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Inner Join Query - VariableTime

Discussion in 'Databases' started by johnberman, Jun 16, 2021.

  1. #1
    Hi

    I have two tables
    meteor_Events and video_Events and the common fields are Date and Time

    I want to search meteor_events where the date and time match any video events so using this query it works fine

    SELECT
        meteor_events.event_id,
        meteor_events.fname,
        meteor_events.date,
        meteor_events.Time
    FROM
        Video_Events
        INNER JOIN
        meteor_events
        ON
            Video_Events.Date = meteor_events.date AND
            Video_Events.Time = meteor_events.Time
    Code (SQL):
    I now want to refine this and bring back results where the date matches but the time matches if the meteor_events.Time is plus or minus 2 seconds

    ie if the Video_Events.Time is say 00:12:34 bring back results if the meteor_events.Time is between 00:12:32 and 00:12:36

    Pointers appreciated

    Kind Regards
    John Berman
     
    johnberman, Jun 16, 2021 IP
  2. JEET

    JEET Notable Member

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    #2
    Look into addtime and subtime functions.

    SELECT
    meteor_events.event_id,
    meteor_events.fname,
    meteor_events.date,
    meteor_events.Time
    FROM
    Video_Events
    INNER JOIN
    meteor_events
    ON
    Video_Events.Date = meteor_events.date AND
    ( Video_Events.Time >= subtime(meteor_events.Time, "2") or
    Video_Events.Time <= addtime(meteor_events.Time, "2")
    )
     
    JEET, Jun 28, 2021 IP