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Select date, optional field 1, optional field 2, sum (type 1) Type 1, sum (Type 2) Type 2, sum (Type 3) Type 3, sum (Type 4) type 4, sum (type 5) type 5, sum (Type 6) type 6 from (selectto_date (to_char (date, yyyy-mm-dd), yyyy-mm-dd) date, optional field 1, optional field 2, count (primary key field) select date, optional field 1, optional field 2, sum (type 1) Type 1, sum (Type 2) type 2, sum (Type 3) Typ

April 24, 2008 System.DateTime.Now.ToString ("D"); 2008-4-24 System.DateTime.Now.ToString ("D"); April 24, 2008 16:30:15 System.DateTime.Now.ToString ("F"); April 24, 2008 16:30 System.DateTime.Now.ToString ("F"); 2008-4-24 16:30:15 System.DateTime.Now.ToString ("G"); 2008-4-24 16:30 System.DateTime.Now.ToString ("G"); 16:30:15 System.DateTime.Now.ToString ("T"); 16:30 System.DateTime.Now.ToString ("T"); April 24, 2008 8:30:15 System.DateTime.Now.ToString ("U");

arraysDate.prototype.DatePart Partial information of the date takenDate.prototype.MaxDayOfDate the maximum number of days in the month in which the date is takenDate.prototype.WeekNumOfYear the week of the year in which the date is judgedStringtodate String to date typeIsvaliddate Verifying date ValidityCheckdatetime Full date and time checkDaysbetween Date Days DifferenceJS Code://---------------------------------------------------Judging leap years//-------------------------------------------

FormattingDATE.PROTOTYPE.DATEADD Date CalculationDate.prototype.DateDiff Comparison Date DifferenceDate.prototype.toString Date to StringDate.prototype.toArray date split into arraysDate.prototype.DatePart Partial information of the date takenDate.prototype.MaxDayOfDate the maximum number of days in the month in which the date is takenDate.prototype.WeekNumOfYear the week of the year in which the date is judgedStringtodate String to date typeIsvaliddate Verifying date ValidityCheckdatetime Full

arraysDate.prototype.DatePart Partial information of the date takenDate.prototype.MaxDayOfDate the maximum of the month in which the date is takenDate.prototype.WeekNumOfYear the week of the year in which the date is judgedStringtodate String to date typeIsvaliddate Verifying date ValidityCheckdatetime Full date and time checkDaysbetween Date Days DifferenceJS Code://---------------------------------------------------Judging leap years//---------------------------------------------------Date.pr

Date.prototype.isLeapYear Judge Leap Year Date.prototype.Format Date format DATE.PROTOTYPE.DATEADD Date Calculation Date.prototype.DateDiff Comparison Date Difference Date.prototype.toString Date-turn string Date.prototype.toArray date split into arrays Date.prototype.DatePart some information about the date Date.prototype.MaxDayOfDate the maximum number of days of the month from which the date is taken Date.prototype.WeekNumOfYear the first weeks of the year in which the date is judged String

information about the date Date.prototype.MaxDayOfDate the maximum number of days of the month from which the date is taken Date.prototype.WeekNumOfYear the first weeks of the year in which the date is judged Stringtodate String Turn Date type Isvaliddate Validation Date Validity Checkdatetime Full Date Time check Daysbetween Date Days Bad JS Code: //--------------------------------------------------- Judging leap years //--------------------------------------------------- Date.prototype.is

listDate.prototype.isLeapYear Judge Leap YearDate.prototype.Format Date formatDATE.PROTOTYPE.DATEADD Date CalculationDate.prototype.DateDiff Comparison Date DifferenceDate.prototype.toString Date-turn stringDate.prototype.toArray date split into arraysDate.prototype.DatePart some information about the dateDate.prototype.MaxDayOfDate the maximum number of days of the month from which the date is takenDate.prototype.WeekNumOfYear the first weeks of the year in which the date is judgedStringtodate

)); } //---------------------------------------------------//Date format //Format yyyy/yyyy/yy/yy = year //mm/m Month W/W Week //dd/dd/d/d date //hh/hh/h/h time //mm/m minutes //ss/ss/s/s sec //-------------------------------- ------------------- Date.prototype.Format = function (formatstr) {var str = formatstr; var Week = [' Day ', ' one ', ' two ', ' three ', ' four ', ' five ', ' six ']; str

(){Return (0==this.getyear ()%4 (This.getyear ()%100!=0) | | (This.getyear ()%400==0));} //---------------------------------------------------Date formattingFormat Yyyy/yyyy/yy/yy represents yearMm/m MonthW/W Weekdd/dd/d/d Datehh/hh/h/h timemm/m minutesSS/SS/S/S seconds//---------------------------------------------------Date.prototype.format = function (FORMATSTR){var str = FORMATSTR;var week = [' Day '

, month, day, hour, minute, second * (11) Date. prototype. datePart: Obtain Date data information * // *** verify Date validity: Determine whether dataStr meets the Date format specified by formatStr * example: * (1) alert (Date. isValiDate ('1970-02-29 ', 'yyyy-MM-dd'); // true * (2) alert (Date. isValiDate ('aaaa-58-29 ', 'yyyy-MM-dd'); // false * dateStr: required, date string * formatStr: optional, form