I need help on a query regarding fetching data from a database file











up vote
0
down vote

favorite












I have a database where a lot of sensors are sending data. I need to extract the most recent data from Pin 21,20,16,12.
I have written this query but so far it only returns me the last 4 values of the database and not the latest from from all of these pins. What am I doing wrong?Output of my query



select * from Temperature where Pin in (21,20,16,12) and Module =1 order by S_No desc limit 4


Click here to download Database file






database sqlite sqlite3







share|improve this question


























    up vote
    0
    down vote

    favorite












    I have a database where a lot of sensors are sending data. I need to extract the most recent data from Pin 21,20,16,12.
    I have written this query but so far it only returns me the last 4 values of the database and not the latest from from all of these pins. What am I doing wrong?Output of my query



    select * from Temperature where Pin in (21,20,16,12) and Module =1 order by S_No desc limit 4


    Click here to download Database file






    database sqlite sqlite3







    share|improve this question
























      up vote
      0
      down vote

      favorite









      up vote
      0
      down vote

      favorite











      I have a database where a lot of sensors are sending data. I need to extract the most recent data from Pin 21,20,16,12.
      I have written this query but so far it only returns me the last 4 values of the database and not the latest from from all of these pins. What am I doing wrong?Output of my query



      select * from Temperature where Pin in (21,20,16,12) and Module =1 order by S_No desc limit 4


      Click here to download Database file






      database sqlite sqlite3







      share|improve this question













      I have a database where a lot of sensors are sending data. I need to extract the most recent data from Pin 21,20,16,12.
      I have written this query but so far it only returns me the last 4 values of the database and not the latest from from all of these pins. What am I doing wrong?Output of my query



      select * from Temperature where Pin in (21,20,16,12) and Module =1 order by S_No desc limit 4


      Click here to download Database file






      database sqlite sqlite3




      database sqlite sqlite3






      share|improve this question













      share|improve this question











      share|improve this question




      share|improve this question










      asked yesterday









      Usman Khan

      475




      475
























          1 Answer
          1






          active

          oldest

          votes

















          up vote
          0
          down vote













          The answer was to add group by Pin on the end.



          select * from Temperature where Pin in (21,20,16,12) and Module =1 group by Pin


          I am so stupid






          share|improve this answer





















            Your Answer






            StackExchange.ifUsing("editor", function () {
            StackExchange.using("externalEditor", function () {
            StackExchange.using("snippets", function () {
            StackExchange.snippets.init();
            });
            });
            }, "code-snippets");

            StackExchange.ready(function() {
            var channelOptions = {
            tags: "".split(" "),
            id: "1"
            };
            initTagRenderer("".split(" "), "".split(" "), channelOptions);

            StackExchange.using("externalEditor", function() {
            // Have to fire editor after snippets, if snippets enabled
            if (StackExchange.settings.snippets.snippetsEnabled) {
            StackExchange.using("snippets", function() {
            createEditor();
            });
            }
            else {
            createEditor();
            }
            });

            function createEditor() {
            StackExchange.prepareEditor({
            heartbeatType: 'answer',
            convertImagesToLinks: true,
            noModals: true,
            showLowRepImageUploadWarning: true,
            reputationToPostImages: 10,
            bindNavPrevention: true,
            postfix: "",
            imageUploader: {
            brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
            contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
            allowUrls: true
            },
            onDemand: true,
            discardSelector: ".discard-answer"
            ,immediatelyShowMarkdownHelp:true
            });


            }
            });














             

            draft saved


            draft discarded


















            StackExchange.ready(
            function () {
            StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53349293%2fi-need-help-on-a-query-regarding-fetching-data-from-a-database-file%23new-answer', 'question_page');
            }
            );

            Post as a guest















            Required, but never shown

























            1 Answer
            1






            active

            oldest

            votes








            1 Answer
            1






            active

            oldest

            votes









            active

            oldest

            votes






            active

            oldest

            votes








            up vote
            0
            down vote













            The answer was to add group by Pin on the end.



            select * from Temperature where Pin in (21,20,16,12) and Module =1 group by Pin


            I am so stupid






            share|improve this answer

























              up vote
              0
              down vote













              The answer was to add group by Pin on the end.



