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Trouble filtering a grid by date

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  • Trouble filtering a grid by date

    I am looking for a way to filter a grid using some math on a date field. The table is from a MariaDB database and has a field called Session5 which is a date field.

    I have this command in a grid:
    SELECT *, concat(time_start, ' - ', time_end) AS times, concat(member.title, ' ', member.first_name, ' ', member.last_name) AS instructorname, course_schedule.course_sked_id AS Books
    FROM (course_schedule course_schedule
    INNER JOIN course course
    ON course_schedule.course_id = course.course_id
    LEFT OUTER JOIN member member
    ON course_schedule.regid = member.regid )


    This command in the SQL select Statement section of the grid does, of course, display all records.

    I want the grid to display only those records where the field Session5 (a date field) plus 15 days is equal to or greater than todays date. In other words, if the date, session5 is more than 15 days old, I don't want the row to display. I have tried various various ways to do this, but I can't figure out a way to do it.

    I have tried this format:

    SELECT *, date_add(course_schedule.Session5, INTERVAL 15 day) as expire_date, concat(time_start, ' - ', time_end) AS times, concat(member.title, ' ', member.first_name, ' ', member.last_name) AS instructorname, course_schedule.course_sked_id AS Books
    FROM (course_schedule course_schedule
    INNER JOIN course course
    ON course_schedule.course_id = course.course_id
    LEFT OUTER JOIN member member
    ON course_schedule.regid = member.regid )
    WHERE expire_date >= now()

    and I tried this:

    SELECT *, concat(time_start, ' - ', time_end) AS times, concat(member.title, ' ', member.first_name, ' ', member.last_name) AS instructorname, course_schedule.course_sked_id AS Books
    FROM (course_schedule course_schedule
    INNER JOIN course course
    ON course_schedule.course_id = course.course_id
    LEFT OUTER JOIN member member
    ON course_schedule.regid = member.regid )
    WHERE date_add(course_schedule.Session5, INTERVAL 15 day) >= now()

    I have tried setting an argument in the WHERE command, but I can't get anything to work. The MySQL date_add functions is a valid function, but native or portable syntax does not work.

    Does anyone have an idea of how I can filter the rows for this grid.

    Thanks
    Mike Reed
    Phoenix, AZ

  • #2
    Re: Trouble filtering a grid by date

    i think now() function will return date and time, you mentioned date field so i would test it against the date() function.
    i will test it in a minute.
    thanks for reading

    gandhi

    version 11 3381 - 4096
    mysql backend
    http://www.alphawebprogramming.blogspot.com
    ggandhi344@gmail.com
    Skype:ggandhi344@gmail.com
    1 914 924 5171

    Comment


    • #3
      Re: Trouble filtering a grid by date

      the where clause can be this way
      WHERE session5 < dateAdd(curDate(), INTERVAL 15 day)
      thanks for reading

      gandhi

      version 11 3381 - 4096
      mysql backend
      http://www.alphawebprogramming.blogspot.com
      ggandhi344@gmail.com
      Skype:ggandhi344@gmail.com
      1 914 924 5171

      Comment


      • #4
        Re: Trouble filtering a grid by date

        You're looking to include rows where the Session5 date is not more than 15 days old?

        You can use the MariaDB functions DATE_ADD and CURRENT_DATE() within the WHERE clause...

        Code:
        WHERE session5 > DATE_ADD(CURRENT_DATE, INTERVAL -15 DAY)
        This compares session5 to a calculated date. The calculated date is the CURRENT_DATE minus 15 days.

        Given today's being 2017-10-15, the calculated date will be 2017-09-30.

        If session5 were 2017-10-02, that row would be included... as it's only 13 days old.

        If session5 were 2017-09-27, that row is older than 15 days and would not be included.

        Is this right? Dates always drive me nuts. I tested this with a MariaDB table in a grid.

        Comment


        • #5
          Re: Trouble filtering a grid by date

          session5 NOT MORE THAN 15 days from todays' date should be( the way i understand anything till 15 days from today)
          session5 !> todays' date + 15 days, so it will be session5 < todays' date + 15 days
          search in the internet ( i don't use mariaDB) reveals curDate() and current_date() are synonymous.


          edit:
          the first post says session5 more than 15 days old,
          it will be -15, not +15.

          you can easily do this in alpha five sql genie, and it will yield proper statement for the grid.
          fill in the table info to join and fill in the filter with expression - AddDaysToDate(current date(), -15) it will work. all can be done there.
          Last edited by GGandhi; 10-16-2017, 06:43 AM.
          thanks for reading

          gandhi

          version 11 3381 - 4096
          mysql backend
          http://www.alphawebprogramming.blogspot.com
          ggandhi344@gmail.com
          Skype:ggandhi344@gmail.com
          1 914 924 5171

          Comment


          • #6
            Re: Trouble filtering a grid by date

            David and Ghandi thank you for your help. I know you spent on doing that.

            I was not able to get any of these to work. In every case, this is the error that Alpha displayed, as an example...
            Screen Shot 2017-10-16 at 7.43.49 AM.png
            or this one...
            Screen Shot 2017-10-16 at 7.38.30 AM.png

            So I took the advice from the second one and made a view instead. At least with that it works.

            Thanks again for your help.

            Mike
            Mike Reed
            Phoenix, AZ

            Comment


            • #7
              Re: Trouble filtering a grid by date

              the error is session5 the field should have been course_schedule.session5
              (did you select the table on the dropdown to insert the field name)
              thanks for reading

              gandhi

              version 11 3381 - 4096
              mysql backend
              http://www.alphawebprogramming.blogspot.com
              ggandhi344@gmail.com
              Skype:ggandhi344@gmail.com
              1 914 924 5171

              Comment


              • #8
                Re: Trouble filtering a grid by date

                I printed the screen and then noticed the error. so I corrected my mistype, but the same result.
                Mike Reed
                Phoenix, AZ

                Comment


                • #9
                  Re: Trouble filtering a grid by date

                  okay, i trust you. if you have solved then all is good no matter what.
                  thanks for reading

                  gandhi

                  version 11 3381 - 4096
                  mysql backend
                  http://www.alphawebprogramming.blogspot.com
                  ggandhi344@gmail.com
                  Skype:ggandhi344@gmail.com
                  1 914 924 5171

                  Comment

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