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  4. Select query from datetime field [modified]

Select query from datetime field [modified]

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databasecsharpsql-serverlinqsysadmin
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  • L Luc Pattyn

    treuveni wrote:

    p.EndTime

    :confused:

    Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles] Nil Volentibus Arduum

    Please use <PRE> tags for code snippets, they preserve indentation, and improve readability.

    T Offline
    T Offline
    treuveni
    wrote on last edited by
    #5

    Luc Pattyn wrote:

    p.EndTime

    I wrote it with LINQ, not with ADO.NET

    L 1 Reply Last reply
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    • T treuveni

      Luc Pattyn wrote:

      p.EndTime

      I wrote it with LINQ, not with ADO.NET

      L Offline
      L Offline
      Luc Pattyn
      wrote on last edited by
      #6

      treuveni wrote:

      I wrote it with LINQ, not with ADO.NET

      So? I see StartDate and EndTime. Is that what you intend? :)

      Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles] Nil Volentibus Arduum

      Please use <PRE> tags for code snippets, they preserve indentation, and improve readability.

      T 1 Reply Last reply
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      • L Luc Pattyn

        treuveni wrote:

        I wrote it with LINQ, not with ADO.NET

        So? I see StartDate and EndTime. Is that what you intend? :)

        Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles] Nil Volentibus Arduum

        Please use <PRE> tags for code snippets, they preserve indentation, and improve readability.

        T Offline
        T Offline
        treuveni
        wrote on last edited by
        #7

        Yes, i made a mistake at the column name when i created the DB, it's not the point here. :)

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        • T treuveni

          Hi, I'm trying to create select query (with LINQ) that's checking if a row is already exists in a table (SQL SERVER). this is the query: var query = from p in dc.OnLineDuties where p.StartDate == start p.EndTime == end select p; return query.ToList(); the tamplate is - "yyyy-mm-dd hh:mm:ss" But i'm not getting any result. Here are the values from the DB: StartDate 2010-11-01 09:00:00.000 EndDate 2010-11-01 10:00:00.000 What i'm doing wrong??? Please assist...

          modified on Sunday, November 7, 2010 6:28 AM

          P Offline
          P Offline
          phil o
          wrote on last edited by
          #8

          I guess there's a mistake in the formulation of your Linq query. This should be :

          var query = from p in dc.OnLineDuties
          where p.StartDate == start && p.EndTime == end
          select p;

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          • T treuveni

            Mark Nischalke wrote:

            You most likely want to check the dates between the start and end dates, not checking for an exact match as you are doing.

            No, i want to check if the specific date is already in the DB, if not - then i'll insert the row.

            N Offline
            N Offline
            Not Active
            wrote on last edited by
            #9

            In your DB you have StartDate and EndDate. Where is p.EndTime coming from? What is end? Is it a string, a datetime? ??


            I know the language. I've read a book. - _Madmatt

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            • P phil o

              I guess there's a mistake in the formulation of your Linq query. This should be :

              var query = from p in dc.OnLineDuties
              where p.StartDate == start && p.EndTime == end
              select p;

              T Offline
              T Offline
              treuveni
              wrote on last edited by
              #10

              Nop, it's dosen't works. I'm still getting 0 row results from the query. :(

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              • T treuveni

                Nop, it's dosen't works. I'm still getting 0 row results from the query. :(

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                R Offline
                Rhys Gravell
                wrote on last edited by
                #11

                Are you sure such a row exists?

                Rhys "With no power comes no responsibility"

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                • R Rhys Gravell

                  Are you sure such a row exists?

                  Rhys "With no power comes no responsibility"

                  T Offline
                  T Offline
                  treuveni
                  wrote on last edited by
                  #12

                  goblinTech wrote:

                  Are you sure such a row exists?

                  Sure. Here are the two rows from my DB:

                  DutyId PersonId StartDate EndTime
                  124 37 2010-11-01 09:00:00 2010-11-01 10:00:00
                  152 37 2010-09-01 19:00:00 2010-09-01 22:00:00

                  and still, this query dosen't return any results.

                  modified on Tuesday, November 9, 2010 1:53 AM

                  T 1 Reply Last reply
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                  • T treuveni

                    goblinTech wrote:

                    Are you sure such a row exists?

                    Sure. Here are the two rows from my DB:

                    DutyId PersonId StartDate EndTime
                    124 37 2010-11-01 09:00:00 2010-11-01 10:00:00
                    152 37 2010-09-01 19:00:00 2010-09-01 22:00:00

                    and still, this query dosen't return any results.

                    modified on Tuesday, November 9, 2010 1:53 AM

                    T Offline
                    T Offline
                    treuveni
                    wrote on last edited by
                    #13

                    Can some-one please help me why my query doesn't works? var query = from p in dc.OnLineDuties where p.StartDate == start p.EndTime == end select p; Here are the two rows from my DB: DutyId PersonId StartDate EndTime 124 37 2010-11-01 09:00:00 2010-11-01 10:00:00 152 37 2010-09-01 19:00:00 2010-09-01 22:00:00

                    R 1 Reply Last reply
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                    • T treuveni

                      Can some-one please help me why my query doesn't works? var query = from p in dc.OnLineDuties where p.StartDate == start p.EndTime == end select p; Here are the two rows from my DB: DutyId PersonId StartDate EndTime 124 37 2010-11-01 09:00:00 2010-11-01 10:00:00 152 37 2010-09-01 19:00:00 2010-09-01 22:00:00

                      R Offline
                      R Offline
                      Rhys Gravell
                      wrote on last edited by
                      #14

                      To expand on something Mark Nischalke asked some time ago to which you never replied, what is start, what is end? Are they string's, are they datetime's, what are there values at runtime?

                      Rhys "With no power comes no responsibility"

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                      • R Rhys Gravell

                        To expand on something Mark Nischalke asked some time ago to which you never replied, what is start, what is end? Are they string's, are they datetime's, what are there values at runtime?

                        Rhys "With no power comes no responsibility"

                        T Offline
                        T Offline
                        treuveni
                        wrote on last edited by
                        #15

                        goblinTech wrote:

                        what is start, what is end?

                        they are DateTime's.

                        goblinTech wrote:

                        what are there values at runtime?

                        the user inserts the value trough text box and i parse it to a DateTime type. at the end the become dd/MM/yyyy hh:mm:ss formt. The colums ype is also DateTime. 10x

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                        • T treuveni

                          goblinTech wrote:

                          what is start, what is end?

                          they are DateTime's.

                          goblinTech wrote:

                          what are there values at runtime?

                          the user inserts the value trough text box and i parse it to a DateTime type. at the end the become dd/MM/yyyy hh:mm:ss formt. The colums ype is also DateTime. 10x

                          R Offline
                          R Offline
                          Rhys Gravell
                          wrote on last edited by
                          #16

                          But what are the values of start and end at runtime? Can you debug and check?

                          Rhys "With no power comes no responsibility"

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                          • R Rhys Gravell

                            But what are the values of start and end at runtime? Can you debug and check?

                            Rhys "With no power comes no responsibility"

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                            T Offline
                            treuveni
                            wrote on last edited by
                            #17

                            The values are: StartDate - 2010-11-01 09:00:00 EndTime - 2010-11-01 10:00:00 same like in the DB

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