Need to Combine two mysql select queries into one efficientlyHow to get non-deleted messages for one user_id...

Does red noise even at low values mean a hardware problem with my camera's sensor?

Does copper wire need to say it's copper?

Boss asked me to sign a resignation paper without a date on it along with my new contract

Calculating the strength of an ionic bond that contains poly-atomic ions

What is the second derivative with respect to price of a put option?

How can I handle players killing my NPC outside of combat?

Sri Keyuravati of krama tradition

In a post-apocalypse world, with no power and few survivors, would Satnav still work?

How do I narratively explain how in-game circumstances do not mechanically allow a PC to instantly kill an NPC?

Do the speed limit reductions due to pollution also apply to electric cars in France?

Renting a 2CV in France

In the Lost in Space intro why was Dr. Smith actor listed as a special guest star?

How can I prevent an oracle who can see into the past from knowing everything that has happened?

Sticky Strike or Sticky Delta

Coworker asking me to not bring cakes due to self control issue. What should I do?

Even as admin, I cannot edit DefaultFonts.plist for Notes.app. What am I doing wrong?

"I showed the monkey himself in the mirror". Why is this sentence grammatical?

Is "accuse people to be racist" grammatical?

Why do objects rebound after hitting the ground?

How can guns be countered by melee combat without raw-ability or exceptional explanations?

What are some idioms that means something along the lines of "switching it up every day to not do the same thing over and over"?

Is the UK legally prevented from having another referendum on Brexit?

Is it possible to detect 100% of SQLi with a simple regex?

Why is it that Bernie Sanders is always called a "socialist"?



Need to Combine two mysql select queries into one efficiently


How to get non-deleted messages for one user_id if the same user_id appears in two tables at same time?Can I execute a prepared statement inside a MySQL SELECT?MYSQL Combine two results into onecompare results between two select queries MySQLPrivilege to select only user's own tuple only in mysqlHelp combining two MySQL queries to improve performanceHow to combine “SELECT” and “REPLACE INTO” when combining two MySQL tables into another?Combine two queries to oneDoes MySQL allows incoming queries while altering a table?SQL schema for movie rating and seenlist













0















user



id   |  name
1 | A
2 | B


article



id   | title | descritption
1 | wx | xyz
2 | yz | abc


article_rating



article_id(article->id)  |  given_by(user->id)  |  given_rating
1 2 4
2 1 3


saved_article



article_id(article->id)  |  saved_by(user->id) 
1 2


I'm changing some buttons and icons depending on whether a user has rated/ saved an article or not. I'm using two select queries for that:



rated or not



SELECT given_rating as rating 
FROM article_rating
WHERE given_by=? AND article_id=?


saved or not



SELECT saved_by as saved 
FROM saved_article
WHERE saved_by=? AND article_id=?


So my question is how can i combine both into one mysql query efficiently??









share



























    0















    user



    id   |  name
    1 | A
    2 | B


    article



    id   | title | descritption
    1 | wx | xyz
    2 | yz | abc


    article_rating



    article_id(article->id)  |  given_by(user->id)  |  given_rating
    1 2 4
    2 1 3


    saved_article



    article_id(article->id)  |  saved_by(user->id) 
    1 2


    I'm changing some buttons and icons depending on whether a user has rated/ saved an article or not. I'm using two select queries for that:



    rated or not



    SELECT given_rating as rating 
    FROM article_rating
    WHERE given_by=? AND article_id=?


    saved or not



    SELECT saved_by as saved 
    FROM saved_article
    WHERE saved_by=? AND article_id=?


    So my question is how can i combine both into one mysql query efficiently??









    share

























      0












      0








      0








      user



      id   |  name
      1 | A
      2 | B


      article



      id   | title | descritption
      1 | wx | xyz
      2 | yz | abc


      article_rating



      article_id(article->id)  |  given_by(user->id)  |  given_rating
      1 2 4
      2 1 3


      saved_article



      article_id(article->id)  |  saved_by(user->id) 
      1 2


      I'm changing some buttons and icons depending on whether a user has rated/ saved an article or not. I'm using two select queries for that:



      rated or not



      SELECT given_rating as rating 
      FROM article_rating
      WHERE given_by=? AND article_id=?


      saved or not



      SELECT saved_by as saved 
      FROM saved_article
      WHERE saved_by=? AND article_id=?


      So my question is how can i combine both into one mysql query efficiently??









      share














      user



      id   |  name
      1 | A
      2 | B


      article



      id   | title | descritption
      1 | wx | xyz
      2 | yz | abc


      article_rating



      article_id(article->id)  |  given_by(user->id)  |  given_rating
      1 2 4
      2 1 3


      saved_article



      article_id(article->id)  |  saved_by(user->id) 
      1 2


      I'm changing some buttons and icons depending on whether a user has rated/ saved an article or not. I'm using two select queries for that:



      rated or not



      SELECT given_rating as rating 
      FROM article_rating
      WHERE given_by=? AND article_id=?


      saved or not



      SELECT saved_by as saved 
      FROM saved_article
      WHERE saved_by=? AND article_id=?


      So my question is how can i combine both into one mysql query efficiently??







      mysql





      share












      share










      share



      share










      asked 4 mins ago









      Share cornShare corn

      1




      1






















          0






          active

          oldest

          votes











          Your Answer








          StackExchange.ready(function() {
          var channelOptions = {
          tags: "".split(" "),
          id: "182"
          };
          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',
          autoActivateHeartbeat: false,
          convertImagesToLinks: false,
          noModals: true,
          showLowRepImageUploadWarning: true,
          reputationToPostImages: null,
          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%2fdba.stackexchange.com%2fquestions%2f230611%2fneed-to-combine-two-mysql-select-queries-into-one-efficiently%23new-answer', 'question_page');
          }
          );

          Post as a guest















          Required, but never shown

























          0






          active

          oldest

          votes








          0






          active

          oldest

          votes









          active

          oldest

          votes






          active

          oldest

          votes
















          draft saved

          draft discarded




















































          Thanks for contributing an answer to Database Administrators Stack Exchange!


          • Please be sure to answer the question. Provide details and share your research!

          But avoid



          • Asking for help, clarification, or responding to other answers.

          • Making statements based on opinion; back them up with references or personal experience.


          To learn more, see our tips on writing great answers.




          draft saved


          draft discarded














          StackExchange.ready(
          function () {
          StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fdba.stackexchange.com%2fquestions%2f230611%2fneed-to-combine-two-mysql-select-queries-into-one-efficiently%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

          Discografia di Klaus Schulze Indice Album in studio | Album dal vivo | Singoli | Antologie | Colonne...

          Lupi Siderali Indice Storia | Organizzazione | La Tredicesima Compagnia | Aspetto | Membri Importanti...

          Armoriale delle famiglie italiane (Car) Indice Armi | Bibliografia | Menu di navigazioneBlasone...