1.0Hogart Business Intelligencehttps://businessintelligence.pl/en/hogart.adminhttps://businessintelligence.pl/en/author/hogart-admin/rich600338<blockquote class="wp-embedded-content" data-secret="5ogUqXNlQL"><a href="https://businessintelligence.pl/en/slownik/left-join/">Left Join</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://businessintelligence.pl/en/slownik/left-join/embed/#?secret=5ogUqXNlQL" width="600" height="338" title="“Left Join” — Hogart Business Intelligence" data-secret="5ogUqXNlQL" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script> /*! This file is auto-generated */ !function(d,l){"use strict";l.querySelector&&d.addEventListener&&"undefined"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!/[^a-zA-Z0-9]/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret="'+t.secret+'"]'),o=l.querySelectorAll('blockquote[data-secret="'+t.secret+'"]'),c=new RegExp("^https?:$","i"),i=0;i<o.length;i++)o[i].style.display="none";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute("style"),"height"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):"link"===t.message&&(r=new URL(s.getAttribute("src")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener("message",d.wp.receiveEmbedMessage,!1),l.addEventListener("DOMContentLoaded",function(){for(var e,t,s=l.querySelectorAll("iframe.wp-embedded-content"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute("data-secret"))||(t=Math.random().toString(36).substring(2,12),e.src+="#?secret="+t,e.setAttribute("data-secret",t)),e.contentWindow.postMessage({message:"ready",secret:t},"*")},!1)))}(window,document); //# sourceURL=https://businessintelligence.pl/wp-includes/js/wp-embed.min.js </script> “Left join” is a type of join operation in SQL that returns all records from the left table and matching records from the right table. When there is no match, columns from the right table are filled with NULL values. This tool enables combining data from two tables based on specified criteria and extracting a […]