PL/SQL-based applications. without a doubt, strings and numbers are important, but it is

When I used to solve this problem with ASP is quite simple, the ASP has the corresponding function DateDiff can give two days period interval How many months, how many days and how many seconds. When I searched through the PHP manual I found that

Use the function date () to implement the displayed in the format: year-month-day hours: minutes: secRelated Time parameters:A-"AM" or "PM"A-"AM" or "PM"D-A few days, two digits, if less than two digits before the 0; such as: "01" to "31"D-Days of

This article contains the following elements: 1, get the current date and time-how many ways do we have? 2, change the date display mode-date and time display form 3, the conversion of the current date is a Unix timestamp value 4. Change Date A.

The direct subtraction of functions is not correct, you need to do this: * * Get the current date and time In Unix, time is represented by the number of seconds that have elapsed since 0 o'clock January 1, 1970, which is called the Unix timestamp (

creation of a JavaScript date object Create a Date object:var objdate=new Date ([arguments list]);I have summarized the following 3 types of parametric forms:New Date ("month DD yyyy hh:mm:ss");The following hh:mm:ss is optional (the

Creation of a JavaScript date object Create a Date object:var objdate=new Date ([arguments list]);I have summarized the following 3 types of parametric forms:New Date ("month DD yyyy hh:mm:ss");The following hh:mm:ss is optional (the