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Date Query

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    Date Query

    Hello

    I am trying to convert a week number and a year into a date.

    For example:

    Monday September 2nd 2019 = Week Number 38.


    Thanks you for your help. It is much appreciated.

    Kind regards

    Alex
    Database Software Solutions Limited
    www.dbasesolution.co.uk
    http://www.precise360.co.uk
    PRECISE360 -
    LYNCHPIN -

    #2
    Re: Date Query

    Hi Alex have a look at WEEK() ,WEEK_ISO() and WEEK_ISO_FULL() Functions in the documentation. They should point you in the right direction.

    Comment


      #3
      Re: Date Query

      Hello Lance

      Sorry, I made a mistake in explaining the query.

      The example should be
      38 2019 = I need to see 02/09/2019

      Thanks you for your help. It is much appreciated.

      Kind regards

      Alex
      Database Software Solutions Limited
      www.dbasesolution.co.uk
      http://www.precise360.co.uk
      PRECISE360 -
      LYNCHPIN -

      Comment


        #4
        Re: Date Query

        Oops wrong function..
        nth_dow()
        Last edited by Al Buchholz; 09-18-2019, 02:49 PM.
        Al Buchholz
        Bookwood Systems, LTD
        Weekly QReportBuilder Webinars Thursday 1 pm CST

        Occam's Razor - KISS
        Normalize till it hurts - De-normalize till it works.
        Advice offered and questions asked in the spirit of learning how to fish is better than someone giving you a fish.
        When we triage a problem it is much easier to read sample systems than to read a mind.
        "Make it as simple as possible, but not simpler."
        Albert Einstein

        http://www.iadn.com/images/media/iadn_member.png

        Comment


          #5
          Re: Date Query

          Misunderstood the question sorry
          Last edited by Allen Klimeck; 09-18-2019, 12:12 PM.

          Comment


            #6
            Re: Date Query

            Not if you only have the year and week number, Al. ( Unless of course I am talking rubbish.)

            For the sake of simplicity, I'd create a table with the week numbers and dates - either the start or end of the week as you wish - and do a lookup based on the week number.
            See our Hybrid Option here;
            https://hybridapps.example-software.com/


            Apologies to anyone I haven't managed to upset yet.
            You are held in a queue and I will get to you soon.

            Comment


              #7
              Re: Date Query

              Originally posted by Ted Giles View Post
              Not if you only have the year and week number, Al. ( Unless of course I am talking rubbish.)

              For the sake of simplicity, I'd create a table with the week numbers and dates - either the start or end of the week as you wish - and do a lookup based on the week number.
              Does bring up the issue of what date of the week is one looking for? First day through 7th day...

              A date is only one day. A week is seven days.
              Al Buchholz
              Bookwood Systems, LTD
              Weekly QReportBuilder Webinars Thursday 1 pm CST

              Occam's Razor - KISS
              Normalize till it hurts - De-normalize till it works.
              Advice offered and questions asked in the spirit of learning how to fish is better than someone giving you a fish.
              When we triage a problem it is much easier to read sample systems than to read a mind.
              "Make it as simple as possible, but not simpler."
              Albert Einstein

              http://www.iadn.com/images/media/iadn_member.png

              Comment


                #8
                Re: Date Query

                Yep, but week numbers are more of a universally agreed metric.
                If you lookup the process in Excel, you can set a range of 7 days to define a week.
                So, Mon - Sun is one week no., Sun -Sat is another.
                I think you can change the start and end days of the week.

                Interesting challenge though.
                See our Hybrid Option here;
                https://hybridapps.example-software.com/


                Apologies to anyone I haven't managed to upset yet.
                You are held in a queue and I will get to you soon.

                Comment


                  #9
                  Re: Date Query

                  So, what about
                  01/01/2019 + Week# times 7
                  See our Hybrid Option here;
                  https://hybridapps.example-software.com/


                  Apologies to anyone I haven't managed to upset yet.
                  You are held in a queue and I will get to you soon.

                  Comment


                    #10
                    Re: Date Query

                    Originally posted by Ted Giles View Post
                    So, what about
                    01/01/2019 + Week# times 7
                    Doesn't that give the date of the start of the next week?
                    Al Buchholz
                    Bookwood Systems, LTD
                    Weekly QReportBuilder Webinars Thursday 1 pm CST

                    Occam's Razor - KISS
                    Normalize till it hurts - De-normalize till it works.
                    Advice offered and questions asked in the spirit of learning how to fish is better than someone giving you a fish.
                    When we triage a problem it is much easier to read sample systems than to read a mind.
                    "Make it as simple as possible, but not simpler."
                    Albert Einstein

                    http://www.iadn.com/images/media/iadn_member.png

                    Comment


                      #11
                      Re: Date Query

                      Originally posted by alexmuir View Post
                      The example should be
                      38 2019 = I need to see 02/09/2019

                      Alex
                      This link says that week 38 of 2019 starts on 16 Sept 2019

                      http://week-number.net/calendar-with...bers-2019.html

                      This also begs the question of what day of the week 38 do you want? I see implied day 1 - ie Monday.
                      Al Buchholz
                      Bookwood Systems, LTD
                      Weekly QReportBuilder Webinars Thursday 1 pm CST

                      Occam's Razor - KISS
                      Normalize till it hurts - De-normalize till it works.
                      Advice offered and questions asked in the spirit of learning how to fish is better than someone giving you a fish.
                      When we triage a problem it is much easier to read sample systems than to read a mind.
                      "Make it as simple as possible, but not simpler."
                      Albert Einstein

                      http://www.iadn.com/images/media/iadn_member.png

                      Comment


                        #12
                        Re: Date Query

                        I think it need to be:

                        (FristDayOfTheYear + (Week# * 7)) - (7 + dow(FristDayOfTheYear)-1)) = FirstDayOfWeek#
                        Last edited by Allen Klimeck; 09-18-2019, 03:08 PM.

                        Comment


                          #13
                          Re: Date Query

                          how about
                          Code:
                          yearstart_iso(2019)+(38*7)

                          Comment


                            #14
                            Re: Date Query

                            Ted

                            Thank you for your assistance.

                            We have decided to pursue you advice of creating a table.

                            Thanks to everyone who offered suggestions.

                            Kind regards


                            Alex
                            Database Software Solutions Limited
                            www.dbasesolution.co.uk
                            http://www.precise360.co.uk
                            PRECISE360 -
                            LYNCHPIN -

                            Comment


                              #15
                              Re: Date Query

                              You are welcome.
                              It's probably easiest but the down side is that you will need to recreate one for next year.
                              Still, with the process done once, it should be relatively easy to replicate.
                              See our Hybrid Option here;
                              https://hybridapps.example-software.com/


                              Apologies to anyone I haven't managed to upset yet.
                              You are held in a queue and I will get to you soon.

                              Comment

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