how to extract difference between timestamps

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SQL greenhorn alarm:

I have a table with timestamp information (44 rows) and I now would like to calculate and extract the delta between any two consecutive rows. How can I do this? I select my data with a query like:



SELECT * from "table" where "RecognitionTimestamp" >= '2018-10-03 00:00:00' and "RecognitionTimestamp" <= '2018-10-04 9:00:00'


I'm using pgAdmin4 to submit the query and look at the data.






postgresql query pgadmin syntax







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    up vote
    1
    down vote

    favorite












    SQL greenhorn alarm:

    I have a table with timestamp information (44 rows) and I now would like to calculate and extract the delta between any two consecutive rows. How can I do this? I select my data with a query like:



    SELECT * from "table" where "RecognitionTimestamp" >= '2018-10-03 00:00:00' and "RecognitionTimestamp" <= '2018-10-04 9:00:00'


    I'm using pgAdmin4 to submit the query and look at the data.






    postgresql query pgadmin syntax







    share|improve this question







    New contributor




    cerr is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
    Check out our Code of Conduct.





















      up vote
      1
      down vote

      favorite









      up vote
      1
      down vote

      favorite











      SQL greenhorn alarm:

      I have a table with timestamp information (44 rows) and I now would like to calculate and extract the delta between any two consecutive rows. How can I do this? I select my data with a query like:



      SELECT * from "table" where "RecognitionTimestamp" >= '2018-10-03 00:00:00' and "RecognitionTimestamp" <= '2018-10-04 9:00:00'


      I'm using pgAdmin4 to submit the query and look at the data.






      postgresql query pgadmin syntax







      share|improve this question







      New contributor




      cerr is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.











      SQL greenhorn alarm:

      I have a table with timestamp information (44 rows) and I now would like to calculate and extract the delta between any two consecutive rows. How can I do this? I select my data with a query like:



      SELECT * from "table" where "RecognitionTimestamp" >= '2018-10-03 00:00:00' and "RecognitionTimestamp" <= '2018-10-04 9:00:00'


      I'm using pgAdmin4 to submit the query and look at the data.






      postgresql query pgadmin syntax




      postgresql query pgadmin syntax






      share|improve this question







      New contributor




      cerr is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.











      share|improve this question







      New contributor




      cerr is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.









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      share|improve this question






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      asked 5 hours ago









      cerr

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          1 Answer
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          You can use Windows Functions which provides calculation across a set of table rows that are somehow related to the current row. The list of functions are in General-Purpose Window Functions section of the documentation and The lead() and lag() functions are answer of your question. Your query will should like this;



          SELECT *,
           "RecognitionTimestamp" - lag("RecognitionTimestamp") OVER(ORDER BY "RecognitionTimestamp") AS delta_previous,
           lead("RecognitionTimestamp") OVER(ORDER BY "RecognitionTimestamp") - "RecognitionTimestamp" AS delta_next
          FROM "table" 
          WHERE
           "RecognitionTimestamp" >= '2018-10-03 00:00:00' AND 
           "RecognitionTimestamp" <= '2018-10-04 9:00:00'





          share|improve this answer




















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            1 Answer
            1






            active

            oldest

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            active

            oldest

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            up vote
            2
            down vote



            accepted










            You can use Windows Functions which provides calculation across a set of table rows that are somehow related to the current row. The list of functions are in General-Purpose Window Functions section of the documentation and The lead() and lag() functions are answer of your question. Your query will should like this;



            SELECT *,
             "RecognitionTimestamp" - lag("RecognitionTimestamp") OVER(ORDER BY "RecognitionTimestamp") AS delta_previous,
             lead("RecognitionTimestamp") OVER(ORDER BY "RecognitionTimestamp") - "RecognitionTimestamp" AS delta_next
            FROM "table" 
            WHERE
             "RecognitionTimestamp" >= '2018-10-03 00:00:00' AND 
             "RecognitionTimestamp" <= '2018-10-04 9:00:00'





            share|improve this answer
























              up vote
              2
              down vote



              accepted










              You can use Windows Functions which provides calculation across a set of table rows that are somehow related to the current row. The list of functions are in General-Purpose Window Functions section of the documentation and The lead() and lag() functions are answer of your question. Your query will should like this;



              SELECT *,
               "RecognitionTimestamp" - lag("RecognitionTimestamp") OVER(ORDER BY "RecognitionTimestamp") AS delta_previous,
               lead("RecognitionTimestamp") OVER(ORDER BY "RecognitionTimestamp") - "RecognitionTimestamp" AS delta_next
              FROM "table" 
              WHERE
               "RecognitionTimestamp" >= '2018-10-03 00:00:00' AND 
               "RecognitionTimestamp" <= '2018-10-04 9:00:00'





              share|improve this answer






















                up vote
                2
                down vote



                accepted







                up vote
                2
                down vote



                accepted






                You can use Windows Functions which provides calculation across a set of table rows that are somehow related to the current row. The list of functions are in General-Purpose Window Functions section of the documentation and The lead() and lag() functions are answer of your question. Your query will should like this;



                SELECT *,
                 "RecognitionTimestamp" - lag("RecognitionTimestamp") OVER(ORDER BY "RecognitionTimestamp") AS delta_previous,
                 lead("RecognitionTimestamp") OVER(ORDER BY "RecognitionTimestamp") - "RecognitionTimestamp" AS delta_next
                FROM "table" 
                WHERE
                 "RecognitionTimestamp" >= '2018-10-03 00:00:00' AND 
                 "RecognitionTimestamp" <= '2018-10-04 9:00:00'





                share|improve this answer












                You can use Windows Functions which provides calculation across a set of table rows that are somehow related to the current row. The list of functions are in General-Purpose Window Functions section of the documentation and The lead() and lag() functions are answer of your question. Your query will should like this;



                SELECT *,
                 "RecognitionTimestamp" - lag("RecognitionTimestamp") OVER(ORDER BY "RecognitionTimestamp") AS delta_previous,
                 lead("RecognitionTimestamp") OVER(ORDER BY "RecognitionTimestamp") - "RecognitionTimestamp" AS delta_next
                FROM "table" 
                WHERE
                 "RecognitionTimestamp" >= '2018-10-03 00:00:00' AND 
                 "RecognitionTimestamp" <= '2018-10-04 9:00:00'






                share|improve this answer












                share|improve this answer



                share|improve this answer










                answered 4 hours ago









                Sahap Asci

                1,063411




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