              select * from Temperature where Pin in (21,20,16,12) and Module =1 group by Pin


              I am so stupid






              share|improve this answer























                up vote
                0
                down vote










                up vote
                0
                down vote









                The answer was to add group by Pin on the end.



                select * from Temperature where Pin in (21,20,16,12) and Module =1 group by Pin


                I am so stupid






                share|improve this answer












                The answer was to add group by Pin on the end.



                select * from Temperature where Pin in (21,20,16,12) and Module =1 group by Pin


                I am so stupid







                share|improve this answer












                share|improve this answer



                share|improve this answer










                answered yesterday









                Usman Khan

                475




                475






























                     

                    draft saved


                    draft discarded



















































                     


                    draft saved


                    draft discarded














                    StackExchange.ready(
                    function () {
                    StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53349293%2fi-need-help-on-a-query-regarding-fetching-data-from-a-database-file%23new-answer', 'question_page');
                    }
                    );

                    Post as a guest















                    Required, but never shown





















































                    Required, but never shown














                    Required, but never shown












                    Required, but never shown







                    Required, but never shown

































                    Required, but never shown














                    Required, but never shown












                    Required, but never shown







                    Required, but never shown







                    -

                    Popular posts from this blog

                    Create new schema in PostgreSQL using DBeaver

                    Image
                    0 At the beginning of my current job I had limited access to DB but recently my role is changed to superuser, admin, and owner. My colleague who was the previous DB admin is able to create a schema or change the permissions as there is a permission tab in the properties and he can change permissions by clicking easily. Would you please let me know how I can create schema and change permissions as well? Why his dbeaver looks different from me? He can easily right click on the schema folder on top of all schemas on the left side column and select create new schema while I do not have that, like the following picture I found on the internet. postgresql database-schema dbeaver share | improve this question
                    Read more

                    Deepest pit of an array with Javascript: test on Codility

                    Image
                    0 $begingroup$ This is the question from a Codility test, as a task in an interview: DeepestPit - problem description A non-empty zero-indexed array A consisting of N integers is given. A pit in this array is any triplet of integers (P, Q, R) such that: ·         0 ≤ P < Q < R < N; ·         sequence [A[P], A[P+1], ..., A[Q]] is strictly decreasing, i.e. A[P] > A[P+1] > ... > A[Q]; ·         sequence A[Q], A[Q+1], ..., A[R] is strictly increasing, i.e. A[Q] < A[Q+1] < ... < A[R]. The depth of a pit (P, Q, R) is the number min {A[P] − A[Q], A[R] − A[Q]}. For example, consider array A consisting of 10 elements such that: A[0] = 0 A[1] = 1 A[2] = 3 A[3] = -2 A[4] = 0 A[5] = 1 A[6] = 0 A[7] = -3 A[8] = 2 A[9] = 3 Triplet (2, 3, 4) is
                    Read more

                    Costa Masnaga

                    Image
                    .mw-parser-output .avviso .mbox-text-div>div,.mw-parser-output .avviso .mbox-text-full-div>div{font-size:90%}.mw-parser-output .avviso .mbox-image div{width:52px}.mw-parser-output .avviso .mbox-text-full-div .hide-when-compact{display:block} Questa voce o sezione sull'argomento Lombardia non cita le fonti necessarie o quelle presenti sono insufficienti . Puoi migliorare questa voce aggiungendo citazioni da fonti attendibili secondo le linee guida sull'uso delle fonti. Segui i suggerimenti del progetto di riferimento. Costa Masnaga comune Localizzazione Stato   Italia Regione Lombardia Provincia Lecco Amministrazione Sindaco Sabina Panzeri (Al centro il cittadino) dall'08/06/2009 Territorio Coordinate 45°46′N 9°17′E  /  45.766667°N 9.283333°E 45.766667; 9.283333  ( Costa Masnaga ) Coordinate: 45°46′N 9°17′E  /  45.766667°N 9.283333°E 45.766667; 9.283333  ( Costa Masnaga ) Altitudine 318 m s.l.m
                    Read more