{"id":1590,"date":"2021-05-23T21:00:00","date_gmt":"2021-05-23T15:30:00","guid":{"rendered":"https:\/\/www.codingbroz.com\/?p=1590"},"modified":"2021-06-20T21:59:23","modified_gmt":"2021-06-20T16:29:23","slug":"symmetric-pairs-sql-solution","status":"publish","type":"post","link":"https:\/\/www.codingbroz.com\/symmetric-pairs-sql-solution\/","title":{"rendered":"Symmetric Pairs in SQL | HackerRank Solution"},"content":{"rendered":"\n<p>Hello coders, today we are going to solve <strong>Symmetric Pairs HackerRank Solution in SQL<\/strong>.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1200\" height=\"676\" src=\"https:\/\/www.codingbroz.com\/wp-content\/uploads\/2021\/05\/symmetric-pairs-sql-solution-codingbroz.png\" alt=\"Symmetric Pairs\" class=\"wp-image-1592\" srcset=\"https:\/\/www.codingbroz.com\/wp-content\/uploads\/2021\/05\/symmetric-pairs-sql-solution-codingbroz.png 1200w, https:\/\/www.codingbroz.com\/wp-content\/uploads\/2021\/05\/symmetric-pairs-sql-solution-codingbroz-768x433.png 768w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_65 ez-toc-wrap-left counter-hierarchy ez-toc-counter ez-toc-custom ez-toc-container-direction\">\n<label for=\"ez-toc-cssicon-toggle-item-6636735df0a8a\" class=\"ez-toc-cssicon-toggle-label\"><label class=\"ez-toc-title\">Table of Contents<\/label>\n<span class=\"ez-toc-cssicon\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #0090ff;color:#0090ff\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #0090ff;color:#0090ff\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/label><input type=\"checkbox\"  id=\"ez-toc-cssicon-toggle-item-6636735df0a8a\" checked \/><nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.codingbroz.com\/symmetric-pairs-sql-solution\/#Problem\" title=\"Problem\">Problem<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.codingbroz.com\/symmetric-pairs-sql-solution\/#Solution_%E2%80%93_Symmetric_Pairs_in_SQL\" title=\"Solution &#8211; Symmetric Pairs in SQL\">Solution &#8211; Symmetric Pairs in SQL<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.codingbroz.com\/symmetric-pairs-sql-solution\/#MySQL\" title=\"MySQL\">MySQL<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Problem\"><\/span><strong>Problem<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>You are given a table,&nbsp;<em>Functions<\/em>, containing two columns:&nbsp;<em>X&nbsp;<\/em>and&nbsp;<em>Y<\/em>.<\/p>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table><thead><tr><th>Column<\/th><th>Type<\/th><\/tr><\/thead><tbody><tr><td><em>X<\/em><\/td><td><em>Integer<\/em><\/td><\/tr><tr><td><em>Y<\/em><\/td><td><em>Integer<\/em><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>Two pairs&nbsp;<em>(X<sub>1<\/sub>, Y<sub>1<\/sub>)<\/em>&nbsp;and&nbsp;<em>(X<sub>2<\/sub>, Y<sub>2<\/sub>)<\/em>&nbsp;are said to be&nbsp;<em>symmetric<\/em>&nbsp;<em>pairs<\/em>&nbsp;if&nbsp;<em>X<sub>1<\/sub>&nbsp;= Y<sub>2<\/sub><\/em>&nbsp;and&nbsp;<em>X<sub>2<\/sub>&nbsp;= Y<sub>1<\/sub><\/em>.<\/p>\n\n\n\n<p>Write a query to output all such&nbsp;<em>symmetric<\/em>&nbsp;<em>pairs<\/em>&nbsp;in ascending order by the value of&nbsp;<em>X<\/em>. List the rows such that&nbsp;<em>X<sub>1<\/sub>&nbsp;\u2264 Y<sub>1<\/sub><\/em>.<\/p>\n\n\n\n<p><strong>Sample Input<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table><thead><tr><th>X<\/th><th>Y<\/th><\/tr><\/thead><tbody><tr><td><em>20<\/em><\/td><td><em>20<\/em><\/td><\/tr><tr><td><em>20<\/em><\/td><td><em>20<\/em><\/td><\/tr><tr><td><em>20<\/em><\/td><td><em>21<\/em><\/td><\/tr><tr><td><em>23<\/em><\/td><td><em>22<\/em><\/td><\/tr><tr><td><em>22<\/em><\/td><td><em>23<\/em><\/td><\/tr><tr><td><em>21<\/em><\/td><td><em>20<\/em><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><strong>Sample Output<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>20 20\n20 21\n22 23<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Solution_%E2%80%93_Symmetric_Pairs_in_SQL\"><\/span><strong>Solution &#8211; Symmetric Pairs in SQL<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"MySQL\"><\/span><strong>MySQL<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"sql\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">SELECT X,\n       Y\nFROM FUNCTIONS F1\nWHERE EXISTS\n    (SELECT *\n     FROM FUNCTIONS F2\n     WHERE F2.Y = F1.X\n       AND F2.X = F1.Y\n       AND F2.X > F1.X)\n  AND (X != Y)\nUNION\nSELECT X,\n       Y\nFROM FUNCTIONS F1\nWHERE X = Y\n  AND (\n         (SELECT COUNT(*)\n          FROM FUNCTIONS\n          WHERE X = F1.X\n            AND Y = F1.X) > 1)\nORDER BY X;<\/pre>\n\n\n\n<script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script>\n<ins class=\"adsbygoogle\"\n     style=\"display:block; text-align:center;\"\n     data-ad-layout=\"in-article\"\n     data-ad-format=\"fluid\"\n     data-ad-client=\"ca-pub-5246141430412355\"\n     data-ad-slot=\"8798433565\"><\/ins>\n<script>\n     (adsbygoogle = window.adsbygoogle || []).push({});\n<\/script>\n\n\n\n<p><strong>Disclaimer:<\/strong> The above Problem <strong>(<a href=\"https:\/\/www.hackerrank.com\/challenges\/symmetric-pairs\/problem\" target=\"_blank\" rel=\"noreferrer noopener\" class=\"rank-math-link\">Symmetric Pairs<\/a>)<\/strong> is generated by <strong>Hacker Rank<\/strong> but the Solution is Provided by <strong>CodingBroz<\/strong>. This tutorial is only for <strong>Educational<\/strong> and <strong>Learning<\/strong> Purpose.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Hello coders, today we are going to solve Symmetric Pairs HackerRank Solution in SQL.<\/p>\n","protected":false},"author":1,"featured_media":1592,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"default","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[9,138],"tags":[80,18,139,156],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"https:\/\/www.codingbroz.com\/wp-content\/uploads\/2021\/05\/symmetric-pairs-sql-solution-codingbroz.png","jetpack-related-posts":[],"_links":{"self":[{"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/posts\/1590"}],"collection":[{"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/comments?post=1590"}],"version-history":[{"count":3,"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/posts\/1590\/revisions"}],"predecessor-version":[{"id":3507,"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/posts\/1590\/revisions\/3507"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/media\/1592"}],"wp:attachment":[{"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/media?parent=1590"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/categories?post=1590"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/tags?post=1590"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}