获取Marklogic中选定日期的月份的第一天和最后一天的日期

时间:2018-09-03 10:48:23

标签: date xquery marklogic marklogic-8

我正在尝试使用MarkLogic获取任何选定日期的第一天和最后一天日期。
示例:

let $date := xs:date("2018-08-24")      
let $firstDay := "*Should be 1st day of month - of $date*"  
let $lastDay := "*Should be last day of month - of $date*"  
return ("$firstDay:",$firstDay,"$lastDay:",$lastDay)

预期的输出日期:

  • $firstDay: 2018-08-01
  • $lastDay: 2018-08-31

我可以使用 functx:month-first-of-month($ date) functx:每月的最后一天($ date),但我想知道 MarkLogic

是否提供了任何API或替代选项

1 个答案:

答案 0 :(得分:2)

您可以使用标准XQuery duration arithmetic直接计算该值:

let $date := xs:date("2018-08-24")

let $one-day := xs:dayTimeDuration('P1D')
let $one-month := xs:yearMonthDuration('P1M')
(: subtract days to get to the 1st of the month :)
let $firstDay := $date - (fn:day-from-date($date) - 1) * $one-day
(: get the 1st of the next month and then subtract one day :)
let $lastDay  := $firstDay + $one-month - $one-day

return ("$firstDay:",$firstDay,"$lastDay:",$lastDay)