{"id":2927,"date":"2026-05-07T10:13:50","date_gmt":"2026-05-07T02:13:50","guid":{"rendered":"https:\/\/tekno.bali-island.com\/?p=2927"},"modified":"2026-05-07T10:13:54","modified_gmt":"2026-05-07T02:13:54","slug":"memahami-konsep-join-dalam-pangkalan-data-sql","status":"publish","type":"post","link":"https:\/\/tekno.bali-island.com\/ms\/articles\/memahami-konsep-join-dalam-pangkalan-data-sql\/","title":{"rendered":"Memahami Konsep JOIN dalam Pangkalan Data SQL"},"content":{"rendered":"\n<p><strong>JOIN<\/strong> dalam SQL ialah klausa yang digunakan untuk menggabungkan baris daripada dua atau lebih jadual berdasarkan lajur yang mempunyai nilai berkaitan. Tujuan utamanya adalah untuk mendapatkan satu set data dengan maklumat yang lengkap dan menyeluruh. &#8220;Lengkap&#8221; yang dimaksudkan di sini ialah susunan data yang diperoleh daripada gabungan lajur-lajur hasil hubungan antara jadual tersebut.<\/p>\n\n\n\n<p>Untuk memenuhi keperluan pengambilan data yang pelbagai, perintah JOIN dibahagikan kepada beberapa jenis, iaitu <strong>OUTER JOIN<\/strong>, <strong>INNER JOIN<\/strong>, <strong>RIGHT JOIN<\/strong>, dan <strong>LEFT JOIN<\/strong>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Perbezaan Jenis-Jenis SQL JOIN<\/strong><\/h2>\n\n\n\n<p>Berikut adalah penjelasan mengenai pelbagai jenis klausa JOIN beserta contoh sintaks penulisannya untuk membantu anda memahami perbezaannya:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>1. FULL OUTER JOIN<\/strong><\/h3>\n\n\n\n<p>Outer join (atau Full Outer Join) akan mengembalikan semua rekod atau baris data, sama ada yang mempunyai nilai padanan (sama) mahupun yang tidak sama pada kedua-dua jadual yang digabung. Jika tiada persamaan data di antara kedua-dua jadual tersebut, maka bahagian yang kosong akan secara automatik diberikan nilai NULL pada hasil join tersebut.<\/p>\n\n\n\n<p><strong>Sintaks penulisan:<\/strong><\/p>\n\n\n\n<p>SQL<\/p>\n\n\n\n<p>SELECT column_name(s)<\/p>\n\n\n\n<p>FROM table1<\/p>\n\n\n\n<p>FULL OUTER JOIN table2<\/p>\n\n\n\n<p>ON table1.column_name = table2.column_name<\/p>\n\n\n\n<p>WHERE condition;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>2. LEFT JOIN<\/strong><\/h3>\n\n\n\n<p>Left Join merupakan operasi yang akan mengembalikan semua rekod dari jadual sebelah kiri (jadual pertama) daripada kedua-dua jadual yang digabungkan. Seluruh data dari jadual kiri akan kekal ditarik dan dipaparkan, walaupun nilai pada jadual kiri tersebut tidak mempunyai persamaan dengan data pada jadual kanan (jadual kedua). Data di jadual kanan yang tidak mempunyai pasangan akan digantikan dengan NULL.<\/p>\n\n\n\n<p><strong>Sintaks penulisan:<\/strong><\/p>\n\n\n\n<p>SQL<\/p>\n\n\n\n<p>SELECT column_name(s)<\/p>\n\n\n\n<p>FROM table1<\/p>\n\n\n\n<p>LEFT JOIN table2<\/p>\n\n\n\n<p>ON table1.column_name = table2.column_name;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>3. RIGHT JOIN (Pelengkap)<\/strong><\/h3>\n\n\n\n<p>Sebagai lawan kepada Left Join, klausa Right Join akan mengembalikan semua rekod dari jadual sebelah kanan (jadual kedua), beserta data yang mempunyai padanan dari jadual sebelah kiri. Jika tiada data yang padan di jadual kiri, maka hasil dari sisi kiri akan bernilai NULL.<\/p>\n\n\n\n<p><strong>Sintaks penulisan:<\/strong><\/p>\n\n\n\n<p>SQL<\/p>\n\n\n\n<p>SELECT column_name(s)<\/p>\n\n\n\n<p>FROM table1<\/p>\n\n\n\n<p>RIGHT JOIN table2<\/p>\n\n\n\n<p>ON table1.column_name = table2.column_name;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>4. INNER JOIN (Pelengkap)<\/strong><\/h3>\n\n\n\n<p>Inner Join adalah jenis klausa yang paling kerap digunakan. Berbeza dengan Outer Join, Inner Join bekerja lebih ketat dengan <strong>hanya<\/strong> mengembalikan baris yang datanya mempunyai padanan (persilangan) di <em>kedua-dua<\/em> jadual yang digabungkan.<\/p>\n\n\n\n<p><strong>Sintaks penulisan:<\/strong><\/p>\n\n\n\n<p>SQL<\/p>\n\n\n\n<p>SELECT column_name(s)<\/p>\n\n\n\n<p>FROM table1<\/p>\n\n\n\n<p>INNER JOIN table2<\/p>\n\n\n\n<p>ON table1.column_name = table2.column_name;<\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>JOIN dalam SQL ialah klausa yang digunakan untuk menggabungkan baris daripada dua atau lebih jadual berdasarkan lajur yang mempunyai nilai berkaitan. Tujuan utamanya adalah untuk mendapatkan satu set data dengan maklumat yang lengkap dan menyeluruh. &#8220;Lengkap&#8221; yang dimaksudkan di sini ialah susunan data yang diperoleh daripada gabungan lajur-lajur hasil hubungan antara jadual tersebut. Untuk memenuhi keperluan pengambilan data yang pelbagai, perintah JOIN dibahagikan kepada beberapa jenis, iaitu OUTER JOIN, INNER JOIN, RIGHT JOIN, dan LEFT JOIN. Perbezaan Jenis-Jenis SQL JOIN Berikut adalah penjelasan mengenai pelbagai jenis klausa JOIN beserta contoh sintaks penulisannya untuk membantu anda memahami perbezaannya: 1. FULL OUTER JOIN Outer join (atau Full Outer Join) akan mengembalikan semua rekod atau baris data, sama ada yang mempunyai nilai padanan (sama) mahupun yang tidak sama pada kedua-dua jadual yang digabung. Jika tiada persamaan data di antara kedua-dua jadual tersebut, maka bahagian yang kosong akan secara automatik diberikan nilai NULL pada hasil join tersebut. Sintaks penulisan: SQL SELECT column_name(s) FROM table1 FULL OUTER JOIN table2 ON table1.column_name = table2.column_name WHERE condition; 2. LEFT JOIN Left Join merupakan operasi yang akan mengembalikan semua rekod dari jadual sebelah kiri (jadual pertama) daripada kedua-dua jadual yang digabungkan. Seluruh data dari jadual kiri akan kekal &hellip;<\/p>\n","protected":false},"author":1,"featured_media":2912,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[99],"tags":[],"class_list":["post-2927","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-programming"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Memahami Konsep JOIN dalam Pangkalan Data SQL<\/title>\n<meta name=\"description\" content=\"Pelajari klausa Join dan sintaks INNER JOIN, LEFT JOIN, RIGHT JOIN, serta FULL OUTER JOIN untuk pengurusan data.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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